Flat drain stopper over shower drain

Why would anyone place a flat drain stopper over a shower drain?

Because they can? :smiley:

To stop the water. :stuck_out_tongue:

There was probably a lip or something at one point to make it easier to remove. Seems it has broken, deteriorated, whatever.

edit just looked again, that’s JUST a shower, LOL, my bad.

Poor man’s sauna. :wink:

To keep the smell away and control the gurgling sound from an improperly vented sewer line.

And there you go again with logic. :mrgreen:

Christopher, wins!!! Take the cover off and the SMELL will make you gag.

In AZ it is to keep the roaches from coming through the drain.

A home inspector was there before you, testing the shower pan, and forgot it?