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    Schoma's Avatar
    Schoma Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 26, 2011, 06:40 PM
    Occasinal tpr relief valve leaking?
    Tpr valve occasional drips water. I have a well
    hkstroud's Avatar
    hkstroud Posts: 11,929, Reputation: 899
    Home Improvement & Construction Expert
    		  
    #2

    Jan 26, 2011, 07:05 PM

    What is well pump pressure setting? Do you have a check valve between well tank and house?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #3

    Jan 26, 2011, 09:22 PM
    There are only two reasons for a discharge. They are overtemp and overpressure. When TPR valves age, the spring weakens and they will open below the set pressure. Check temp 125+/-and water pressure 40-60psig and if they are in line, change the TPR.
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #4

    Jan 27, 2011, 07:17 AM

    HI guys...

    Brian, there is another reason... called a CLOSED SYSTEM where backflow preventers, pressure regulating valves and check valves create a closed system that won't allow for the expansion that a water heater creates on water and will usually relieve the excess pressure by relieveing it through the T&P valve.

    The answer in these "closed system" setups is to install an EXPANSION TANK in the cold water supply... see image.

    With that being said, I can't be sure this is the issue for SCHOMA as we need to know if there are check valves or other valves I mentioned above in place in his system.

    At a minimum, I would definitely replace the T&P valve, for sure!

    Will check back later!

    Mark
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    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #5

    Jan 27, 2011, 03:06 PM
    Comment on massplumber2008's post
    Good call, Didn't think about that since I rarely see one without an expansion tank.
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