Finished up a bathroom today and installed a pop up drain assembly on new sink. The nut to tighten the drain assembly is off by about a 1/4 inch – tight in the back, gap in front. I am guessing that this is a defect in the sink because I haven't used this sink before nor been this far off with a nut.
Pop up came with a few crappy plastic gaskets. A combo of the gaskets and plumber's putty got it to drain without leaking but I don't feel right about it. Is this the normal way to deal with the issue, bigger gasket, other?
Extra explanation: Won't be back to the house until Tuesday so will try to explain better. A normal install would have the popup drain assembly 90 degrees from the bottom of sink (hole). You would tighten gasket with drain nut… boom done.
When I go to tighten nut (let's say no gasket yet) the nut cannot ever full tighten because one side hits well before the other. The gasket that came with it didn't help because it basically just extends the issue. So I put a massive amount of plumber's putty right under sink hole on the side that the nut doesn't hit. Then gasket, then nut. Works… but who knows if it gets knocked or a lot of use.
Best Answer
The plumber's putty will not work, pull it all out of there please. The pop-up assy. should have included a fairly thick tapered rubber gasket to seal against the underside of the drain hole. This gasket has a flat back for the "crappy plastic" washers to rest against, those are actually friction rings designed to let the nut spin freely and press up against the rubber cone washer. I think you are missing the rubber washer.
Plumber's putty should only be used to effect the seal between the upper drain trim ring and sink.