what could cause low water pressure?

Profile picture for rabbit0860
we just bought this 9 years old 4 bdr 2 story house in mason and the overall water pressure is so low during the inspection that the second level shower only trickle some water drops. we had a plumber came in and he quoted $400 for replacing the valve and $400 for replace the faucet.

it was a well maintained house, can;'t believe the prior owner will live in a house without shower water. what could cause the low water pressure problem? the house valve in the basement is turned on. could it be something else that they did  to winterize  the house?  don't   trust the plumber.
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June 02 2009 - Mason
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Answers (4)

Profile picture for wetdawgs
Water pressure issues can be from several sources:

1.  What is the inlet pressure?  Is everything else fine for pressure?

2.  What is specifically going on with the shower?   For example, if you remove the shower head do you get okay pressure?  If that is the case, the little holes in the shower need unclogging (soak in a demineralizing solution available at the hardware store).     The clogged holes in the shower head are very common problem even in moderately hard water areas.  I had a shower that had to be declogged every three or four years, while all other showers were fine.

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June 03 2009
Profile picture for Anthony Saunchez
Another simple cause could be a partially open or clsed valve possibly the gate valve where your water supplier shut the water on or off.
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June 02 2009
Profile picture for penny_in_heels
If the water is very hard, you could have scale build-up in the pipes (copper?).

Is it public water or from a private well?

Also - how is the pressure on the ground floor and at the outside hose bib?  Also low?
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June 02 2009
Profile picture for fyrmaster
I had the same problem when I moved in my place. Just above your water shutoff you should have a pressure regulator. This knocks down the pressure coming in from the street to a pressure your house plumbing can handle. There should be a notched end that allows you to either allow more pressure to come in or reduce it.  Just try messing with that until you get the pressure you are looking for.  Good luck.
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June 02 2009
 

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