Natural Gas pipe connection question.

Discussion in 'The Bench' started by eagleguy, Jul 24, 2021.

  1. eagleguy

    eagleguy 1971 Skylark Custom

    Had my home plumbed to include a natural gas line for my new BBQ. I need to add a double end male 3/8 threaded fitting to mate with my Weber Gas Grill quick connect. What kind of thread sealant should I use? Seems all the current fittings used some sort of liquid or paste sealant but my local ACE store said the RED Teflon tape would work fine as its for gas fittings. True?
     
  2. TrunkMonkey

    TrunkMonkey Well-Known Member

    PTFE paste. (I use Oatey white)

    I prefer the paste to tape. Yeah, it is about as messy as anti-seize and one drop will cover the earth better than Sherman Williams, but it is great stuff.

    (Cleans up with isopropyl alcohol fine)
     
  3. gstewart

    gstewart Well-Known Member

    I believe the yellow tape is also for natural gas..
     
    69 GS 400 likes this.
  4. Matt Knutson

    Matt Knutson Well-Known Member

    Either should work fine. Check with a little soapy water if in doubt of a good seal.
     
    Max Damage likes this.
  5. eagleguy

    eagleguy 1971 Skylark Custom

    The PTFE tape I was sold is the Red on which I believe is incorrect. As far as checking for leaks I would have to cap the pipe first as Weber provides a quick connect like that on an air hose for the supplied line on their grill.
     
  6. Cutlass

    Cutlass Platinum Level Contributor

    +1 great stuff
     
    TrunkMonkey likes this.
  7. Dano

    Dano Platinum Level Contributor

    Typically, teflon tape is a no-go on gas lines. Too easy for a piece to get caught in a gas valve.
     
  8. 69 GS 400

    69 GS 400 Well-Known Member

    Max of 2 wraps with the yellow gas tape. Always check with soapy water but make sure there is enough soap to make it bubble. Worked on a hirise and the guy spent a week looking for a leak on a 50 psi test . I asked to see his spray bottle. Not enough soap . Added more and he found the leak in 10 minutes. Lol
     
  9. TrunkMonkey

    TrunkMonkey Well-Known Member

    We used "Leak Tec" on aircraft pneumatic systems and a good substitute is 1 part glycerin, 2 parts dish soap (Dawn), 7 parts water and you will have lots of bubbles.
     
    Max Damage likes this.
  10. riv2x4

    riv2x4 Well-Known Member

    Interesting enough, I just bought a natural gas grill and the instructions for the quick connect to the gas pipe stated no tape or pipe dope. Installed and used the soapy water to test for leaks and it was good.
     
  11. eagleguy

    eagleguy 1971 Skylark Custom

    well yellow tape seal worked fine. do you guys leave the main gas valve that the bbq is connected to on or off when not cooking?
     
  12. riv2x4

    riv2x4 Well-Known Member

    I keep it off when not in use. Also have a shutoff in the house.
     
  13. nekkidhillbilly

    nekkidhillbilly jeffreyrigged youtube channel owner

    i use the yellow tape from lowes too. i would leave it off when not using just a added measure.
     
  14. Brandon Cocola

    Brandon Cocola Well-Known Member

    Is it a tapered seat or pipe thread? I didn't think you used sealant in thoes applications.
     
  15. 69 GS 400

    69 GS 400 Well-Known Member

    Flare no. Pipe thread yes.
     
    1973gs likes this.
  16. eagleguy

    eagleguy 1971 Skylark Custom

    All is good. Had the first BBQ, nothing bad happened and food came out perfect!
     
    Cutlass and 69 GS 400 like this.
  17. HotRodRivi

    HotRodRivi Tomahawks sighted overseas

    Its always easy and quick to check for leaks with a lighter. I would not do that to an obvious leak though. Need to use common sense with that one. Butt that is safer than checking for a high pressure steam leak with your hand.
     
    Max Damage likes this.
  18. Matt Knutson

    Matt Knutson Well-Known Member

    Sounds safe. What could go wrong? Hope you are kidding.
     
  19. gstewart

    gstewart Well-Known Member

    A plumber friend of mine also used the lighted match to check for leaks even when he hooked up a gas line for my gas stove, many years ago.
     
  20. BillA

    BillA Well-Known Member

    They are referring to the flared connections not pipe thread connections.
     

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