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    russell1975's Avatar
    russell1975 Posts: 1, Reputation: 1
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    #1

    Jan 3, 2012, 06:56 PM
    Water pressure problems
    Tested the pressure at the hose bib,and my water pressure is 110. If the pressure is so high, why do I have such a significant pressure drop when I flush a toilet?
    Marine121's Avatar
    Marine121 Posts: 4, Reputation: 1
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    #2

    Jan 3, 2012, 07:29 PM
    You most likely have bad valves some where or there is a problem in the water differebtial exchange system.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #3

    Jan 3, 2012, 09:00 PM
    A home with 110 psi would normally have a pressure reducing valve (prv) does you home have one, it could be malfunctioning.
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #4

    Jan 4, 2012, 06:42 AM
    How old is your home and what material are the water pipes? Copper, plastic or galvanized?
    Bob's asking about a PRV valve,(see image). This PRV valve will be found where the water enters your home. Do you have such a valve installed?
    110 PSI is over twice the average house PSI of 45 PSI. At 110 PSI this puts a strain in fittings and faucets.
    why do I have such a significant pressure drop when I flush a toilet?
    If I had to guess I would guess old galvanized pipes that are choked with rust that's cutting down the volume. You're simply running out of water and with that comes a loss of pressure. Does that sound correct to you? Let me know, Tom
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