Miscut Shower Pan Liner - Can I Patch?

[tev9999]

I was installing the Oatey shower pan liner on my bathroom project tonight and ended up miscutting around an outside corner. I cut too deep and the cut went down into the pan corner beyond where a dam corner would cover.

I patched the corner (with a 2" overlap and X15 adhesive) and walked away for the night to let it set (and out of frustration). Is it safe to use this or should I pitch it and get a new liner?

Also, how important is it to smooth out all the folds in the pan liner? Since it shipped folded they are rather stubborn even after laying it flat for a couple days. Should I use adhesive to smooth it out and make it stay in place?

[Plumber111]

It can be glued with the X-15 adhesive. Make sure that you water test the pan and put the glued part under water.

I would recommend that you replace the whole pan though. Gonna' be under the tile and is the foundation of your waterproofing.

Make sure to pre-slope.

I've never seen a PVC pan installed by myself or anyone else perfectly smooth.

[tev9999]

Is there a way to plug the drain without investing $40 in an inflatable 2" test plug I will never use again? I have already sealed the liner to the drain bottom with silicone and tightened the top ring down.

[Plumber111]

You may be able to get one of these or a comparable locally for 2" I.D. pipe.

http://www.cherneind.com/Mechanical_Plugs/Default.aspx

[jadnashua]

Some people use a play balloon, but it's a pain blowing it up while in the drain. Give what's left to the kids when you're done, as you'll have most of a bag.

[tev9999]

I replaced the liner - much more carefully this time. The patch would have been right at some major folding and I didn't want to risk it to save $30.

I thought about the regular balloon, but didn't think it would be able to handle much water pressure. I don't think I can get a mechanical plug far enough down to clear the threads on the drain.