How do you properly seal an old cast iron waste pipe? This pipe was for
a septic system used before the home was connected to the town sewer.
Right now, the previous owners broke off the pipe at the wall and
filled it with expanding foam insulation. The problem is, we have had
a lot of rain and the water table is very high. The pipe is now
leaking water onto the basement floor. I probably can not cap the pipe
because it is broken off and even with the wall. Any suggestions would
Well, really you ought to remove the thing entirely, but a short term
solution is one of those 4" rubber-plugs with metal plates on both
sides, and a bolt through the middle. You slide the whole plug into
the pipe, and crank the bolt tight, with pulls the plates together and
squeezes the rubber against the sides of the pipe.
That's exactly what I would do.
It's not needed, so concrete will make a permanent seal.
First dig out the foam, stuff newspaper in there if the cement will
run way down into the pipe. Fill it with the concrete and trowel it
smooth. Total cost less than $5 for a bag of redi-crete.
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