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View Full Version : Old Cast Iron in a wet crawlspace


grimproblems
Mar 22, 2008, 06:13 PM
I had to replace a cast iron T with an abs wye in my crawlspace.

I used the 4" fernco couplings and cranked the bands tight, but a very slow drip is still present. The cast iron is rusted and difficult to get a tight seal. What can I do to ensure a seal that won't leak?

hkstroud
Mar 22, 2008, 08:20 PM
Clean cast iron best you can with wire brush. Put film of silicone inside Fernco and reinstall.