Andrew M
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I am at the end of building a master bath. I used 3" PVC for toilet, shower (2") and sink (1 1/4") feed into this. The existing soil stack is 3" copper to municipal sewer. I intend to tie into the 3" copper vertical drop with my PVC. In talking to a plumber a while back he said when I do this to use a fernco and a compression. Question is, I am not quite sure what he meant, and am planing on tieing to a 3" sanitary T and gluing a few inches of 3" pvc above and below, then cut out that amount of 3" copper and use connectors to put it all together. Sooo, do I use fernco on top and bottom , or was there something in his message abount a compression and a fernco that I am missing?