I am in the UK, South west.
I am replumbing my garden tap since the nonreturn valve integrated
inside the tap is no longer working and the current regulations require
the valve to be inside the building anyways.
I have bought a double check valve from B&Q. Questions:
1. Can it bt fit in any position i.e horizontal or vertical. If vertical
is ok, is a downward direction of flow better than upward?
2. I am going to fit a stopcock inside to shut off the garden tap if
freezing is likely; should the double check valve be on the supply side
or the tap side of the stop cock? Any difference?
3. The plumbing branches off from a feed to a utility sink. I want to
incorporate an isolation valve before the sink. Do these valves affect
the water pressure too much (with the garden tap in mind)? Am I
I have looked for these information but no luck so far. The other
responses in this group are very good. *Any*
help from anyone will be