I posed this question on another forum and just wanted to get more opinions. I will be running all new ABS for a new tub drain and vent and have been advised to essentially begin the transition from copper to ABS where the first 45* elbow is located by "sweating" it off and then using an ABS adapter.

The copper is near the end of it's life, which is why I would like to replace it as far back as possible. I was told that the only way to begin my ABS from the stack, which would enable me to replace the copper toilet drain would be to remove the wye in the stack and then run a ABS toilet drain.

Opinions please.

gromitiow

need to re-route the toilet drain from outside to inside running under the bath

gromitiow

need to re-route the toilet drain to travel under the bath then out of the wall to the outside down pipe,instead of it going strieght out the wall from the toilet.

doug238

the pipe layout is fine. who told you the 'life of the copper" is expired? is it leaking?

guga

Thanks for the response. No evidence of leaking. I think the toilet drain might be lead actually, but I'm not sure.
On the other forum it was suggested to me that the lifespan of copper is 50 years, which this is at least. I certainly will just tie into the copper with ABS if you suggest. Thanks

doug238

gently squeeze the copper with large channel-lock pliers at vertical points to test the strength of the pipe. it should not squeeze easily if at all. then check the horizontals. if it has weakened it will crush or give way easily. i have seen copper drains rot but mostly on the bottom and on a lavatory or sink drain that had much buildup.