What clearance is there? It looks like plaster was squished in there and may be in contact with the pipe behind.Any tricks
A coupling like this can be used, or also a "slip" coupling. The slip couplings are solvent weld (glued) and need to be installed quickly before the glue sets.
The rubber with metal wrap gives you more time to play with it.
That sounds nice and simple! I’ll see if I can source the parts at my local HDShielded couplings are "permanent" and suitable for burying in concealed places. There are 2" x 1.5" shielded couplings
available: https://www.homedepot.com/p/1-1-2-in-x-2-in-EPDM-Rubber-Shielded-Coupling-P3000-215/100372286.
One of those at the bottom, and another 1.5" x 1.5" at some convenient location higher up is all you need.
That’s amazing! Thanks for pulling that together! By “dress pipe” I assume you mean make sure there are no sharp edges or other things for debris to get caught on?How about this procedure?
- Cut the 2 inch ABS just below the failed coupling. Make cut pretty horizontal, and don't poke through the wall on the other side with your reciprocating saw. Dress end
- Cut the 1.5 inch about 8 inches higher than that. Let's presume it is 8 inches for purposes of discussion. Dress end.
- Clean out foam and outside of 2 cut pipes. Dig out enough space behind the 1.5 pipe for step 5 also.
- Build assy 1 as shown. Black is ABS about 7.8 inches long. Purple is regular ABS 1.5 inch coupling. Orange is rubber from P3000-215, which kreemoweet pointed to.
a. glue coupler to top of ABS pipe.
b. Lube pipe and rubber a bit with liquid dish soap. Slide rubber only up on pipe, as illustrated, with 2 inch opening down and 1.5 inch opening up.- Slide loose metal shield of P3000-215 up and out of the way on the 1.5 inch pipe. Temporarily secure with string, rubber band, tape, or whatever. Alternatively, the shield could be over the bottom of the ABS coupling during the install of assy 1.
- Drop bottom of assy 1 into the 2 inch pipe.
- Apply ABS glue to inside top of ABS coupling and bottom of ABS pipe, lift and twist. Wait until glue is strong.
- At this point, the bottom of assy 1 and the top of the 2 inch pipe are nearly the same level. Note the level with a marker or tape on the wall. Apply more dish soap, and slide the rubber down over the 2 inch pipe until the middle of the rubber is at your mark.
- Slide the metal shield down over the rubber. Tighten with a 5/16 socket to about 5 ft-lb.View attachment 45332
Yes. Also clean the outside of the pipes where the ABS coupling gets glued or the rubber coupling will slide.I assume you mean make sure there are no sharp edges or other things for debris to get caught on?
The rubber coupling will be seated as far down as possible on top of the 2”Yes. Also clean the outside of the pipes where the ABS coupling gets glued or the rubber coupling will slide.
Re-thinking the inserting the 1.5 into the 2 inch, maybe making assy 1 longer would be better to let pipe flex work for you.
Ahh... so no mark needed. You still may want a mark on the pipe to let you know when you can stop pushing.The rubber coupling will be seated as far down as possible on top of the 2”
I am pretty sure there is not an issue with that. I am not a plumber.Any issues if the 1.5” is left low(nested inside the 2”) as per the pic, once glued to the upper 1.5”
This is awkward, but...
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