how do I purge gas line? I installed new gas range.

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by Handyman Miguel, Sep 12, 2006.

  1. Handyman Miguel

    Handyman Miguel Junior Member

    Messages:
    2
    Since the old range was electric, there was no gas line. I "T"d into the 1" supply line w/3/4". Ran 15' of blk pipe to where the stove is. I've got everything hooked up and ready to go, but now I've got to purge the line. I've got H2o heater, the stove, the furnace, and the dryer on this line. I know the next step...er...I think the next step is to purge the line but with all these appliances that are hooked up, HOW DO I DO IT?
  2. Cass

    Cass Plumber

    Messages:
    5,980
    Location:
    Ohio
    Did you do this work in your house or another?
  3. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,230
    Location:
    Cave Creek, Arizona
    gas line

    If you knew how to do the gas line correctly, you should know the answer to your question. One way is to turn on the stove while holding a match to the burner so the gas lights when it arrives.
  4. Mikey

    Mikey Aspiring Old Fart, EE, computer & networking geek

    Messages:
    2,713
    Location:
    Central Florida
    Now let's hear the other way...
  5. Verdeboy

    Verdeboy In the Trades

    Messages:
    2,051
    Mikey, he could turn on the stove and not light a match!

    In all seriousness, though, nature is always striving for equilibrium. So, the second you open the gas valve, the gas will pour through the gas lines in the stove to try to equalize the pressure. If you have pilots, the air will purge itself in a few seconds and you will begin to smell raw gas. You should then light the pilots. If you have the old style stove that has no pilots, you will purge the gas from each burner separately when you turn the burner on and light it. If you have the newer stove with electric spark, you just have to hold the knob in the "light" position until the air is purged and the spark ignites the gas.
    Last edited: Sep 12, 2006
  6. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,296
    Location:
    Yakima WA
    Miguel, the air in the new line will be expelled when you turn on the new appliance. Since gas is colorless, to tell when the gas has reached the appliance, you should open the burner and continue to attempt to ignite it. If you have a built-in ignitor, just keep trying it until it lights. If doesn't have an ignitor, then open the burner and hold a flame near the jet. I'd use my propane torch, but several matches will do. Gas is not under really high pressure, so it will take longer than if it was a water line. I would suggest you test your connections with liquid dishwashing soap to make certain your joints are all gas tight. Don't use flame to do this!
  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,230
    Location:
    Cave Creek, Arizona
    purge

    The other way is to disconnect the connector from the range and open the valve. Then listen for the sound of the escaping air to change pitch when the gas arrives, (you will also smell the gas). But this is for big gas lines by a professional.
Similar Threads: purge line
Forum Title Date
Plumbing Forum, Professional & DIY Advice, Tips & Winterizing Domestic Plumbing/Purge Baseboard Loop Oct 11, 2010
Plumbing Forum, Professional & DIY Advice, Tips & Water Softener Drain Line Question Jul 11, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Would old supply line cause low pressure? Jul 2, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Next steps before replacing hot supply line Jul 1, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Gas line for dryer Jun 30, 2014

Share This Page