On Apr 6, 11:01*am, bob haller wrote:
On Apr 6, 10:49*am, JIMMIE wrote:









On Apr 6, 10:23*am, "RogerT" wrote:

I am going to be replacing a small section of underground sewer pipe that
runs from the front of my house toward the street. *The existing underground
sewer pipe is 4-inch cast iron. *I will be using PVC to replace the line
from the front of my house and connecting to that sewer line about 5 feet
out.

Can I use a Fernco coupling to connect the new PVC to the old underground
cast iron sewer pipe?

If not, how is that type of connection usually made?

I would check with manufacturer and local codes on this . My neighbor
used one as you said a few years ago and it ripped when they filled
the trench. He didnt know until his toilet started backing up a couple
of days later. Dont know if that is a problem with using coupling
underground or an installation problem. I think they may have
disturbed the ground under the new pipe too much.

Jimmie

ferncos are used here. in replacing the line its important to fill the
trench with sand or gravel before placing line *and get the slope
right and the line properly supported along its entire length, and
cover the new line the same as the bottom before backfilling espically
if the line is extra deep, you dont want to drop big rocks on the new
line.

kinda common sense things but lots of folks lack common sense

I kind of leaned more toward a screw up as the most likely cause too.
I bet if the OP googles bury Fernco he will get all the info he needs.

Jimmie