When installing something which will carry or receive water through the public mains water supply in great britain, it is a criminal offence if it doesn't comply with the Normal water Supply (Water Fittings) Regulations or Scottish Byelaws. These require than a water fitting should possibly not cause waste, misuse, undue consumption or contamination belonging to the water supply and need to be ‘of an appropriate quality and standard’.
The Regulations can be in effect between the boundary of your property and the position of discharge as illustrated below. WRAS Approval is an effective way to demonstrate compliance as it is granted directly by representatives with the water suppliers and is definitely therefore accepted by every water supplier in great britan.
WRAS Fitting Approval: Whole products just like valves, boilers & showers go through mechanical and water quality testing. This type of acceptance demonstrates full compliance with requirements on the regulations and byelaws, provided the fitting is installed reported by any conditions given with all the approval.
WRAS Material Endorsement: Non-metallic materials & elements, such as rubber published material & ‘O’ extra, undergo testing only for his or her effects on water level of quality. This type of approval demonstrates that this non-metallic material/component does not itself contaminate water and therefore satisfies this type of requirement of regulations as well as byelaws.
https://www.worldsvalve.net/WR....AS-Butterfly-Valve-p
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