Pex fitting and reduced flow ??

ScottMP

with plumbing but also with heat.

How many of you look at the reduced flow flow through a pex fitting. We are doing a custome house and ran 1/2" pex to the rain shower head. When you look at the size of the fitting opening its quite small and to make sure htis is'nt an issue we have changed them to 3/4".

Scott

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singh

Scott

Uponor propex expansion fittings are nearly full size. I only use Uponor.

The other pex systems are smaller i.d.

For a shower head 2.5 gpm, you should be ok with 1/2" back to a manifold, very little connections to make.
For high end tub fillers @ 8 gpm I go up to 3/4" .

I think the fittings have a Cv value also, and have more to do with PSI.
Ever ponder faucet connections , and look into supply tubes, very small

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Wild Rover

Pex

Scott, I always increase the size to large volume showers and shower heads when using pex. What scares me more than the tubing is the size of the fitting which is much smaller than 1/2" tubing. Whan I am installing multiple shower heads, body sprays and similiar fixtures I still run full size 3/4" copper. It may cost more than pex but i'm not interested in replumbing a high end shower system that has reduced flow.

hot_rod

pressure drop charts

would help with the piping drop, and unless you have an waful lot of fittings between the source and the shower that pressure drop shouldn't be an issue.

But pex id is smaller then copper if you are using CTS pex.

Another reason to look into the Manablock system for custom homes.

Typically a pex job should have fewer fittings then a copper job piped with 20 foot lengths.

High gpm requirements would need larger piping, keeping in mind the time to purge those lines. Re-circ will be a must.

hot rod