I'm looking to buy a square Schluter Kerdi tile-in shower drain for my current bathroom project. However, there are times when I would like to be able to plug this drain and allow some water to accumulate in the bottom of the shower.

I can't easily find any way to plug this square drain. Help?!

square shower drain

1 Answer 1


Why not simply use a large flat sink stopper?

sink stopper

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  • I've seen these, but I guess I've not been sure that they'd actually seal well to my oddly-shaped drain. I don't know how to test the seal without installing the drain, thus eliminating chances to send it back.
    – Xuor
    Mar 14, 2016 at 23:27
  • 1
    There are several types, some very thin that conform to the drain/sink. Water pressure helps press them intot he base. The biggest risk in your application (as opposed to a simple sink use) are the grout lines. They may make a tight seal and the associated water pressure a bit more problematic. Fuller grout lines would reduce the risk.
    – bib
    Mar 15, 2016 at 0:42

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