After using a clean-out to access a clog with a snake, the fitting cracked when I went to replace the cap. Went to my local neighborhood hardware store (the folks there are usually pretty knowledgeable) to get supplies to replace the clean-out. I cut the line (2" id ABS) above and below the existing clean-out; I then attached the new clean-out to a length of new pipe, and attached a coupling to the upper end of the new length. My intention was to attach the new clean-out directly to the existing pipe coming up from the concrete floor, and cut the existing line to fit the top of the new fitting. When I placed the fitting on the lower existing pipe, the metal elbow (in the concrete floor) gave way and broke! When I finally stopped kicking the wall in frustration over having to rent a jack-hammer and replace the in-floor line, I started wondering if I could just run the drain line through the ceiling, across the basement, and tie it into the drain line from my bathroom sinks. Is this something feasible, provided I have the right amount of slope? Both drain systems are currently vented; would this necessitate any more venting?

Hi Tom

What fixture/appliance drains into the broken drain line? Without that information I can't really answer you here. Let me know and I can be more specific in my answer, OK?

Now, in terms of connecting into the other drain line, if it is 2" you may be OK here, but if it 1.5" it probably isn't feasible.

Also, if you think about it, you still are going to have to fix the broken drain line going into the floor... can't just leave it broken like it is as sewer gasses can escape and if there is a sewer drain blockage in the future it can/will probably back up and out the broken pipe, so you really do need to deal with that. Since you have to deal with it, AND the sink drain plumbing is probably just as old as the rest of the plumbing in the house I'm thinkin' you may just be best to make the one repair here and not open up Padora's box... maybe?

Glad to discuss

Mark