Need help installing a shower drain
I have installed an acrylic/fiberglass shower base on the second Floor (no underneath access) where there was a previous and very cheap shower base. The new base is now cemented and firmly in place. The 2" PVC drain extends into the drain- - it is a "caulkless" BK with a compression ring and tightening nut to seal. It is also, however, due to the previous installer, is at a slight angle and only a 1/2" on one side and 1 1/8" high on the other. The seal is a good one inch at least. Of course, when I compress the seal, the rubber ring compresses in and over the lip of the PVC pipe. My question is...Is this okay, if not, would it be okay if I used silicone on the rubber seal before and after compression. If neither of these is any good, is it possible to buy a 2" PVC extension that could be cemented inside the pipe and cut to the length I need? The previous shower leaked, which I don't want to go through again. At the same time, in my eagerness for completion, I've already cemented the base in. Thanks very much in advance for any help.
Regards,
John