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    maccad's Avatar
    maccad Posts: 5, Reputation: 1
    New Member
    		  
    #1

    Nov 27, 2006, 06:46 AM
    Pressure balance valve
    Dear All

    I need to know about the principle of function of the pressure balance valve used in North America and Canada. I think it's only advantage is to keep the water pressure coming out for the faucet constant, but how does it do it?

    What is the inner component responsible of implementing such function and how does it work?

    Best Regards
    speedball1's Avatar
    speedball1 Posts: 29,301, Reputation: 1939
    Eternal Plumber
    		  
    #2

    Nov 27, 2006, 01:00 PM
    You're referring to a PRV, pressure regulating valve and that's exactly what it does. Some water mains have the operating pressure set up high to maintain pressure in the outlaying areas. However, this puts the pressure in the homes closer to the pumping station too high for household use. A PRV is installed to lower the pressure coming in from the main to a usable one. Contrary to popular belief a PRV will mot increase your pressure, only lower it. It's like having a valve and only opening it a little ways to lower the amount of water.
    Regards, Tom
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