- September 27th, 2018, 1:51 am
#5107
I am wondering if an outside tap is installed without built in check valves, is an existing double check valve above the main stopcock good enough, - or must the supply pipe to the tap have a check valve?
My thinking is the existing check valve will prevent back siphonage into the underground mains supply.
And a back siphonage to the house mains taps etc, is highly unlikely unless a garden hose was to be above the height of house taps.
But I guess “highly unlikely” does not prevent regs
My thinking is the existing check valve will prevent back siphonage into the underground mains supply.
And a back siphonage to the house mains taps etc, is highly unlikely unless a garden hose was to be above the height of house taps.
But I guess “highly unlikely” does not prevent regs