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Old 11-05-2007, 09:43 PM   #1
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pressure drop


Master bath shower pressue is weak. Regulator is set at 80 psi. Pressure gauge on outside faucet ranges from 40psi to 80psi due to city water pressue. I took reading outside and had 50psi and went to the master shower and got a 15psi reading. The kids shower had a 40 psi reading. Both baths are on 2nd level. Suggestions?

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Old 11-05-2007, 10:28 PM   #2
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Hows the lav in the master? Single handle valve in the shower? Remove the cover plate and if you have stops, check them, make sure they are open. If problem still persists shut water off take valve apart and look for foreign substance. How did you do the pressure test in the bathrooms?

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Old 11-06-2007, 04:17 AM   #3
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Did not check pressure on sinks but they seem to have plenty of pressure. Yes the shower is a single handle, Moen positemp. I don't know if I checked pressure correctly but I replaced the shower head off with the pressure gauge and turned on the shower.

I will take faucet apart tomorrow. Pulled diagram of moen webpage. I haven't done that before any thing to watchout for?

Last edited by grgree; 11-06-2007 at 04:40 AM.
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Old 11-06-2007, 08:56 AM   #4
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Don't loose OR break the clip holding the cartridge in place!! I'm sure you'll be fine.
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Old 11-06-2007, 09:17 AM   #5
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10 psi drop is about right for the 2nd floor. Pressure drops about 10 PSI per 10 feet of elevation.
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Old 11-06-2007, 02:09 PM   #6
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So I do have have an issue in the master bath with a 35 psi drop. I will check out the faucet and see if that corrects it.

Thanks,
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Old 11-06-2007, 10:26 PM   #7
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Chris:

Bought a replacement cartridge to put in. After I removed the older one noticed that the rubber gromlet on the cold water side was stopping up the opening, blocking the flow. Removed blockage and replaced with new cartridge. The pressure is the strongest it has ever been.

Thanks,

Gary
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Old 11-06-2007, 10:57 PM   #8
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See just a little diagnosis and checking and the problem is fixed. your welcome - go take a shower now

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