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Discussion Starter · #1 ·
What is the proper connector or connection to use to connect ABS sewer line to Cast Iron sewer line underground? Both are 3".
 

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Doing it myself
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3" Banded coupling is what we would use in my area. Also known as a no-hub coupling.
 

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Plumb or Die!
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321 Posts
For underground, I use Fernco couplings. Similar, but thicker rubber, no stainless band, just 2 gear clamps. Just a personal preference, no-hubs are fine too.
 
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