Do you need a double check valve on outside tap?
A double check valve is required at the incoming supply and on any outside tap (because of the risk of back contamination from a hose etc into the potable supply).
What is outside tap with double check valve?
You can get outside tap kits with a built in check valve . They prevent back siphonage not water freezing. For example some people may have a hose attached to it and they leave it in a bucket, that water in the bucket could siphon up the hose and into your water supply…. Double check valves prevent that.
What is the difference between a check valve and a double check valve?
A single check valve can be used for fluid category 2 protection, where there may be an aesthetic change such as temperature, taste or odour. A double check valve is used for fluid category 3 protection, where there is a risk of substances of low toxicity such as common disinfectants.
Where do you fit a double check valve?
Place the Double Check Valve within 2 feet of the meter box, (See note 5.1 below). 2.2. A tee with a ball valve is required before you install your double check valve. This is to ensure a continuous water supply to the residence during a leak or mechanical breakdown of the sprinkler system.
Where is a double check valve used?
Double check valves are specifically designed to protect water supplies from contamination and are used to safeguard the water supply to millions of domestic and nondomestic properties nationwide.
Where do you put a double check valve?
Does an outside tap need a check valve?
“A Check valve is a non return valve, it is essential to have this fitted to an outside tap to stop the possibility of back flow and potentially contaminated water from outside re entering the potable water in your taps.”
Does a check valve reduce water pressure?
Check valves do not reduce pressure, they actually help maintain it. In the setup you describe, it might work. However you will DEFINITELY need another check valve on the outlet of the tank to prevent the high pressure flow from backwashing in through the bottom, since there is no shuttoff/float valve there.