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    Alpac's Avatar
    Alpac Posts: 17, Reputation: 1
    New Member
    		  
    #1

    Apr 5, 2008, 04:20 PM
    Solder fittings to Type M copper
    What challenges do I face if my existing plumbing is Type M? Existing copper is 35+ years old.

    I purchased Type L copper lines. I don't think my fittings were typed.
    massplumber2008's Avatar
    massplumber2008 Posts: 12,832, Reputation: 1212
    Senior Plumbing Expert
    		  
    #2

    Apr 5, 2008, 04:34 PM
    Hey Alpac:

    No problem on fittings. They are universal fit/type.

    Pipes are different thickness...

    TYPE M... Heat
    TYPE L... Water
    TYPE K... underground water.

    You have type M in your home for water... a lot of homes built in the 70s have type M for water... not a really bad thing... just thinner, may break down sooner then the type L.. but all in all... I see it quite a bit!

    So, anyway, fit up pipe/fittings as usual... just be careful not to overheat the type M... and solder as usual for type L pipe.

    Good luck... Mark
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