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  1. #1
    Stephen G Sheldon's Avatar
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    Default TPR Valve Queastion

    Attached is a connection to a TPR valve. My question is whether or not the valve shown in the picture is legal or proper. It is my undersatnding that there are to be no valves connected to a TPR. Anyone know the answer?

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  2. #2
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    Default Re: TPR Valve Queastion

    No way. No how. Plus, the drain pipe isn't allowed to go up, which it seems to be doing.

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  3. #3
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    Default Re: TPR Valve Queastion

    John
    Don't be so sure, Georgia has some amendments that address this.

    SECTION 504
    SAFETY DEVICES
    *Revise Section 504.6.1 ‘Discharge’ of the Georgia Amendments revised January 1, 2002 and rename ‘Relief discharge.’
    504.6.1 Relief discharge. The relief valve shall discharge full size, separately to a safe place of disposal such as a concrete floor, outside the building, an indirect waste receptor, or other approved location. The discharge shall terminate in a manner that does not cause injury to occupants in the immediate area or structural damage to the building. The discharge pipe shall not be trapped. When the relief valve discharge piping goes upward a thermal expansion control device shall be installed on the cold water distribution or service pipe in accordance with Section 607.3.2 (GA Amendments). Provisions shall be made at the low point to drain the trapped portion of the discharge pipe.
    (Effective January 1, 2005)

    I'm not sure if that amendment is still in use.


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  4. #4
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    Default Re: TPR Valve Queastion

    At least its not a deadly as this home made IED !!!

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  5. #5
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    Default Re: TPR Valve Queastion

    Quote Originally Posted by Rick Cantrell View Post
    ...The discharge pipe shall not be trapped....Provisions shall be made at the low point to drain the trapped portion of the discharge pipe.
    Whaaa?

    "There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
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  6. #6
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    Default Re: TPR Valve Queastion

    Originally Posted by Rick Cantrell
    ...The discharge pipe shall not be trapped....Provisions shall be made at the low point to drain the trapped portion of the discharge pipe.

    Whaaa?

    Hey, I didn't write it, I just posted it!

    ' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

  7. #7
    Lawrence Transue's Avatar
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    Question Re: TPR Valve Queastion

    No question this is incorrect.

    Assuming a home owner installed this, it would be interesting to ask them what they were thinking?


  8. #8
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    Default Re: TPR Valve Queastion

    Lawrence
    Not so fast.

    John
    I found the current version of the amendment

    504.6 Requirements for discharge piping. The relief valve shall discharge full size, separately to a safe place of disposal such as a concrete floor, outside the building, an indirect waste receptor, or other approved location. The discharge shall terminate in a manner that does not cause injury to occupants in the immediate area or structural damage to the building. When the relief valve discharge piping goes upward, a thermal expansion control device shall be installed on the cold water distribution or service pipe in accordance with Section 607.3.2. If the discharge pipe is trapped, provisions shall be made to drain the low point of the trapped portion of the discharge pipe.
    (Effective January 1, 2007)


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  9. #9
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    Default Re: TPR Valve Question

    Quote Originally Posted by Rick Cantrell View Post
    If the discharge pipe is trapped, provisions shall be made to drain the low point of the trapped portion of the discharge pipe.
    (Effective January 1, 2007)

    Rick,

    My reading of that does not allow a valve there, it requires "provisions shall be made to drain" the low point, i.e., the low point "shall" have an always open drain line attached which drains to (where?).

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  10. #10
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    Default Re: TPR Valve Question

    Quote Originally Posted by Jerry Peck View Post
    Rick,

    My reading of that does not allow a valve there, it requires "provisions shall be made to drain" the low point, i.e., the low point "shall" have an always open drain line attached which drains to (where?).
    Well then it would not be a trap, it would be a drain with a redundant extension going back up.
    Come to think of it, a trap doesn't need a drain, a trap is designed to trap water. They might have said it needs to be provided with a cleanout, but ...... That whole rule seems rediculous. What are they thinking?


  11. #11
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    Default Re: TPR Valve Queastion

    Is that valve actually capable of cutting off flow of a TPR discharge? I'm not sure it is. I know it's wrong but the type of valve and its location doesnt look like it would block the discharge. I could be wrong.


  12. #12
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    Default Re: TPR Valve Queastion

    I don't think the manufacturer allows them to be trapped and the manufacturer specs should override the code.


  13. #13
    Cobra Cook's Avatar
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    Red face Re: TPR Valve Queastion

    The valve shown is only for draining from pop off?, looks like serves no other function, maybe they wanted to check the pop off for leaking, as the main line may go to where it could not be monitored. Other than that It does not affect or restrict the the pop off main line.


  14. #14
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    Default Re: TPR Valve Queastion

    Quote Originally Posted by Cobra Cook View Post
    The valve shown is only for draining from pop off?, looks like serves no other function, maybe they wanted to check the pop off for leaking, as the main line may go to where it could not be monitored. Other than that It does not affect or restrict the the pop off main line.
    Most people will agree that the discharge line should just go down, straight down if possible, as called for by the manufacturers. There is no need to route the pipe upwards, even in a basement. Put a pan under it if you like. The rule was written by a clueless bureaucrat and really should have been scrapped instead of amended. JMO.


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