Telltale Tee

Discussion in 'HVAC Heating & Cooling' started by Tuttles Revenge, Oct 15, 2014.

  1. Tuttles Revenge

    Tuttles Revenge In the Trades

    Joined:
    Oct 15, 2014
    I recently failed a gas piping inspection in Seattle. I had moved a branch on an existing system and had installed a ball valve in order to isolate the extension and test only that portion. I and everyone I know has done this a million times. The inspection report said to install a Telltale tee which I, nor anyone I know and talked to, knew what that was. My best guess was to install a tee after the valve with a valve on each port of the tee. I left the supply side and the new install valves off to control the gas and the test while leaving the third valve open.. I guess this is intended to keep a failed valve used in a test from adding outside air into a gas system. I had the system inspected again, but this time I was there and of course I get a different inspector who I know and he doesn't even glance at it and we ended up talking about something else and forgot to ask about the Telltale.

    Anyone ever heard of this? Is this common in other jurisdictions?
     
  2. Tuttles Revenge

    Tuttles Revenge In the Trades

    Joined:
    Oct 15, 2014
    OH Wow.. coming on my 6th yr anniversary joining and asking this question.

    The Tale of the Telltale Tee. A work in one part and several fittings. Telltale Tee.png
     
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  4. Terry

    Terry Administrator Staff Member

    Joined:
    Aug 17, 2004
    Occupation:
    Plumber
    Location:
    Bothell, Washington
    Wow! I would not have thought of that. Thanks for the update and picture.
     
  5. fitter30

    fitter30 Active Member

    Joined:
    Feb 2, 2020
    Occupation:
    Retired service tech
    Location:
    Peace valley missouri
    If you had a valve at existing equipment and new don't understand why it failed. In st. Louis they checked beyond the shut off valve on a piece of equipment.
     
  6. Tuttles Revenge

    Tuttles Revenge In the Trades

    Joined:
    Oct 15, 2014
    I wasn't testing the existing piping. I only tested what I installed new.

    So say you're retrofitting in a condo.. access becomes problematic at best.. like the time I blew the diaphragm of a 3" gas meter and the utility wanted to inspect every inch of the system before agreeing to turn the meter back on.. without notice 72hrs in advance that isn't happening.
     

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