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

    Jan 2, 2009, 11:54 AM
    Check valve parts
    I have a 3/4 inch check valve on my hot water heater. It has a threaded top and a small side screw. My question is, do these go bad? What is the small screw for? What is the top access bolt for? I am getting hot water back flow through my cold water pipes. I can't get the top ov the valve off to see if it is working properly but if I take the small screw out no water leaks out. Thanks
    letmetellu's Avatar
    letmetellu Posts: 3,151, Reputation: 317
    Ultra Member
    		  
    #2

    Jan 2, 2009, 08:26 PM

    The big nut on top is for you to replace a "gate" inside, this is what makes it a check valve, the gate seats against a brass seat.

    The nut on the side is to unscrew the shaft that the gate swings on. I am not sure that you could find anywhere to get the parts that you need, except the manafacture. You might find them on the internet.
    Milo Dolezal's Avatar
    Milo Dolezal Posts: 7,192, Reputation: 523
    Plumbing Expert
    		  
    #3

    Jan 3, 2009, 12:13 AM

    I bet you it will be much cheaper, and faster, to replace the check valve rather than look for replacement parts. I have never even seen replacement parts in store offered for sale.
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