1/2 inch pipe coming into house, 3/4" inside--makes sense???

Old 05-18-11, 08:49 PM
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1/2 inch pipe coming into house, 3/4" inside--makes sense???

Does it make sense to put 3/4" copper pipe inside the house if the pipe coming into the house from the main is only 1/2"? My contractor just did this. He says the 3/4" pipe will enable us to store more hot water in pipes. Is this true?? Any thoughts??
Old 05-18-11, 08:53 PM
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Yes you will get more volume. I probably may have ran a 1" trunk line then branched off 3/4" arms then 1/2" to fixtures.

If you had all 1/2" and ran two showers you would detect lower pressure at the heads then if only one was on. Then have someone flush a toilet and you get a trickle. Not enough water.

Run the pipes in the home larger and you will get more GPM.

A larger diameter pipe will have a greater flow or GPM than a smaller pipe at the same pressure or flow rate.

It has nothing to do with hot water being stored per say.

What work did you do?

Mike NJ

Last edited by lawrosa; 05-18-11 at 09:16 PM.

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