Hep20 T junction with 2 way valve??

[Richard10002]

I'm fitting a gas water heater to feed a shower, and would like the choice of feeding the shower from the calorifier, or from the gas water heater, but I dont want the gas water heater to feed the whole boats' hot water system.

The idea is to tee into the HEP20 pipe near the shower tap, and I could probably fit two ball valves, but this would mean that, if I left both open, the gas water heater could feed the whole system.

Is there a plumbing T or Y junction with a valve which will let water come from either source, but not both?

I can visualise a "flap" which can close either source, whilst leaving the other open. I guess this could also be done by twisting a valve with a 90 degree hole in it.

Hope this makes sense!

Many Thanks

Richard

 

[Talbot]

I have seen a copper Y junction with two gate valves probably in ASAP.

 

[Double arvor]

you could fit a non return vavle, for which will go with hep

 

[gardenshed]

Fit a one way valve on the feed from the calorifier so that the gas heater supply cannot go back down that leg of the pipework. I think Hep2o have one on their catalogue or Cleghorn Waring can advise.