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Which copper tubing

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rgar98
rgar98 Member Posts: 59
in Oil Heating
I'm replacing an indoor tank to oil burner line in Maryland. Is Type M tubing adequate?
Thanks.

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  • Intplm.
    Intplm. Member Posts: 1,973
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    Commonly used tubing is soft coiled 3/8 O.D. type -L- copper tubing. I've never used type -M- for an oil burner.
    Is it adequate? you ask? Probably, but why use type -M- ? Are you in abundance of -M- tubing and wanting to use it up?

    I have seen hard copper tubing used commercially to supply oil to burners. Soldered and fit as if it were water piping. Was surprised to find it installed for this use. Not my choice. Not the best workmanship.

  • Jellis
    Jellis Member Posts: 228
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    According to NFPA 31
    min .032 wall thickness copper tube or thicker may be used. which would mean type M is too thin.

    rgar98
  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
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    You can't use M. It's not going to flare properly, and you absolutely can't solder oil lines.
    And it needs to be done by code, for safety and liability. Specifically jacketed, and/or OSV, firomatics, etc.

    There was an error rendering this rich post.

  • rgar98
    rgar98 Member Posts: 59
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    @Intplm
    "Are you in abundance of -M- tubing and wanting to use it up?"

    How'd you know? I have a coil of 3/8" type M that I used to cool beer (at the initial stage of the brewing process).
    Does type L bend easily with those hand-held spring devices?

    Thanks.
    RG
  • rgar98
    rgar98 Member Posts: 59
    edited September 2020
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    @Jellis
    Thank you for the info. I appreciate it.
    RG

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