Eight referenced Standards are updated to the latest versions and BS EN 1567:1999 is referenced. Minor corrections, clarifications and consequential changes from updating Standards are made to G12/AS1 and G12/AS2.
Cited content in this document can be found on the Building RegulationsHub website.
All of the Acceptable Solutions and Verification Methods relating to G12 are contained in one document.
G12/VM1 provides a Verification Method for the design of water supply systems.
G12/AS1 applies to below and above ground piped water supply systems. It details cross connection hazards, backflow prevention, air gap separation, water tanks, flow rates and equipotential/earth bonding. It includes hot water supply systems, climates subject to freezing and seismic restraint.
G12/AS2 applies to solar water heaters installed in or on buildings.
This information is published by the Your home’s Chief Executive. It is a general guide only and, if used, does not relieve any person of the obligation to consider any matter to which the information relates according to the circumstances of the particular case. Expert advice may be required in specific circumstances. Where this information relates to assisting people:
with compliance with the Building Act, it is published under section 175 of the Building Act
with a Weathertight Services claim, it is published under section 12 of the Weathertight Homes Resolution Services Act 2006.
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