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  1. #1
    Ted Menelly's Avatar
    Ted Menelly Guest

    Default can you do this???

    I have seen more water heaters than I care to imagine and I imagine I should have seen this before but I have not. Is it alright to do this??

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  2. #2
    Join Date
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    Default Re: can you do this???

    You "can" but you shouldn't.


  3. #3
    Ron Bibler's Avatar
    Ron Bibler Guest

    Default Re: can you do this???

    Everything be everything. like a box of chocolate just never known what you will get !!!

    Best

    Ron


  4. #4
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    Default Re: can you do this???

    No, the probe of the TPR must be in the top part of the tank.

    They make long ones but I don't think that long.

    Without that it will likely only open on pressure and not temp.


  5. #5
    Ted Menelly's Avatar
    Ted Menelly Guest

    Default Re: can you do this???

    Quote Originally Posted by Michael Larson View Post
    No, the probe of the TPR must be in the top part of the tank.

    They make long ones but I don't think that long.

    Without that it will likely only open on pressure and not temp.
    I was thinking that. It just kina thru me because I cannot remeber seeing one with that set up. I imagine the temp when things go bad cannot be more than a couple degrees off where it is sitting now. I wonder if it would really affect it.


  6. #6
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    Default Re: can you do this???

    Quote Originally Posted by Ted Menelly View Post
    I was thinking that. It just kina thru me because I cannot remeber seeing one with that set up. I imagine the temp when things go bad cannot be more than a couple degrees off where it is sitting now. I wonder if it would really affect it.
    The probe must be in the top 6 inches of the tank.

    Review this document.

    wattsPDF


  7. #7
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    Default Re: can you do this???

    Important Instructions: Relief Valves and Automatic Gas Shut-Off Devices
    Combination temperature and pressure relief valves with extension thermostats must be installed so that the temperature-sensing element is immersed in the water within the top 6" (152mm) of the water storage tank. They must be installed either in the hot outlet service line or directly in a tank tapping. Combination temperature and pressure relief valves that do not have extension elements must be mounted directly in a tank tapping located within the top 6" (152mm) of the water storage tank. Valves must be located so as to assure isolation from flue gas heat or other ambient conditions that are not indicative of stored water temperature.

    From the Watts sight.

    "Alternate" ONLY when the tappings are not provided:
    Use standard or extra length extension thermostat which permits the end of the thermostat to extend into the top 6" of the tank.




    Notice that is 6" maximum not minimum.

    Last edited by Jim Luttrall; 12-02-2008 at 06:05 PM. Reason: Larson already gave better information
    Jim Luttrall
    www.MrInspector.net
    Plano, Texas

  8. #8
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    Default Re: can you do this???

    Yes and no.

    Like the others have said, only if it is the long probe type and only if the long probe type allows for that height.

    Is suspect it does not.

    Watts makes T&P valves with 8" long extension probes, but that only allows for a 6" long nipple (give or take). Watts: 100XL | Temperature and Pressure Relief Valves | Water Safety & Flow Control That photo looks like it has a 6" nipple with a tee on it, making it probably 8" high, give or take.

    Maybe they make longer ones?

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  9. #9
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    Default Re: can you do this???

    Quote Originally Posted by Ted Menelly View Post
    I have seen more water heaters than I care to imagine and I imagine I should have seen this before but I have not. Is it alright to do this??
    Seems to me that there are a couple of things going on. First of all, the T/P valve should be in its own little fitting. All of the water heaters that I see today already have a T/P valve installed. I do see this type of installation on older water heaters. I usually recommend replacement because the water heater is likely past its useful life.

    Last edited by Gunnar Alquist; 12-02-2008 at 09:38 PM. Reason: unable to type and think at the same time.
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  10. #10
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    Default Re: can you do this???

    Looks like the relief line is too small too!


  11. #11
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    May 2008
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    Burleson, Texas
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    Default Re: can you do this???

    I like the rust coming out of that nipple.

    Dylan Whitehead

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