Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Mass Code Questions

DennisS Member Posts: 6
Just wanted to know if any of you guys in Mass would have the answer to these questions.

What is the smallest gas pipe that can be burried in the ground?

What is the smallest pipe diameter that can be concealed in or behined a wall?

I can't seem to find any of these answers in the Code book so I thought I would ask.



  • Brad White
    Brad White Member Posts: 2,398
    According to my copy of 248 CMR (dated 3/11/05)

    Mike, see 248 CMR 5.04 (Mass. modifications to NFPA-54) sub-paragraphs (1) and (2).

    Minimum underground line shall be not less than 3/4" and minimum concealed pipe shall be not less than 1/2".
    "If you do not know the answer, say, "I do not know the answer", and you will be correct!"

    -Ernie White, my Dad
This discussion has been closed.