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Thread: Putting a T connection at the natural gas line

  1. #1
    DIY Junior Member bis's Avatar
    Join Date
    May 2010

    Default Putting a T connection at the natural gas line

    I have natural gas pool heater connection at the inlet close to gas meter.It is in T shape.
    At the T,One connection to house supply and the other to pool heater.
    City inspection guy failed inspection saying install full size T at house side of gas meter line.I am sure natural gas is supplied at some pressure wether you put T connection at the source or take one side T off and put T connection on pipe entering the house should't make any difference.You could easily slide that T joint to source inlet and you have the same situation what we started with.This is the law of mass transfer.Total gas comming into residence
    =Gas supply to pool heater+gas supply to house.
    How can it reduce the gas supply to house completely when pool heater is operating?
    I am sure pressure can't drop to nill on house side of pipe.
    Can you please Give me some input to this problem.Will it really reduce gas supply to house?
    Last edited by bis; 05-10-2010 at 11:07 AM. Reason: additional info

  2. #2
    Nuclear Engineer nukeman's Avatar
    Join Date
    Nov 2009


    Can you add a pciture? I am not sure if I understand the situation.

  3. #3
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    Hard to tell without seeing what you have. What are the BTU requirements of stuff on each branch? And, what size pipe and T is it? What size pipes feed each side? The pressure will only be constant when no flow. The regulator will try to keep the pressure up, but it also depends a lot on the length of the pipe, it's diameter, how many turns it takes, and the BTU (flow) requirements. If there are reductions anywhere, it can mess up the flow.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4
    Moderator & Master Plumber hj's Avatar
    Join Date
    Aug 2004
    Cave Creek, Arizona


    Have absolutely no idea what you are talking about. We would have to see where AND how that tee was installed. Gas behaves slightly differently than water, but the codes equate the two. What WILL work and what is REQUIRED, are not always the same. Show us a picture of what your connection looks like.


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