Rerouting vent, changing pipe type

Lockeset

Hey guys, I would like to reroute the vent pipe as it runs horizontally thru my attic. It is copper and the outside measures about 2 1/16" or 2 1/8". I just want to reroute it over to the side so that it doesn't run right across the open area where I'd like to put flooring down.

My plan was to cut the copper pipe, take it to the scrap yard, and replace it with PVC pipe (and pocket the rest of the scrap money)

What PVC pipe should I use for this? If I use 2", then the outside diameter of the PVC would be bigger than the OD of the copper. I was planning on using a Fernco/NoHub to connect the copper to PVC on each side.

Ideas?

Thanks!

the_man

easily done, there is a nohub made specifically for this. you can also use a 2x1.5 fernco. its a little tougher to get on, but it'll go. the nohub you should be able to get at any plumbing supply (HD probably won't have this)

Lockeset

Ok, great, so if I go to a plumbing supply house they will know exactly what I mean?

I kinda figured that I wasn't the first person to try and do this so there had to be an easy way out.

the_man

you'll ask for a 2" plastic by 2" copper nohub coupling. I've seen one parts house that didn't know what a nohub was, when I called it a shielded coupling he jumped right up and ran to get it

the_man

you're not the first, but what you're gonna have to do is cut that copper out, put it in a large box, then mail it to me

Lockeset

There is a good 20 feet of it so it's too heavy to ship

Thanks for the info!

the_man

nothing is too heavy to ship, it'll just be expensive but my houry labor is $95 per. you'd probably get off cheaper than if i sent you a bill

Lockeset

I asked for just that. He gave me a pair of Mission CK22's.

I looked them up and they are listed for copper to cast. Will this work for copper to PVC? I assume the outside diameter of cast is about the same as PVC?

secutanudu

You might want to check local code for the vent pipe size. In my town, they want 3" protruding up from the roof.

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Andrew

TheEplumber

Cast and PVC are only slightly different OD. It's fine for what your doing.

the_man

the difference in size on a 2" pipe is really small, it'll work just fine. it only really matters for 3" and above

Lockeset

Thanks guys!