Frequently Asked Questions

IGEM/UP11

IGEM UP/11 discusses gas safety in educational establishments such as schools, colleges and university explaining in details requirements in standard science laboratories and home economics rooms.
IGEM/UP/11 shows that it is mandatory in science laboratories to have the ability to isolate the gas supply, whether this be by means of a manual valve (ECV) such as a quarter-turn fitted by the entrance to the room, or an automatic isolation valve (gas solenoid valve) linked with an emergency stop button. However, in section 6.2.4 it does state where a gas solenoid valve is installed then a “downstream integrity check) must be included otherwise known as a gas proving test.

A gas pressure proving system will check for any leaks on the pipework or on the benches at start-up, in the event where a gas leak is detected then this will not allow the gas solenoid valve to open. There must be a means of isolation fitted in a “readily accessible position” which most often is by each main exit(s) to the room, so there is a way of shutting off the gas supply in the event of an emergency.

IGEM/UP/11 goes on to discuss the requirements for CO2 and ventilation in a home economics room to ensure the safety of the children and to ensure air quality is at a safe level. For a new installation, where ventilation is installed to extract combustible gases then this should be interlocked by means of air pressure differential switch or current monitor. Where mechanical ventilation is fitted purely for climate control within the room then the need to interlock the ventilation with the gas supply should be analysed by means of a risk assessment.

In the event where the ventilation requirements cannot be met then a carbon dioxide monitor should be installed at seating height (roughly 1.5 metres from floor level). The CO2 monitor should alarm at 2800ppm to notify the teachers or occupants to increase ventilation, where the CO2 levels in the room continue to rise and exceed 5000ppm then the gas supply should be automatically isolated.

Although it is not mentioned within IGEM/UP11, it is very popular in science laboratories to also control the electric and water supply to the benches through the gas proving system.

Yes, in the UK, the interlocking of the gas supply with the mechanical ventilation in a science laboratory is a regulatory requirement under certain circumstances, as per IGEM UP/11 and other relevant guidelines. This is primarily to ensure safety by preventing the accumulation of gas in the event of a ventilation failure.

Key Points from IGEM UP/11 and Related Guidelines:

1. Gas Safety Interlock:
   • IGEM UP/11 (which stands for Institution of Gas Engineers and Managers Utilization Procedures) provides guidance on the installation of gas appliances and associated systems in educational establishments, including science laboratories.
   • It mandates that where gas appliances are installed in a laboratory, the gas supply must be interlocked with the mechanical ventilation system. This means that if the ventilation system fails or is turned off, the gas supply must automatically shut off.
2. Purpose:
   • The purpose of this interlock is to prevent the risk of gas leaks and the potential buildup of flammable gases, which could pose a significant explosion risk, especially in a confined laboratory space.

As per IGEM UP/11, in the event where the ventilation requirements cannot be met then a carbon dioxide monitor should be installed at seating height (roughly 1.5 metres from floor level). The CO2 monitor should alarm at 2800ppm to notify the teachers or occupants to increase ventilation, where the CO2 levels in the room continue to rise and exceed 5000ppm then the gas supply should be automatically isolated.

IGEM UP/11

As mentioned above, if there is no mechanical ventilation installed within the science laboratory, IGEM UP/11 states that a CO2 monitor should be installed.

BB101

Building Bulletin 101 is a document produced to give guidance on the ventilation requirements within school buildings.

Building Bulletin 101 discusses both mechanical and natural ventilation within the schools building in great depth, but also makes a number of references to carbon dioxide monitoring. This is based on the need to control carbon dioxide produced by respiration of occupants. In teaching and learning spaces, in the absence of any major pollutants, carbon dioxide is taken to be the key indicator of ventilation performance for the control of indoor air quality.

Carbon dioxide should be measured at seating height and the average concentration should not exceed 1500ppm between the start and end of the day. Building Bulletin 101 states that there should be a carbon dioxide monitor fitted in every learning or teaching space in the school. The CO2 Monitor should give the staff and occupants a visual display of the conditions within the room by means of a traffic light system to notify them if the ventilation should be increased.

The CO2 Monitors can be used to automatically control the ventilation in some situations, but where this is not practical or possible then the monitors can be used just to give indication and then the occupant can act accordingly to reduce the levels of carbon dioxide in the area, for example increasing natural ventilation by means of opening windows and doors etc.

Part F

Part F of the UK Building Regulations focuses on the ventilation requirements for buildings to ensure a healthy indoor environment. While it primarily deals with airflow, it does touch upon the importance of monitoring indoor air quality, which can include CO₂ levels.

CO₂ Monitors in Science Laboratories and School Classrooms (Part F Context):

1. CO₂ Monitoring for Indoor Air Quality:
   • Part F of the Building Regulations recommends the use of CO₂ monitors as a way to ensure that adequate ventilation is being maintained in occupied spaces, including school classrooms and science laboratories. High levels of CO₂ can indicate insufficient ventilation, which could lead to poor air quality and reduced oxygen levels, potentially affecting occupant health and performance.
2. Application in Science Laboratories:
   • In science laboratories, where gas use and other activities can affect air quality, monitoring CO₂ levels is particularly important. A CO₂ monitor can help to quickly identify when ventilation needs to be increased to maintain a safe and comfortable environment.
   • Although Part F does not mandate CO₂ monitors specifically for science labs, it supports their use as part of ensuring adequate ventilation. Given the potential for higher CO₂ levels due to lab activities, incorporating CO₂ monitors is considered good practice.
3. Guidance on Ventilation Rates:
   • Part F provides guidance on minimum ventilation rates for different spaces, including educational settings. CO₂ monitors can be used to ensure that these rates are being met, especially in spaces like science laboratories where the activities may lead to a higher production of CO₂ and other gases.

While Part F of the Building Regulations does not specifically mandate CO₂ monitors in science laboratories, it encourages their use as a means to monitor and maintain indoor air quality. This is particularly relevant in spaces like science labs, where maintaining safe levels of CO₂ is important for both safety and comfort. Schools are encouraged to use CO₂ monitors to help ensure that ventilation systems are working effectively and to adjust ventilation as needed based on CO₂ levels.

S&S Northern’s gas proving and ventilation interlocking systems are expertly designed to meet IGEM/UP11 standards, ensuring optimal safety in educational science laboratories. These systems ensure that gas is only supplied when it’s safe to do so, verifying that all outlets are closed and that ventilation is fully operational before allowing gas flow.

Our solutions have been installed in thousands of schools, colleges, and universities worldwide, demonstrating their reliability and effectiveness in maintaining safe laboratory environments. By automatically preventing gas leaks and ensuring proper ventilation, our systems protect students, staff, and facilities from potential hazards.

Choosing S&S Northern means investing in proven, trusted technology that meets rigorous safety standards such as CE, UKCA and ULC, providing peace of mind and safeguarding educational spaces globally. Our commitment to safety and compliance makes us a leader in laboratory gas safety solutions.

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BS6173:2020

BS6173 was originally introduced in 2001 revised in 2009 and revised again in 2020, this document makes reference to gas installations within commercial kitchens. It states gas should not be available within the commercial kitchen if the ventilation is not in operation, and this should be controlled by a gas interlock system.

The Gas Interlock System must be CE marked.

A gas interlock system is required to be fitted within every new commercial kitchen which has been built since 2001 or has had any major refurbishment since the release of BS6173:2001.

There are a couple of different ways which a gas interlock system can check that the ventilation is in operation. Firstly, air pressure differential switches can be fitted in the ducting and will physical check for airflow before allowing the gas solenoid valve to open. Alternatively, a more modern method is to use current monitors which will check for a power supply going to the fan and control the gas solenoid valve accordingly. If either at start-up, or during the course of the operation, the fans fail or are turned off the gas solenoid valve will automatically close.

Another aspect of BS6173:2009 is gas pressure proving. The standard states if any of the catering equipment does not have a flame failure device a gas pressure proving system should be installed. A gas pressure proving system will check for any leaks on the pipework or on the appliances at start-up, in the event where a gas leak is detected then this will not allow the gas solenoid valve to open.

The majority of appliances which have been built within the last 10 years should have flame failure devices fitted, however in a kitchen where every appliances does have flame failure devices fitted then gas proving is often still recommended to carry out a gas check on the line and ensure the safety of kitchen staff in the area.

IGEM UP/19

IGEM UP/19  is a recommendation which was introduced in November 2014 and it is written to supersede TB140 (Edition 2) which was previously released in June 2014 and also back up a number of statements within BS6173:2009.

It states gas should not be available within the commercial kitchen if the ventilation is not in operation, and this should be controlled by a gas interlock system. IGEM/UP19 once again states that the gas interlock system can check the ventilation using either air pressure differential switch or current monitors.

IGEM/UP19 does clarify a number of things which are listed in BS6173:2009 however it makes a lot more references to carbon dioxide monitoring within a commercial kitchen. CO2 Monitors should be considered within a commercial kitchen, which hasn’t had any major refurbishment, and there is no gas interlock system is fitted as a means of indicating to staff when the carbon dioxide is increasing and to notify them that they should increase the ventilation within the area.

Also, IGEM/UP19 states that a carbon dioxide monitor should be fitted when there is a variable speed controller to control the ventilation. Where variable speed controllers are fitted the end user has the ability to have all the gas appliances in operation but just trickle the ventilation at a low speed and therefore the CO2 is likely to increase. The CO2 Monitor should alarm at first and second stage, the first stage warning staff at 2800ppm to let them know that they should increase ventilation. In the event where the CO2 continues to rise and the ventilation is not increased, once the CO2 Monitor reaches 5000ppm then (where applicable) the gas solenoid valve shut be closed.

Positioning of the CO2 Monitors within the commercial kitchen is included within DW172 – Edition 2.

DW172

DW/172 is the BESA specification for Kitchen Ventilation Systems and since its release in 2005 has become widely acknowledged as the authoritative specification for kitchen ventilation design throughout the UK and many parts of the world.

DW/172 was revised in January 2018 in order to reflect current legislations and the latest cooking techniques and design of catering equipment, by all sections of the catering industry.

The sections that have been modified and amended are –

• The appliance coefficient schedule has been significantly expanded and modified
• Modification to Grease Separation
• The lighting section has been modernised
• New section for Solid Fuel Equipment
• New section for Demand Controlled Kitchen Ventilation Systems
• Gas Interlocking
• Modifications to Pollution Control
• New Section for Recirculation Systems
• Modifications to Cleaning and Maintenance
• Control Panels

Yes, a remote emergency shut off button is recommended at each exit for commercial kitchens to quickly cut off the gas supply in case of an emergency. All of the Merlin Gas Interlock Systems include a front mounted emergency gas shut off button. This adds an extra layer of safety, aligning with best practices in gas safety management.

Two main methods are available for interlocking with mechanical ventilation: air pressure differential switches, which detect airflow in the ducting, and fan current monitors, which check the power supply to the fan. Both methods ensure the gas supply is shut off if the ventilation fails and are available off the shelf from S&S Northern Ltd.

A CO2 monitor isn’t required by regulation in a commericial kitchen, however it is recommended, especially where variable speed ventilation is used. It helps monitor carbon dioxide, air quality levels and alerts staff to increase ventilation if necessary, ensuring a safe environment.

However, under Part F of the Building Regulations, CO2 monitoring is required in occupiable spaces to ensure adequate ventilation and maintain indoor air quality, making it a crucial element in both safety and regulatory compliance.

Gas pressure proving is required if any catering equipment lacks a flame failure device, as per BS6173:2009. It checks for gas leaks before allowing gas flow, enhancing safety. Even if all appliances have flame failure devices, gas pressure proving is still recommended for added protection.

The Merlin gas interlock systems by S&S Northern has been a trusted solution for commercial kitchens since 1995. Our gas interlocks are designed to ensure the safety and compliance of your kitchen by monitoring and controlling gas flow based on ventilation performance. With tens of thousands of Merlin interlock systems installed across the UK and worldwide, they have become a staple in commercial kitchen safety to meet BS6173, with over 10 models available. Our gas interlock systems are continually updated to meet the latest regulations set by British Standards, IGEM, and other governing bodies. These updates ensure that your kitchen remains compliant with the most current gas and ventilation control requirements.

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BS6644

A means of gas isolation must be incorporated at the entrance to the boiler room.

If it’s not practical to fit a manually operated valve, in an easily accessible position, then an electronic control valve can be fitted with an emergency knock-off button. (Such as the Merlin 500s with S&S Gas Solenoid Valve & Remote Emergency Stop).

BB100

Building Bulletin 100 is a document which discusses fire safety in educational establishments and explains the requirements for science laboratories, kitchens and school boiler rooms.

Building Bulletin 100 states that school plant rooms (where they are part of the main building) should be classed as a high fire risk and therefore recommends the following precautions –

• An emergency knock-off button should be installed at the entrance of the boiler room and connected up to the isolation valve so there is a way of isolating the gas supply in the event of a emergency.
• Heat detectors should be included over each boiler. If the boiler was ever to catch fire, the heat detector would automatically alarm and cause the gas solenoid valve to shut off.
• The gas solenoid valve can be automatically reset in the event of a power failure to reduce the risk of frozen pipework in cold periods, however in the event of a genuine alarm the system must be manually reset to restore the gas supply.
• Gas Detectors are recommended to be connected to a gas detection system, in the event where a gas is detected then this should cause the system to give out an audible alarm and shut off the fuel supply in the boiler room. The most common detectors used are carbon monoxide and natural gas. However, for LPG installations an LPG detector should be considered.

The detectors should be fitted at the following locations –

Natural Gas – 300mm from the ceiling

Carbon Monoxide – 1700mm from the floor

LPG – 300mm from the floor

Yes, gas detection is recommended in boiler rooms, especially in educational establishments as outlined in Building Bulletin 100 (BB101). Gas detectors should monitor for hazardous gases like methane, carbon monoxide, or LPG. If gas is detected, the system should trigger an audible alarm and automatically shut off the fuel supply to ensure safety.

Yes, an emergency shut off button should be installed at the entrance of the boiler room, as recommended by BB101 and BS6644. This button provides a quick way to isolate the gas supply in case of an emergency, enhancing safety and compliance.

Gas pressure proving is not required in boiler rooms, however it is required if the boiler does not have flame failure devices and in educational establishments.

In educational establishments, yes. Heat detectors or fusible links are required above each boiler, as per BB101. These devices automatically shut off the gas supply if the temperature exceeds safe limits, preventing fires and enhancing safety.

In all other commercial & light industrial boiler rooms, heat detectors are installed as best industry practice and to further protect life & property.

S&S Northern’s boiler room gas detection and isolation systems are expertly engineered to provide comprehensive protection against hazardous gases such as methane, carbon monoxide, and LPG. As a leading supplier, we manufacture and supply advanced systems designed to enhance the safety and compliance of industrial and commercial boiler rooms.

Our high-precision gas detectors are designed to monitor gas levels continuously, offering real-time alerts for dangerous concentrations and enabling early intervention. Our product range includes critical ancillary components such as emergency stop buttons, which facilitate immediate gas supply shutdown in emergencies, and fusible links that automatically close the gas supply if temperatures exceed safe limits, safeguarding against overheating.

Additionally, we provide remote audible alarm beacons that notify personnel of gas detection events or system malfunctions from a distance, ensuring prompt awareness and action. Our selection of solenoid valves, including normally closed types, is crucial for effective gas control, automatically shutting off the supply when unsafe conditions are detected.

With thousands of installations globally, our systems are renowned for their reliability and compliance with the latest British Standards and IGEM regulations. Choose S&S Northern for high-quality, reliable gas detection and isolation products that support safe and efficient boiler room operations.

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• Carbon Dioxide Detectors (CO2)
• Carbon Monoxide Detectors (CO)
• Hydrogen Detectors Detectors (H2)
• Hydrogen Sulphide Detectors (H2S)
• Liquified Petroleum Gas (LPG)
• Natural Gas (CH4)
• Nitrogen Dioxide (NO2)
• Oxygen Depletion/Enrichment
• Particulate Matter (PM1, PM2.5, PM10)
• Refrigerants (40+ available)
• Volatile Organic Compounds

• Carbon Dioxide Detectors (CO2):
  • Mounting Height: Near the floor or at breathing level (usually 12-18 inches from the floor).
  • Why: CO2 is heavier than air and tends to settle at lower levels.
• Carbon Monoxide Detectors (CO):
  • Mounting Height: At head height (around 5-6 feet above the floor).
  • Why: CO has a similar density to air, so it disperses evenly in a room and is best detected at breathing level.
• Hydrogen Detectors (H2):
  • Mounting Height: Near the ceiling (12 inches or less from the ceiling).
  • Why: Hydrogen is much lighter than air, so it rises and accumulates near the ceiling.
• Hydrogen Sulphide Detectors (H2S):
  • Mounting Height: At breathing level or slightly lower (3-5 feet above the floor).
  • Why: H2S is slightly heavier than air, so it tends to settle lower but can also be detected at breathing height.
• Liquified Petroleum Gas (LPG):
  • Mounting Height: Near the floor (6-12 inches above the floor).
  • Why: LPG is heavier than air and settles close to the ground.
• Natural Gas (CH4):
  • Mounting Height: Near the ceiling (12 inches or less from the ceiling).
  • Why: Methane (CH4) is lighter than air, so it rises and accumulates near the ceiling.
• Nitrogen Dioxide (NO2):
  • Mounting Height: Slightly above head height (6-7 feet above the floor).
  • Why: NO2 is heavier than air and tends to settle lower but can be detected slightly above head height for early detection.
• Oxygen Depletion/Enrichment:
  • Mounting Height: At breathing level (5-6 feet above the floor).
  • Why: Oxygen levels need to be monitored where people breathe, so detectors are placed at this height.
• Particulate Matter (PM1, PM2.5, PM10):
  • Mounting Height: At breathing level (5-6 feet above the floor).
  • Why: Particulates are typically measured at breathing height to assess air quality and inhalation risk.
• Refrigerants:
  • Mounting Height: Dependent on the refrigerant type; generally near the floor for heavier refrigerants (like R-22) and near the ceiling for lighter refrigerants (like R-134a).
  • Why: Refrigerants can vary in density, so mounting height depends on whether they are heavier or lighter than air.
• Volatile Organic Compounds (VOCs):
  • Mounting Height: At breathing level (5-6 feet above the floor).
  • Why: VOCs are typically detected at the height where they pose a risk to human health, usually at breathing level.

• Carbon Dioxide Detectors (CO2):
  • Applications: Breweries, greenhouses, indoor air quality monitoring, industrial plants, and laboratories.
• Carbon Monoxide Detectors (CO):
  • Applications: Residential homes, parking garages, boiler rooms, commercial buildings, and industrial facilities.
• Hydrogen Detectors (H2):
  • Applications: Battery charging rooms, hydrogen production facilities, fuel cell technology, and laboratories.
• Hydrogen Sulphide Detectors (H2S):
  • Applications: Oil and gas facilities, wastewater treatment plants, sewers, and chemical processing plants.
• Liquified Petroleum Gas (LPG):
  • Applications: Commercial kitchens, storage facilities, vehicle refueling stations, and residential homes.
• Natural Gas (CH4):
  • Applications: Residential homes, boiler rooms, gas pipelines, industrial plants, and commercial kitchens.
• Nitrogen Dioxide (NO2):
  • Applications: Vehicle exhaust monitoring in parking garages, industrial facilities, tunnels, and environmental monitoring.
• Oxygen Depletion/Enrichment:
  • Applications: Laboratories, confined spaces, medical facilities, and industrial gas storage areas.
• Particulate Matter (PM1, PM2.5, PM10):
  • Applications: Air quality monitoring in urban areas, industrial facilities, and clean rooms.
• Refrigerants:
  • Applications: HVAC systems, cold storage rooms, supermarkets, and industrial refrigeration.
• Volatile Organic Compounds (VOCs):
  • Applications: Indoor air quality monitoring, industrial processes, paint shops, and chemical plants.

S&S Northern offers a comprehensive range of gas detection systems designed to meet the safety needs of various environments. Our selection includes multiple gas detection control panels, basic and advanced gas detectors with a variety of ancillary products such as emergency buttons, audible alarm beacons, and solenoid valves to create a complete and reliable safety system.

Whether you need gas detection for a boiler room, a refrigerant gas detection system in a chiller room, or protection against oxygen depletion in a hospital laboratory, S&S Northern has you covered.

Our gas detection products are designed to detect hazardous gases quickly and accurately, ensuring prompt response to potential dangers. With our extensive range of solutions, you can trust S&S Northern to provide the safety systems you need to protect your premises, personnel, and assets.

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• Normally Closed Screwed Gas Solenoid Valves: 1/2″ – 2″
• Normally Closed Flanged Gas Solenoid Valves: 2 1/2″ – 6″
• Normally Closed Water Solenoid Valves: 1/2″ – 2″

The gas solenoid valves can be mounted in a vertical pipeline or in a horizontal pipeline with the coil positioned uppermost.

GoldSeal Screwed Gas Solenoid Valves 1/2″ – 1″

Maximum working pressure: 360mbar

GoldSeal Screwed Gas Solenoid Valves 1-1/4″ – 2″

Maximum working pressure: 200mbar

GoldSeal Flanged Gas Solenoid Valves 2-1/2″ – 4″

Maximum working pressure: 200mbar

GoldSeal Flanged Gas Solenoid Valves 6″

Maximum working pressure: 1000mbar

To quickly calculate your GSV pressure drop, simply visit our pressure drop calculator, enter the pipe diameter and flow rate, then click ‘Calculate’.

Click here

Operating temperatures for all GoldSeal gas solenoid valve sizes are between 50°C-65°C.

• GoldSeal Screwed Gas Solenoid Valves: CE and EN161 certified. We also have valves ULC & KIWA listed.
• GoldSeal Flanged Gas Solenoid Valves: CE and EN161 certified.

The GoldSeal solenoid valve range by S&S Northern offers exceptional performance and reliability for both gas and water applications. Our range includes:

• Normally Closed Screwed Gas Solenoid Valves (1/2″ – 2″): Ideal for precise gas flow control, these valves are designed to stay closed when de-energized. They are accredited with CE and EN161 certifications, ensuring safety and compliance in various industrial and hazardous environments. We also have ranges that are ULC & KIWA listed.
• Normally Closed Flanged Gas Solenoid Valves (2 1/2″ – 6″): For larger applications, these robust valves provide reliable gas control. They also hold CE & EN161 certifications, making them suitable for high-demand atmospheres.

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The available sizes for GoldSeal Water Solenoid Valves are 1/2″ – 2″.

Normally closed type.

The valves are available in the following power options:

• 230V AC
• 24V AC
• 24V DC

The operating pressure range for GoldSeal Water Solenoid Valves is from 0.5 to 16 bar.

The operating temperature range for these valves is from 0°C to 120°C.

GoldSeal Water Solenoid Valves are WRAS & CE certified, ensuring they meet the UK standards for water safety and quality.

S&S Northern Ltd supply the GoldSeal range of water solenoid valves. Available from 1/2″ – 2″, in either 230VAC, 24VDC or 24VAC powered options. All valves are a normally closed type and are an off the shelf product.

Major water leak detection refers to systems designed to monitor water usage and detect significant leaks within a building. These systems help identify issues such as burst pipes or substantial leaks, providing early warnings through alerts. This early detection is crucial for preventing water damage, reducing waste, and maintaining efficient water management practices. An example of a major water leak detection product is the Merlin WDP.

BREEAM (Building Research Establishment Environmental Assessment Method) is an internationally recognized sustainability assessment method for master planning projects, infrastructure, and buildings. It evaluates the environmental performance of buildings and developments across various categories, including energy, water, materials, and indoor environmental quality. BREEAM aims to promote sustainable construction practices and improve the overall performance of buildings.

Major water leak detection systems typically relate to the following BREEAM credits:

BREEAM WAT 02

The aim of BREEAM WAT 02 is to ensure water consumption can be monitored and managed and therefore encourage reductions in water consumption.

To demonstrate compliance with BREEAM WAT 02 requirements:

A water meter is to be supplied to the mains water supply to each building. The water meter should have a pulsed output so the information can be monitored through a BMS (Building Management System.)

For one credit –

• Sub meters are to be fitted to allow the metering of individual water consuming plant or building areas, where demand in such areas will be equal to or greater than 10% of the total water demand of the building.
• Each sub meter has a pulsed output to enable connection to a BMS for the monitoring of water consumption

BREEAM WAT 03

BREEAM (BRE Environmental Assessment Method) is the leading and most widely used environmental assessment method for buildings.

BREEAM WAT 03 offers two credits in total both based around major water leak detection & water leak prevention.

A leak detection system which is capable of detecting a major water leak on the mains water supply within the building and between the building and the utilities water meter.

The leak detection system must have the following features:

• Audible when activated
• Activated when the flow of water passing through the water meter/data logger is at a flow rate above a pre-set maximum for a pre-set period of time
• Able to identify different flow and therefore leakage rates, e.g. continuous, high and/or low level, over set time periods
• The leak detection system must have the following features:
• Programmable to suit the owner/occupiers’ water consumption criteria
• Where applicable, designed to avoid false alarms caused by normal operation of large water consuming plant such as chillers.

Please note – Where it can be demonstrated that it is not physically possible for a meter to be installed on the pipework, the requirement for leak detection between the building and the utilities meter can be considered not applicable, and the credit awarded based on the leak detection within the building.

So long as the compliant system alerts the appropriate person to the leak so they are able to respond immediately, the assessor can judge if the aim of the issue is being met by a reliable, robust and fail-safe means of notification.

One of the following types of flow control device is fitted to each WC area/facility to ensure water is supplied only when needed

1. A time controller i.e. an automatic time switch device to switch off the water supply after a predetermined interval
2. A volume controller i.e. an automatic control device to turn off the water supply once the maximum pre-set volume is reached.
3. A presence detector and controller i.e. an automatic device detecting occupancy or movement in an area to switch water on and turn it off when the presence is removed.
4. A central control unit i.e. a dedicated computer- based control unit for an overall managed water control system, utilising some or all of the types of control elements listed above.

Please note – The criteria are applicable to the cold water supply only and include cold taps, WCs and urinals. Any solution implemented to achieve compliance with this Issue should effectively mitigate the risk of hot-water scalding in showers, in the event that the cold water supply is shut off.

A shut-off on the cold water supply to the whole WC facility provides a simple and effective way of reducing potential water loss. Taps which contain built in shut-off valves will not prevent any water leaks from the supply to the tap and so do not fulfill this intent.

S&S Northern offers a comprehensive range of water leak detection systems designed to protect your property and meet the stringent requirements of BREEAM certification. Our solutions are ideal for various settings, including commercial buildings, data centers, plant rooms, and toilets, ensuring early detection and control of water leaks to prevent damage and save resources.

BREEAM Major Water Leak Detection

Our major water leak detection systems are designed to help buildings earn BREEAM credits by meeting the standards for effective water management. These systems monitor your water supply for unusual activity, instantly detecting and alerting you to major leaks. This not only helps in conserving water but also in maintaining compliance with BREEAM criteria, ensuring your building is environmentally responsible.

WC Toilet PIR Water Control

Our WC toilet PIR water control systems are specifically designed to conserve water and earn BREEAM credits by controlling water flow in toilets. The system uses passive infrared (PIR) sensors to detect occupancy and automatically control the water supply to WCs, reducing water wastage and ensuring efficient use of resources.

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A physical water leak detection system is a specialized technology designed to identify and alert users to water leaks within a building. These systems use sensors to monitor areas for the presence of water and provide immediate notifications if a leak is detected. This helps to minimize water damage, reduce repair costs, and conserve water.

• 2-Core Water Leak Rope Alarm: Detects water leaks along the length of a rope, providing an effective alarm system for extensive areas.
• 4-Core Water Leak Rope with Fault Detection and Alarm: Features fault detection capabilities in addition to leak detection, ensuring reliable monitoring and alerting for critical applications.
• Water Leak Puck: Ideal for smaller applications, this compact sensor is effective for detecting leaks in localized areas.

Physical water leak detection systems are typically installed in high-risk areas, including:

• Basements and Underground Spaces: Where water damage can be extensive.
• Near Pipes and Plumbing Fixtures: To detect leaks before they cause major issues.
• Equipment Rooms and Data Centers: To protect critical equipment from water damage.
• Commercial Kitchens and Bathrooms: Areas with frequent water use and potential for leaks.

Yes, some insurance companies in the United Kingdom offer discounts if certain water leak detection systems and parameters are met (as of 04/09/2024).

1. Aviva
   • Details: Aviva offers discounts for properties with risk mitigation measures, including water leak detection systems. The exact discount may vary based on the level of coverage and the specific system installed.
   • Contact: For more details, visit Aviva Insurance.
2. RSA Insurance Group
   • Details: RSA provides potential premium reductions for properties with effective water leak detection and prevention systems as part of their risk management approach.
   • Contact: Check RSA Insurance for more information.
3. Zurich Insurance
   • Details: Zurich may offer lower premiums or other benefits for homes and businesses that have installed water leak detection systems. They value proactive risk management strategies.
   • Contact: Visit Zurich Insurance for more details.
4. Direct Line
   • Details: Direct Line sometimes provides discounts for homes with advanced water leak detection systems as part of their efforts to reduce claims related to water damage.
   • Contact: Visit Direct Line for more information.
5. Churchill Insurance
   • Details: Churchill offers various discounts and benefits for properties with modern risk management systems, including water leak detection systems.
   • Contact: More information can be found on Churchill Insurance.

How to Obtain Discounts

To secure a discount, follow these steps:

1. Install a Certified System: Ensure that your water leak detection system is certified and meets industry standards. Insurers typically look for systems that are recognized for their reliability and effectiveness.
2. Notify Your Insurer: Inform your insurance provider about the installation of the water leak detection system. Provide details about the system and how it works to demonstrate the added protection it offers.
3. Request a Review: Ask your insurer for a review of your policy to see if a discount can be applied. Some insurers may require proof of installation or a report from a professional installer.
4. Compare Quotes: It’s also wise to compare insurance quotes from different companies to ensure you are getting the best deal available for properties with water leak detection systems.

For specific details on discounts and eligibility, it’s best to directly contact the insurance companies mentioned or visit their websites to discuss your individual circumstances.

Yes, S&S Northern offers the Merlin WLMZ range of multi-zone water leak detection controllers. These controllers can monitor multiple WLM monitors for water leaks and will display a status indication i.e. alarm, zone 1.

• Merlin WLMZ2: A 2-zone water leak detection controller that supports up to 6 water leak modules (WLMs).
• Merlin WLMZ4: A 4-zone water leak detection controller that supports up to 12 water leak modules (WLMs).

Both models can be integrated with Building Management Systems (BMS), external alarms, and feature built-in status LED displays and audible alarms for comprehensive leak management.

S&S Northern’s standalone rope water leak detection systems are ideal for protecting areas prone to leaks, such as server rooms, plant rooms, and beneath raised floors. The flexible rope sensor can be laid along critical areas to detect even the smallest leaks, providing early warnings and allowing for quick action to minimize damage. Multiple zones can be monitored through our WLMZ controller range.

S&S Northern also supply puck sensors for drip trays and smaller applications. This system is essential for environments where water leaks could cause significant disruption or damage.

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The Merlin RS & IAQ range of CO2 monitors and air quality sensors offers several communications protocols to integrate with building management systems (BMS) and other monitoring systems. These include:

• Modbus: A popular protocol for industrial communication, Modbus allows for easy integration with various control systems.
• BACnet: This protocol is widely used in building automation and control networks, providing interoperability with other BMS components.
• Analog Outputs: For straightforward applications, analog outputs such as 0-10VDC or relays can be used for data transmission.

The Merlin RS & IAQ range offer various power options to accommodate different installation needs:

• AC Power: Typically 230V AC, suitable for standard electrical supplies.
• DC Power: Available in 24V DC for compatibility with low-voltage systems.

The Merlin RS range provides a variety of sensor options to meet different monitoring needs:

• CO2 Sensors: For measuring carbon dioxide levels in indoor environments.
• Temperature and Humidity Sensors: To monitor environmental conditions and ensure comfort and safety.

The Merlin IAQ range is our advanced room sensor, providing a wide variety of sensor options to meet different monitoring needs and to achieve RESET & WELL accreditations.

• CO2 Sensors: For measuring carbon dioxide levels in indoor environments.
• Temperature and Humidity Sensors: To monitor environmental conditions and ensure comfort and safety.
• VOC Sensors: To detect volatile organic compounds and assess overall air quality.
• Particulate Matter Sensors: For detecting airborne particles and assessing particulate pollution levels.

S&S Northern Ltd’s products, particularly the Merlin IAQ range, are designed to meet various environmental and health standards, including WELL and RESET:

• WELL Building Standard: Focuses on promoting health and well-being through indoor environmental quality. The Merlin IAQ products contribute to meeting WELL standards by providing accurate measurements of indoor air quality parameters, such as CO2, temperature, and humidity.
• RESET Standard: Emphasizes real-time monitoring and continuous performance measurement for indoor environmental quality. The Merlin IAQ sensors align with RESET requirements by offering real-time data on air quality parameters.

S&S Northern Ltd offers the Merlin RG refrigerant gas leak detector, specifically designed for VRF (Variable Refrigerant Flow) systems:

• Features:
  • Advanced Detection Technology: Detects a wide range of refrigerant gases to ensure early identification of leaks.
  • Real-Time Monitoring: Provides continuous monitoring of refrigerant levels, alerting users to potential leaks.
  • Integrated Alarms: Includes built-in audible and visual alarms to notify of detected leaks.
  • Connectivity Options: Can be integrated with BMS systems for remote monitoring and control.

S&S Northern Ltd offers a comprehensive range of products designed to enhance building safety, efficiency, and comfort, including:

• Merlin RS Range: CO2 and air quality monitors with various communication protocols and sensor options.
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• Merlin IAQ: Indoor air quality solutions that meet WELL and RESET standards.
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• Merlin RG: Refrigerant gas leak detectors for VRF systems.
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