in the absence of a push fit these have copper washes good for plastic.
It is ok. Does restrict the flow rate quite a bit. But WRAS says you got to have em. They’re all much the same.
Fitted it to the supply side of a shower pump. Stopped the hot water heating up the cold tank.
Less expensive than the all plastic equivalents, but perfectly suited for the job. Easy to fit onto 22mm copper pipe with a couple of adjustable spanners. If used outside, it'll need insulating against frost.
Good product at a Good price which is WRAS. approved
Good solid brass double check valve
