cpvc manifold

[schererx]

I like the idea of using a manifold to keep the pressure equal to all fixtures. I was wondering if a manifold could be fashioned out of cpvc using tees instead of using PEX.

[master plumber mark]

you could in theory do that ...

but it would probably be a god awful mess and
just a nightmare to get all that rigid pipe configured
down into that manifold

pex looks pretty rough and ususally is run in tight bundles
throughout the house to feed to all the fixttures,

doing that with cpcv , would be possible if you got lots
and lots of room

[schererx]

This would be done in a fairly small house with not a lot of pipe to run. I was planning on starting from the manifold and working my way toward the fixtures.

[hj]

It is the size of the pipe, not the manifold that gives you equal pressure. A manifold with short runs and very long ones will also produce unequal pressures unless you use the proper sized pipe for the long runs. If you install the CPVC using adequate pipe sizes, allowing for the fact that ALL cts plastic pipes have a smaller "hole" than copper tubing, then your only pressure problems will be due to the inertia of the water when an additional faucet is first opened. And inertia will be a factor regardless of whether you use a manifold or not.