supply line sizing

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apparentgenius

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Hi,

I am in the process of plumbing a new house with PEX. I have a 1" main coming into the house.

Is there a limit of how many 1/2" fixture supply lines that I can take off of a a 3/4" branch off of the main? My total fixture units on the second floor is 23 made up of 4 sinks,2 toilets, 1 tub, 2 shower heads 1 washer, 1 dishwasher.
The distance from the 1" supply line to the furthest fixture is about 30'

Any help is appreciated.

glen

https://terrylove.com/watersize.htm
 
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apparentgenius

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Hi Plumber Jim,

The water company says that my pressure is 65 psi at the meter. If that's the case, can I feed all of that with a 3/4" line? I'm planning on using the 1" copper ported manifolds, 3/4" inlets, 1/2" outlets.

Thanks,

glen
 
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