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View Full Version : 2" drain lines and 1/2" supply lines in a 2x4 wall



aroccos
09-24-2006, 08:32 PM
I am having trouble squeezing everything in!!
I ran the drain lines horizontally and now I am
running the supply lines. There is enough room
if the supply lines are allowed to touch the drain lines.
Is this ok? The supply lines would be right up against
the drywall (behind the cabinets so I am not worried
about someone nailing through them.
Alexis

Verdeboy
09-24-2006, 10:47 PM
If the supply lines are right up against the drywall, the condensation on them will eventually rot out the drywall.

Can you post a photo?

hj
09-25-2006, 06:02 AM
There is no condensation inside the walls because there is no mumidity there.

aroccos
09-25-2006, 09:50 AM
What if I wrap the supply lines with 1/8" foam/foil insulation?
Will it pass inspection?
Alexis

Verdeboy
09-25-2006, 10:20 AM
There is no condensation inside the walls because there is no mumidity there.

I don't think I've ever seen copper pipes that were actually brushing up against the wall, which is my concern. Even if no humidity, it seems a bit odd and might result in noisy pipes.

I don't know what the codes are. I'm sure others on this forum might know.

OldPete
09-25-2006, 10:26 AM
There is no condensation inside the walls because there is no mumidity there.


I was under the impression that if the temperature inside the wall cavity and the temperature of the water inside the pipes is greatly different (which happens often) then you can get condensation on the pipe.

I might have missed something.

jadnashua
09-25-2006, 01:05 PM
There is normally very little air movement within a wall, especially if it is built properly. Without air movement, there is a finite amount of moisture. It normally isn't a problem. Now, an open pipe in the basement ceiling, open to the air can drip a bunch.