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Old 12-30-2007, 06:42 PM   #1
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Copper pipe type for residential water distribution


Hey there-

In addition to redoing all of my black iron gas lines (see other post), I'm also redoing all of the water distribution piping in my house (here in Oak Park, IL). The local BORG sells types K, L and M. From my reading I understand that type K has the greatest wall thickness and is typically used for burial applications, L is somewhat smaller and M is the smallest.

Is the type that is allowed for a given home dictated by the uniform plumbing code (or one of the others) or by the local code authority?

Thanks,
Jimmy

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Old 12-30-2007, 06:55 PM   #2
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Copper pipe type for residential water distribution


You're right. K is for underground supply service, and L is the next thickest wall copper pipe (used in commercial and residential), and M is OK for residential interior supply pipes. Contact your local Building Inspection Department for confirmation of what you're allowed to use where in your jurisdiction.
No matter what the pipe wall thickness (K, L or M), all of the fittings all have the same ID to fit any type of the same size pipe exterior dimensions...1/2", 3/4", etc.
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Old 12-30-2007, 07:16 PM   #3
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Copper pipe type for residential water distribution


section 604.2 type L

exception type M may be used for piping above ground in or on a building. and in ground outside the building

from the 2006UPC


yes you can

Last edited by ranman469; 12-30-2007 at 07:19 PM.
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Old 12-30-2007, 08:08 PM   #4
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Copper pipe type for residential water distribution


Check with your local building department. Here M is only allowed for use in closed systems (mainly heat), everything else above ground must be L.
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Old 12-30-2007, 08:46 PM   #5
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Copper pipe type for residential water distribution


You could use pex.
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Old 12-31-2007, 07:15 AM   #6
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Copper pipe type for residential water distribution


What's a BORG?
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Old 12-31-2007, 07:53 AM   #7
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Copper pipe type for residential water distribution


Quote:
Originally Posted by jpplumber View Post
What's a BORG?
Big Orange Retail Giant. They come to town and assimilate all the small mom and pop hardware stores, a la Star Trek. Also note the similarity between the term "Big Box" and the shape/size of the Borg warship!
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Old 12-31-2007, 08:39 AM   #8
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Copper pipe type for residential water distribution


Use type "L" and you'll be fine.

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