I have currently 1/2 inch branches running into 6 shower jets. However, the upper jets don't get enough water deployment. Would changing the branches 1/2 inch to 3/4 inch pipe make difference?
Plumbing – Will increasing the size of six shower head branches improve flow
pipeplumbingshower
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Best Answer
Probably not. You'd still be limited by the bottleneck in the system which is the half-inch supply line. It depends on how it's branched, though. If you can fit a manifold such that no branch is downstream of another you might see some improvement. In that case I wouldn't use 3/4" pipe. You'd see no benefit.