Not sure which route to go for gas line??

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by Gnfanatic, Oct 28, 2012.

  1. Gnfanatic

    Gnfanatic New Member

    Messages:
    43
    Location:
    New Jersey
    Hey guys, hope all is well :) I am converting my 12x10 breezeway into a kitchen. the breezeway is on a slab which is right next to the house foundation/basement. I need to run a gas line to the other side of the breezeway for the gas stove. What would be the best route?? Cutting into the slab and running a plastic gas pipe OR running black pipe through the attic , down the wall?? The attic is completely exposed (no sheetrock or insulation currently). I need to cut into the slab for the sink drain anyways but not sure what to do with the gas.

    I appreciate your help!
    Ralph
  2. MACPLUMB 777

    MACPLUMB 777 TROJAN WORLDWIDE SALES RP

    Messages:
    679
    Location:
    Houston, Texas, United States
    Take gas pipe overhead,
    never ! Ever ! Under concrete
  3. Gnfanatic

    Gnfanatic New Member

    Messages:
    43
    Location:
    New Jersey
    That is what i thought. Obv a few 90 degree and 45 degree bends is going to effect pressure. will 3/4 in line be fine for a 4 burner stove??

    thanks!
  4. Gary Swart

    Gary Swart In the Trades

    Messages:
    7,332
    Location:
    Yakima WA
    May I assume you are pulling permits for this addition? Does your state, county, and/or state allow you to do gas work? Many places are very touchy about these things. If you do your own work without a permit, you could very well have a problem with your insurance. The advice given is correct, but you could be headed for problems.
  5. Gnfanatic

    Gnfanatic New Member

    Messages:
    43
    Location:
    New Jersey
    Hey Gary, yes i am. I am doing the rough work and will have the plumber connect it to the main line and pressure test it. thanks :)
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,503
    Location:
    Cave Creek, Arizona
    The city is allowing you to build a room "addition" to the house on a concrete slab that does not have a foundation and footing, which few carport slabs have? I would never let the customer install a gas line because when I test it, it might have to take it apart to repair leaking joints. There are ways to run a gas line under concrete, but they are very specific and expensive, so they are usually only used for natural gas to an island cooktop.
  7. bluebinky

    bluebinky Member

    Messages:
    388
    Location:
    Santa Clara, CA
    You will have to recalculate the sizing all the way back to the meter. 3/4", or even 1/2", may be enough, or you may have to replace some or all of the existing pipes to make it right. Can't say without a diagram of what you have. There is a simple procedure spelled out in the code book for figuring this out.

    Also, I would leave the combination of plastic+gas to the pros -- including not some handyman at $8/hour.

    Assuming you are allowed to, I wouldn't even think about touching any gas piping until after reading, understanding, and then re-reading the code plumbing code. After that, be sure to pull permits and have your work inspected...

    All that said, gas piping isn't that hard for a skilled DIYer (after a lot of learning up-front).
  8. Gnfanatic

    Gnfanatic New Member

    Messages:
    43
    Location:
    New Jersey
    thanks guys. HJ, this is a 6 inch slab. many houses are built on a slab and of course it has a footing.
  9. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,503
    Location:
    Cave Creek, Arizona
    Here, the majority of houses are "built on a slab", but most carport slabs do NOT have foundations, other than "pads" for the support columns.
  10. Terry

    Terry Administrator Staff Member

    Messages:
    14,903
    Location:
    Bothell, Washington
    A foundation goes below the frost line. I would guess that New Jersey has a more stringent code for foundations because of the colder weather.
  11. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    hj's comments, which mirror my experience....admittely not east coast/cold weather experience.....is that patios, breeseways, etc are not built on the same 'quality' of slab structure as the house itself. I guess you have...or will....verify all this.
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