Valves - Hydraulic WRAS approved hydraulic water management devices that comply with Bylaw 82 and 83
Standard (STD), low pressure (LP) and high sensitivity low pressure (HSLP) types
Replace trickle - cock in the supply pipe to the cistern
Work by detecting slight changes in water pressure caused when washroom facilities are used
Pass a pre-set amount of water per operation
Stop filling the cistern when the building is empty