I have to replace an old cracked black 4" septic iron pipe with a new 4"
PVC pipe, and I'm struggling with how to get the connectors to fit. Say I
cut out the 10' piece and push the PVC 10' piece up there, but now I can't
get the 4" rubber pipe clamps into the connecting point. Anyone got an idea
for this? Can the rubber pipe clamp be forced down the PVC pipe a few
inches without damaging it?
Pipe is likely cast iron. You *may* be able to Sawzall it.
Renting a "snap cutter" is another choice.
One end of the CI pipe has a "hub" on it; I assume you will be
cutting one or more hubs out so you have plain pipe to deal with.
Yes, you can slide the No-Hub rubber insert
back over the PVC.
Slide the stainless band out of the way.
The section you cut out should be a hair over 10Ft,
maybe 1/2" longer. That will leave room for the
raised edge inside the rubber coupling.
Be sure to support the new pipe adequately with
I should have said that "Mission-style" rubber couplings
are more commonly used underground as they afford more
flexibility than No-Hubs. These have 2 clamps and no sleeve.
Any cut pipe ends should be dressed to remove sharp edges
which may cut the rubber.
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