Copper DWV pipe

SG · Mar 30, 2008

I have a 3" copper toilet Wast pipe that I need to move slightly during a bathroom remodel. Several questions, can you connect PVC to copper with no hub band connectors and is it code? Second, I assume there is really no difference in sweating 3" copper as opposed to smaller copper water pipe?

hj · Mar 30, 2008

transition

NOT a No-Hub coupling but a transition coupling designed for the two different materials. Bigger copper = more heat.

Sponsor · 2022-01-29T12:20:58-0800

Redwood · Mar 30, 2008

Well sweating copper that size really is no different than sweating smaller stuff just the size... And that would include the size of the flame required. I doubt that your propane torch (just a guess) would be up to the task.

There are banded couplings such as the Fernco Proflex, and Mission Coupling lines that adapt Copper to PVC or, ABS this is what I would use. The copper has the same I.D. as the plastic but the was thickness is much thinner so the O.D. is much smaller. These couplings I mentioned have thicker rubber on the copper side to make up for this difference.http://www.fernco.com/proflex.asp

SG · Mar 30, 2008

Copper 3" DWV

Thanks for the great info. I assume these fittings would meet most code requirements?

Redwood · Mar 30, 2008

Yes they do.

Winslow · Mar 30, 2008

Dwv copper is very thin, it won't take as much heat as one would think

SG · Mar 30, 2008

Copper DWV

Thanks very much for the great information.

rudytheplbr · Mar 30, 2008

Copper DWV

SG said:
Thanks very much for the great information.

I started my plumbing apprenticeship (lo many yars ago) when we were still using cast iron and copper DWV, and I stil think its the best for Waste systems installation. Also, I am considered a copper DWV mechanic.

hj · Mar 31, 2008

?

Also, I am considered a copper DWV mechanic.

What does that mean? I can see being a DWV mechanic which would mean you know how to create a proper DWV system, but I would prefer to be a "cast iron, copper, ABS, and PVC" mechanic if I were to be considered a "real" plumber.

Redwood · Mar 31, 2008

About the only thing I don't want to be known as is a "Lead Bend Mechanic."

Herk · Apr 3, 2008

Redwood said:
About the only thing I don't want to be known as is a "Lead Bend Mechanic."

Around here, I've seen a few "Radiator Hose Drain" mechanics . . .

Lakee911 · Apr 4, 2008

When I tackled my bathroom remodel, I noticed that I had galvy vents and copper drains, and a cast stack, clay main drain to sewer and a lead closet bend for the toilet. I could see where someone added some PVC later, and so did I, but is all this different material common in the 1920's?

Thx
Jason

Redwood · Apr 5, 2008

The copper probably came later than the other stuff,

Copper DWV pipe

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