Currently plumbing a 20" rain shower (droplets + water fall). Using it with a water pump/booster.
The valve that comes with it has two 1/2" inlet which consists of cold + hot water so it's basically a 3/4" feed.
It however only has one 1/2" outlet.
So my question is does it help if i connect 3/4" pipe to that outlet after using reducer coupling? In this sequence:
Outlet > 1ft of 1/2" pipe > 10ft of 3/4" pipe > Rain Shower
I know bigger pipe helps with friction but it's of no concern here as the distance is short.
My concern is more on whether this arrangement will produce a 3/4" water flow instead of a 1/2" water flow and whether i should just go fully 1/2" in order to avoid wasting hot water that are sitting in the pipe since the flow of the said arrangement is just going to be the same as a 1/2" flow.
Thanks.
Best Answer
The hot/cold mixer valve and/or the 1/2" valve outlet make installation of 3/4" pipe, downstream on the run to the shower head, unnecessary; you will have no appreciable benefit from this. Also, I imagine that your "rain shower" unit has a 1/2" inlet (although you don't mention this).
Your concern about "wasting hot water" doesn't make sense to me; your proposed pipe size increase is after the hot and cold mixer...