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    nixman121's Avatar
    nixman121 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Nov 19, 2009, 05:25 PM
    Low cold water pressure throughout the house
    What would cause me to have low cold water pressure throughout the entire house but the hot is fine? And how can I fix it?
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Nov 19, 2009, 06:09 PM
    The first thing we must know is your house pressure. How old is your home and what material are your pipes? Copper, Plastic or Galvanized? Pump or city water?
    Do you get full pressure out of your outside hose bibs? Let me know, Tom
    nixman121's Avatar
    nixman121 Posts: 2, Reputation: 1
    New Member
    		  
    #3

    Nov 19, 2009, 07:22 PM
    I don't know what you mean by house pressure, the house is over 200 yrs old, the pipes are galvanized to copper and I have city water. And I get full pressure outside.
    ballengerb1's Avatar
    ballengerb1 Posts: 27,378, Reputation: 2280
    Home Repair & Remodeling Expert
    		  
    #4

    Nov 19, 2009, 07:28 PM

    Lets start with basic principals of hydraulics. The pressure for your hot water is created by the pressure of your cold water entering the water heater. So we now know that you do have, must have, good cold pressure at least at your water heater. Somewhere further along the line you must have a restriction in a main cold supply line, a big restriction. Not uncommon in very old galvanized pipes. I would start by replacing as much galvanized supply line as you can afford
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