Seeking advice on installing a natural gas grill

Discussion in 'Plumbing Forum, Professional & DIY Advice, Tips & ' started by elamcup, Jul 31, 2005.

  1. elamcup

    elamcup New Member

    Messages:
    2
    Hey,
    Last year we had natural gas run to our home. The plumber used galvanized pipe from the meter with the 2 PSI regulator to the outside wall of the house. Inside he used ¾†CSST to a ball valve on 3/4†black iron pipe where there is a dirt trap pocket/drip leg. Next is the Maxitrol 325-5AL600 pressure regulator with an OPD, then ¾†black pipe to the manifold where ½†CSST goes to the boiler.
    I just bought a natural gas grill that I need to run a gas line to and I need some advice. We will add a few more gas appliances to the system in the future. I am going to use ¾†black iron pipe and run a main across the basement past the location where future taps will come off of it. The gas grill will be at the end of the main and it will be reduced to 1/2†pipe. I plan on using galvanized pipe for the brick wall penetration and a brass isolation valve outside at the grill. From there I plan on more galvanized pipe to the grill. Everything will be above ground.
    Here are my questions;
    1.I have read the galvanizing flakes off of the inside of the pipes when exposed to natural gas. Do I need to put a dirt trap pocket/drip leg in the line at the grill?
    2.I have read there is electrolysis between brass and galvanized pipe so the pipe will corrode away eventually. Is this true and if so how do I avoid it?
    3.Will I have electrolysis between black iron and galvanized pipe?
    4.I live in Baltimore County, Maryland. Can I use the black iron pipe outside and paint it to protect it?
    5. :confused: If I can use the black pipe outside should I still use a drip leg at the grill?
    Thanks for your help, Tom
  2. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,293
    Location:
    Cave Creek, Arizona
    Here are my questions;
    1.I have read the galvanizing flakes off of the inside of the pipes when exposed to natural gas. Do I need to put a dirt trap pocket/drip leg in the line at the grill?

    Most gas supplies these days do not have that reaction any longer.

    2.I have read there is electrolysis between brass and galvanized pipe so the pipe will corrode away eventually. Is this true and if so how do I avoid it?

    ELectrolysis is only a factor when there is there is a reragent, such as water, creating the current. It is not a factor with gas, and because of the positions of steel and brass on the nobility scale, it does not occur between them anyway.

    3.Will I have electrolysis between black iron and galvanized pipe?

    They are the same material, so even if gas caused electrolsis it would not occur.

    4.I live in Baltimore County, Maryland. Can I use the black iron pipe outside and paint it to protect it?

    Usually.

    5. :confused: If I can use the black pipe outside should I still use a drip leg at the grill?

    The drip leg is not a "galvanized pipe" requirement. It is also to contain moisture and "dirt" from the gas, so if you buiding department requires them you should install it.
    ]
  3. elamcup

    elamcup New Member

    Messages:
    2
    Thank you hj, Tom
Similar Threads: Seeking advice
Forum Title Date
Plumbing Forum, Professional & DIY Advice, Tips & seeking kitchen faucet advice: are "pulldowns" OK? Sunday at 12:14 AM
Plumbing Forum, Professional & DIY Advice, Tips & Seeking advice on water heater hoses Apr 20, 2014
Plumbing Forum, Professional & DIY Advice, Tips & Seeking advice - Attempt replacement of hose bibb leads to a corroded pipe Apr 22, 2012
Plumbing Forum, Professional & DIY Advice, Tips & Seeking advice on connecting utility sink pump Dec 27, 2011
Plumbing Forum, Professional & DIY Advice, Tips & Seeking help to reduce noise from shower drain Apr 20, 2008

Share This Page