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Thread: TPR Valve Queastion
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11-16-2009, 02:30 PM #1
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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11-16-2009, 02:34 PM #2
Re: TPR Valve Queastion
No way. No how. Plus, the drain pipe isn't allowed to go up, which it seems to be doing.
"There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
www.ArnoldHomeInspections.com
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11-16-2009, 03:13 PM #3
Re: TPR Valve Queastion
John
Don't be so sure, Georgia has some amendments that address this.
SECTION 504*Revise Section 504.6.1 ‘Discharge’ of the Georgia Amendments revised January 1, 2002 and rename ‘Relief discharge.’
SAFETY DEVICES
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.
' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.
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11-16-2009, 05:35 PM #4
Re: TPR Valve Queastion
At least its not a deadly as this home made IED !!!
Jerry McCarthy
Building Code/ Construction Consultant
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11-16-2009, 07:46 PM #5
Re: TPR Valve Queastion
"There is no exception to the rule that every rule has an exception." -James Thurber, writer and cartoonist (1894-1961)
www.ArnoldHomeInspections.com
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11-17-2009, 05:14 AM #6
Re: TPR Valve Queastion
' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.
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11-17-2009, 05:42 AM #7
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?
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11-17-2009, 06:48 AM #8
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)
' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.
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11-17-2009, 05:54 PM #9
Re: TPR Valve Question
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11-17-2009, 06:27 PM #10
Re: TPR Valve Question
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?
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11-17-2009, 06:39 PM #11
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.
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11-17-2009, 07:33 PM #12
Re: TPR Valve Queastion
I don't think the manufacturer allows them to be trapped and the manufacturer specs should override the code.
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11-18-2009, 09:18 AM #13
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.
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11-18-2009, 06:43 PM #14
Re: TPR Valve Queastion
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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