BREEAM WAT 03 Major Water Leak Detection Systems

BREEAM WAT 03 Major Water Leak Detection - WG1, WG2 and BCCB Systems

Major Water Leak Detection Systems To Achieve BREEAM WAT 03 Credit

Thorne & Derrick UK can provide a major water leak detection system specifically designed to meet the requirements for BREEAM WAT 02, WAT 03 and WAT 04 certification.

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

BREEAM sets the standard for the best practice in sustainable design and is used to describe a building's environmental performance.

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BREEAM WAT 03 Major Water Leak Detection Aims

The aim of BREEAM WAT 03 is to reduce the impact of major water leaks that may otherwise go undetected.

To demonstrate compliance with BREEAM WAT 03 requirements:

  • A leak detection system capable of detecting major leaks on the water supply must be installed. The system must cover all mains water supply between and within the building and the site boundary.
  • The leak detection system is to provide an audible alarm when activated. 
  • The system is to be activated when the flow of water passes through the water meter or data logger at a flow rate above a pre-set maximum for a pre-set period of time.
  • The leak detection system is to be able to identify different flow and therefore leakage rates e.g. continuous, high and or low level, over set time periods.
  • The detection system is to be programmable to suit the owner or occupiers water consumption criteria.
  • Where applicable, the leak detection system is to be designed to avoid false alarms caused by normal operation of large water consuming plant such as chillers.

BREEAM WAT 03 Major Water Leak Detection Products

Thorne & Derrick can provide a water leak detection system designed specifically to meet BREEAM WAT 03 requirements.

The leak detection system will monitor the flow rates of water entering a building from a site boundary and raise an audible alarm if the flow rate deviates from pre-set parameters. The system can be linked to a BMS and can also be used to shut off the water supply if required.

The leak detection system comprises of a two-zone WG2 Control Unit which is linked to two turbine sensors. Alternatively two single zone WG1 or BCCB Control Units can be linked with two turbine sensors.

The first water turbine is fitted just after the utilities water meter and will monitor the flow rate of mains water pipe feeding the building.

The second turbine should be fitted just after the stop-cock inside the building to monitor for leaks within the building.

The turbines provide a 'pulse' as water flows through them. Should the adjustable pre-set quantity of pulses/litres be exceeded, the leak detection system will provide local audio-visual alarms, and the output relay can provide a signal to remote alarm or BMS.

If required, the system can also shut off the water supply via the optional latching solenoid valves. The control unit can be programmed to suit varying occupancy levels throughout a 24 hour / 7day period.

Our system exceeds requirements of BREEAM WAT 03 criteria and will help enable the awarding of BREEAM credit point(s) for major water leak detection.

Systems are available to suit a variety of pipe sizes from 15mm - 200mm.

Please contact one of our estimators (who are fully conversant with BREEAM WAT 03 criteria), for a quotation or further information and advice on which system you require.

The BRE Group strive for continual innovation and as a result, set criteria to achieve credit points may change. Please contact a member of Thorne and Derrick or visit for the latest information. 

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BREEAM WAT 03 Major Water Leak Detection Systems

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