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Yes - either a larger hot water tank, or we'll have to take very quick showers! Thanks again.

I should have explained - I didn't have the actual shower heads on the outlets, just a goose neck. (One shower head is still on order.) I'm more concerned that I won't have enough flow, so I wanted to check before we go any further in the remodel. Is 4 gpm for each when on separately and 3 gpm...

Our new shower will have a fixed shower head and a handheld, with a thermostatic valve and separate volume controls so that the shower heads can be used separately or at the same time. Both shower heads are rated at 2.5 gpm. We did ten-second flow tests and got 4 gpm at each outlet when turned...

Sorry - I believe they are 1/2" fittings. The inside diameter that fits into the Pex is 3/8". I don't have plumbing experience, so help is appreciated. Thanks

So I guess the question is, should we make changes, and if so, what should we do? Taking a closer look, what we have is: Both hot and cold water supplies are 1/2" copper, transitioning to 1/2" Pex. For both the hot and cold water 1/2 Pex lines, there is one 3/8" elbow halfway to the...

Thanks - are you saying that if we only use either the shower head or the handheld at any one time, this setup would be OK, even with the 3/8" elbows? In order to be able to use both at the same time, would we need 3/4" Pex and 5/8" elbows? Does using elbows cause any problems - further reducing...

Our alcove-type shower will have a fixed shower head and a handheld on the right wall, and controls on the left wall. The valves used are a Grohe universal rough-in (35 026) with a thermostatic control (19 865) and two separate volume controls (rough-in is 29 273 and trim is 19 182) for the...