DIYbanter - View Single Post

wrote:

On 16 Dec 2003 10:12:03 -0800, (Lance
Uppercut) wrote:

Hi all.

In the attic of my new house I have two PVC sewer vent pipes that come
up from the floorboards. One of them is run completely through the
roof. The other terminates about two feet up from the floor into the
attic. Would it be feasible for me to put an elbow onto this pipe,
extend it over and join it with the pipe that goes through the roof.
I would like to avoid putting another hole in my roof for obvious
reasons. I'm not sure about the codes in my area, but I imagine that
this would not be a problem. I would appreciate opinions.

Thanks,

Scott

I'm a retired plumber. The answer is YES. Be sure that is a vent
though. I'd assume it would stink in your attic. But it could be an
air vent from a fan or dryer vent, or ?????

Be sure it is a sewer vent. If it is, use the SAME size pipe, and use
a slight upward pitch to the other stack. You dont need much pitch,
but you dont want it going downward.

I agree. That's how we did it in our house; to avoid multiple holes through the roof the vents from three places were joined together exactly as described.

But make sure it is a plumbing vent! Terry.