The cast iron connection for my kitchen sink drain has become corroded and has no threeads as far as i can tell. It is in a slab, so I cannot replace it easily. What’s the best way to connect my sink drain?
Thanks, thanks and thanks again for your help.
Prescriptive codes don't address the connection at less common angles, so base the connection off more typical ones using bolts, structural screws, blocking, and steel tension ties.
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Replies
flexible rubber connectors....maybe
In my old place I've been "replacing" a lot of the old steel drain lines and ran into this situation.
I thought to just insert a PVC line into the available hole and a lot of sealant but then I got no strength. What I ended up doing was buying one of those flexible rubber pipe connectors with the stainless steel clamps at each end, big box stores. They're fairly stiff. I also made sure that I had the PVC and steel pipes touching, or nearly so...and use generous amounts of sealant before I tightened the beast down. I used this for a horizontal line so vertical ones should be less of a concern for you as you're not fighting gravity.
Other than that, hope I helped....Merry Christmas
ciao, t
Response
Thanks, "T".
So it sounds like you recommend I look for a reducing rubber connector...
Pipe Conecting
What you have is a pack and pour joint, thats lead around the top and there should be oakum below that, you have to take that out; make sure you put something in the pipe so nothing will fall down, start beating the lead toward the center, once you get it bent a little it should come out, under the lead is oakum, scrape that out of the pipe getting everything nice and clean, you then will be able to use a Fernco donut to adapt to pvc, I left you a site
http://www.fernco.com/plumbing/donuts-o-rings/donuts
Response 2
Wow. This is like Greek to me. Never heard of that, so I guess I better study up.Thanks!
Pretty much normal for any cast iron connection older than about 25 years. Plumbing used to be more of an art, back when you actually had to plumb (work with lead). Dig out the stub of the broken pipe and the lead and oakum (fibrous material under the lead) and replace with a rubber donut made for this purpose. Tap (ie, beat) the donut tightly into place.
Or you can try to replace the oakum and lead. It can be done with plastic pipes, but takes a buncha skill.
Lead Joint
If you decide to do your repair the way I suggested you have to buy that donut by what you are using; like 2in. pvc to 2in. cast iron hub, when you put it together make sure you do not have any sharp edges on the plastic and use a lube like dish detergent to make it easier to get together, luck.