Pipe size asnd pressure questions/
Posted by Barry Larkin on May 10, 19100 at 17:38:06:
I just bought an old victorian house,it has a well system,I have no info on the well pump,it has a 1" outlet on the pressure tank
and the gauge reads 40 psi.

Currently there is 3/4" cpvc cold water feed that goes about 30 feet to a crawl space beneath the kitchen floor where it is
reduced to 1/2" which feeds the old kitchen sink, then goes up to the bathroom above feeding the toilet,sink,and shower. There
is 1/2" line feeding to and from (about 50') the gas hot water heater.

In the old kitchen I will be keeping the sink and adding a washing machine, and feeding a sink and dishwasher in the new
kitchen on the other side of the wall from the existing sink, as well as the batroom above.

What is the proper way to feed this setup, to get proper pressure and volume?

Should I run a 1" cold main to the old kitchen, then feed all the fixtures with 1/2", or will a 3/4" main sufice?

Should I extend the 1" or 3/4" main up to the bathroom?

Should I replace the 1/2" hot water main with 3/4" (there are 3/4" fitting on the water heater)?

P.S. I will be installing and aeration/carbon filter for hydrogen sulfide removal after the pressure tank, if this would affect
pressure figures?

Any advice would be greatly appreciated.

Thanks, Barry Larkin


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