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Old 03-23-2012, 02:11 PM   #16
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Best PSI for full house plus tenants


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Originally Posted by psilva8 View Post
If you have upgraded water lines in the house that have been properly sized, and are still have issues running more than 1 fixture than the issue will probably be with the incoming water supply. Are you on city water or well water? Remember that 49 psi is likely a static pressure and is adequate for residential use. If municipal, call the city and see what size your service is. Ask when the last time it was replaced. Ask what kind of material it is. This will give you more clues to the problem.
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Originally Posted by anuvanoob View Post
What additional info is needed?
I've quoted my first post for reference.

It's possible the service coming from the watermain is galvanized or lead. If that's the case it could be the size of a pencil inside.

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Old 03-23-2012, 02:57 PM   #17
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Best PSI for full house plus tenants


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Originally Posted by psilva8 View Post
I've quoted my first post for reference.

It's possible the service coming from the watermain is galvanized or lead. If that's the case it could be the size of a pencil inside.
I believe your assumptions are correct.
I also ran a quick, off the cuff water pipe sizing- @ 46-60 psi range, the service will be best if upgraded to 1" with 1" building supply. Again, this was a quick guess based on the fixture count in OP's opening post
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Old 03-25-2012, 02:16 AM   #18
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Best PSI for full house plus tenants


Well I unclogged or replaced the fixtures in my home and now I get outstanding pressure from all fixtures even when they're all running at the same time. I guess the problematic fixtures made the pressure appear much worse than it actually was. Having washer on in the basement does decrease the pressure on the main floor fixtures but not significantly.

The pressure does get dramatically worse again on any of the main floor fixtures when the utility sink is on. I assume that's because the utility sink is at the bottom of the water system and releases so much pressure plus it doesn't have a reducing method like the kitchen and bathroom fixtures. I guess this is to be expected.

Looks like 49 PSI may be good enough after all. Just barely I bet.

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