Hi everyone,
Quick question. I am renovating a house and I have just cut out all the old cast iron drain and vent pipe back to the main drain line that leads out of the house and to the city sewer. I'm going to be connecting PVC drain pipe to the remaining cast iron with banded no hub coupling, but behind where I will be connecting to the cast iron is a branch drain line .that used to lead to the kitchen sink. Can I cap this off without creating any drainage problems and if so, how would you recommend doing it? As you can see in the close up photo, there are a number of joints on this little piece of pipe, and the last joint, closest to th ground, is broke(pipe can wiggle back and forth). Any suggestions.


Thanks a million and happy new year!

Jeff

The broken pipe is that the one going into the bell that's in the ground? If so is that a lead joint or mortared in? You can dig out around it and cut it with a sawzall and do no hub cloupling there or if you can clean the bell out enough there's a rubber insert that goes inside the bell and the PVC goes in that.
Now where is the vent for the main line you are replacing. The kitchen tied in you cut out is gone for good. Yes cap the old kitchen sink stubb providing it wasn't used as a WET VENT for that section of sewer line and that's now back to do you have a vent on the new main and if so you should be OK. It was a hair difficult for me to get the situation but if it meets mine thoughts here your fine .While you are add it think about a Y for a future clean out on that line as you re pipe

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Cut Cast Iron between hubs. Install Jim Cap (rubber cap with s.s. band / Home Depot / about $2.00 ) to seal off the pipe.

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Originally Posted by Milo Dolezal

Cut Cast Iron between hubs. Install Jim Cap (rubber cap with s.s. band / Home Depot / about $2.00 ) to seal off the pipe.

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Thanks for the quick responses guys. Here's my problem. The last hub you can see closest to the ground is part of a y-fitting in the 4 inch horizontal cast iron pipe that reduces to 2 inch for this branch. The pipe that goes into this fitting is loose(joint is broken at the hub.) Can I remove pipe at last hub, then heat up the joint and clean out the joint and then use a rubber coupling that would fit over the hub on one side and reduce to take 2 inch pvc on the other. If not, what other options do I have? Thanks again for your help.

Jeff

Yes, you can use larger cap to cap off the hub. I think 2" cast iron hub takes 3" rubber cap.

There is an old method that is still in some parts of the country allowed by Code: take old newspaper page, push it into the hub, mix little of dry concrete and insert it over newspaper plugging the hole in the process.

Quote:

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Originally Posted by Milo Dolezal

Yes, you can use larger cap to cap off the hub. I think 2" cast iron hub takes 3" rubber cap.

There is an old method that is still in some parts of the country allowed by Code: take old newspaper page, push it into the hub, mix little of dry concrete and insert it over newspaper plugging the hole in the process.

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Thanks for the answer. One follow up: Could I use a 3" to 2" no hub coupling from the cast Iron hum and run 2" PVC pipe to a sink drain from this joint? Thanks
Jeff