Nat Gas Safety Shut Off??

Discussion in 'Plumbing Code Questions' started by Murphy625, Sep 26, 2013.

  1. Murphy625

    Murphy625 Member

    Messages:
    155
    Location:
    Michigan
    Hi all,

    I have a question about the valves used on residential natural gas lines. It would seem that every residential home I have ever been in has these little red-handled gas valves in front of every appliance connection point.
    They look like this:
    http://www.pexuniverse.com/store/category/gas-ball-valves

    Is there any problem with just using a normal every day brass ball valve like one of these:
    http://www.pexuniverse.com/store/category/sweat-ball-valves-c-x-c

    The ball valves say 600 WOG (water oil gas) on one side and "1/2 PSI" on the other. (I'm not familiar with the 1/2 PSI designation)

    Must I use the little valves with the red handles or can I just use a regular full port ball valve?
  2. Murphy625

    Murphy625 Member

    Messages:
    155
    Location:
    Michigan
    Well that's not a very specific answer.. I was hoping for something a bit more definitive. (prepare for attitude :confused:) Its natural gas, it kills people, it blows homes up... the 600 WOG valve is either the right one or it isn't.
  3. Murphy625

    Murphy625 Member

    Messages:
    155
    Location:
    Michigan
    Huh?
    Where did DonL post go??
  4. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,517
    Location:
    Houston, TX
    Maybe someone can give you you a better answer.

    Gas is nothing to play with.

    Why not just use the proper gas valve ?

    I guess I do not get it.

    Are you wanting to use the valve on a Main gas line or a appliance ?


    Don't blow yourself up.
    Last edited: Sep 26, 2013
  5. Murphy625

    Murphy625 Member

    Messages:
    155
    Location:
    Michigan
    I do not like having to purchase things when I already have suitable items available. Since I have a dozen or so brass 600 WOG brass ball valves, I don't see a reason to go buy another valve.. I've used them on 5 PSI lines that I plumbed to a large industrial oven.. I know they'll work.. the question is, is it up to code..

    I already have a 1 inch full port brass ball valve on the main line to isolate the section I am working on. My question is in regard to a safety shut off valve at the new power-vented water heater.

    I am 99% sure it would pass any inspection but I just want clarification to be sure.. I see no engineering reason why it wouldn't be appropriate but that 1% is where code does not always jive with logic.

    Anyone??
  6. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,517
    Location:
    Houston, TX
    You should look in your appliance manual, It will most likely tell the proper shutoff to use.

    If it states something like;

    1/2 psi for indoor appliance connections per ANSI Z21.15 and CSA 9.1, 5 psi for indoor shutoff per CGA 91-002 and ASME B16.44 .

    Then it will need to be rated as per them standards.

    If you use the wrong valve, then it will be the inspectors call on whether to pass it or not.


    Good Luck.
  7. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    27,267
    Location:
    Cave Creek, Arizona
    The "wog" stamping means for liquid gas. A natural gas valve should have an AGA certification, although ball valves are often used.
  8. Murphy625

    Murphy625 Member

    Messages:
    155
    Location:
    Michigan
    So will the ball valve pass code?
  9. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,517
    Location:
    Houston, TX

    That is a answer that your local inspector needs to answer. Or it will just be a guess.

    Depends if you buy lunch.

    I will repeat;

    "If you use the wrong valve, then it will be the inspectors call on whether to pass it or not."

    Is that to hard to understand ? If I am wrong please correct me.

    What is Murphy's Law ? They are both ball valves with different ratings.

    Just do it because you know that you want to, Just to save a few bucks. And it will work.

    Sometimes a shutoff is not required, If the appliance has a way to shut gas off without removing a cover.

    Checking YOUR local code will give you a clue. I know I can not. lol

    Murphy's Law has always worked against me.


    Good Luck.
    Last edited: Sep 30, 2013
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