Splicing ABS Black Vent Pipe
 

I had to replace a shower faucet apparatus which went well, however someone placed the 1 & 1/2 " vent pipe right behind the faucet in the wall. I had to cut the black pipe (8 to 10 inches) so I could replace the faucet. Neither the upper or lower pipe will budge so I can put pipe and couplings on the existing pipe. I've never ran across anything like this before. Do they make unions or what. Any suggestions. Again, neither pipe will budge and it's tight quarters. Thanks

Use Fernco connectors (rubber sleeve with the SS clamps). Any home center or plumbing supply hose will have them. Fernco is a brand name and there are other suppliers.