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Thread: Water hammer

  1. #14
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    Quote Originally Posted by alcomech View Post
    Turn off as many fixtures at there shut offs located under the sinks, cabinets, etc. and see if there is a fixture in particulate which is suspect.
    Good call.

  2. #15
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    Check your incoming water pressure. Does that tank have heat traps on it? I have seen them cause this type of issue before. With the fast close valve on the fixtures and appliances and the traps it will cause water hammer issues.


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  3. #16
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    What's a "heat trap"?

  4. #17
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    Quote Originally Posted by LKJoel View Post
    What's a "heat trap"?
    They are a galvanized and plastic nipple with a check valve. You would make your piping connection them with a female adapter. They are there for energy efficiency.


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  5. #18
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    Quote Originally Posted by qwerty hvac View Post
    They are a galvanized and plastic nipple with a check valve. You would make your piping connection them with a female adapter. They are there for energy efficiency.


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    Would it be obvious to spot on the tank?

  6. #19
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    Tank is a GSW
    MOD#: 6G50NVH-FV-02
    50 Gal 38,000 BTUH
    Don't see anything unusual,

    I did try giving it a good hot flush, no improvement

  7. #20
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    It should have heat trap nipples, most do. Did you use dielectric unions to connect to the piping?

  8. #21
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    Quote Originally Posted by AccurateHT View Post
    It should have heat trap nipples, most do. Did you use dielectric unions to connect to the piping?
    No, just 2 x 3/4" male pipe threads on the top of the tank, I connected with 2 copper female adapters

  9. #22
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    The male stubs could be heat trap nipples, if you sweat the adapters while threaded on to the stubs they could have melted. Around here we are required to install dielectric unions or similar (i.e. brass transition fittings).

  10. #23
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    You moved the tank from the middle of the house. If the water lines coming down to it when it was in the middle were fairly long. they may have been absorbing the shock. And when you eliminated that drop, you removed the shock absorption ability. Just a WAG.
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  11. #24
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    Quote Originally Posted by AccurateHT View Post
    The male stubs could be heat trap nipples, if you sweat the adapters while threaded on to the stubs they could have melted. Around here we are required to install dielectric unions or similar (i.e. brass transition fittings).
    I definitely know better than that. I sweat the adaptor, short length of pipe and valve together before attaching to tank.

    But it's still worth pulling and inspecting

    Are they typically removable?

  12. #25
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    LKjoel what part of ontario you from?

  13. #26
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    Quote Originally Posted by LKJoel View Post
    Are they typically removable?
    Yeah their just regular pipe nipples with plastic centers. Like anything factory installed there gonna be tight!

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