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Thread: Extending a Natural Gas Line to Grill

  1. #1

    Default Extending a Natural Gas Line to Grill

    I bought a NG grill for the deck. Have natural gas service in the house. I'd like to place the grill on the deck in a spot that's only about 10 feet away from the range in my kitchen. So basically what's involved is inserting a T fitting into the gas line in the basement,running a line out to the deck and installing a fitting at the end. If this were a water line, I would do it myself, but I don't want to mess with gas.

    I had a plumber come by for an estimate (this work seems to get done by plumbers) -- and he came back with $750! Seems ridiculous. I'm getting other estimates, but my question is, is $750 to extend a gas line a few feet either a mistake or a rip off? Does it sound about right? If that's the going rate, so be it, but something smells fishy.

  2. #2
    I&C Engineer (mostly WWTP) Lakee911's Avatar
    Join Date
    Aug 2005
    Columbus, OH


    Probably some nuissence fee in there for the small job. Is he also pulling a permit?

    I'm assuming you're using black iron pipe. If you have no unions, he will have to move the stove to undo the flex line from the stove, which then typically requires replacement per mfg instructions. He'll then have to undo each one of the connections back to the place where he wants to insert the tee. Then put those pieces back. He'll have to build the pipe from the tee to the outside, drill holes, maybe crawl under the deck? Add a valve and more flex line to the grill. The gas will need to be shut off and leak tested and inspected and then all pilots relit.

    I can see it being a few hours at least.

    Is a drip leg required for the grill?


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


    My neighbor did this and it cost her $1k.

    Take careful note of the national fire codes...there are some fairly new and quite restrictive code requirements for both propane fired and natural gas applicances (grills) when used on decks. It gets much tougher on a multi-family dwelling, too. They make it very difficult to meet the requirements when using propane, and still tough with NG to meet the spacing and clearance requirements.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

  4. #4
    Plumber jimbo's Avatar
    Join Date
    Aug 2004
    San Diego


    You will see that tee-ing into an existing line is not so simple. You either have to take a lot of pipe apart, then reassemble, or cut into the line and rethread the ends in place.....not fun. You will want an additional shut off valve. Naturally, a permit is required and the lines must be tested.

    What does your local code require for pipe outside? Black, painted? Galvanized? Epoxy?


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