On Sep 14, 2:12*pm, JTeller wrote:
Hi All,

Had a problem with the sewer system on the second floor.

Ended up opening up the wall on the first floor and had to cut out a
three-foot section of 4" cast iron sewer line. *Sealed up the system by
installing a 3-foot section of 4" PVC (sch-40) using two 4" Fernco
rubbers.

I can't get the Ferncos to seal. *The top Fernco weeps just enough to
show a moisture ring at the top. *The bottom fernco has significant
leakage at the bottom. *I tightened the clamps in stages with a
screwdriver and then switched to a ratchet with 1/4" bit. *The Fernco
rubbers are simply not sealing on the cast iron.

Ugh. *I'm at a loss. *How can I seal this beast and still be able to get
access in the future???

How rough is the surface of the cast iron pipe? Also, maybe you are
just being too weak in your tightening.