water supply pipe size
Posted by Adam on January 19, 2003 at 08:48:57:
We are replumbing an old house that has 3/4" copper from the street (about 30 feet to the meter).

Total planned fixture units is 37 (3.5 baths plus hoses etc.).

Current meter is 3/4" x 3/4".

Is seems that we can change the meter to 3/4" (street side) by 1.25" and run 1.25 copper type L as long as we can in the house before we branch.

Also, does required anti-backflow valve and pressure reducer valve need to have 1.25" fittings to maintain flow/velocity etc. or can they be smaller?

Thank you in advance for any help.

Adam


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