Posted 7/6/2020 22:14 (#8358438 - in reply to #8358200) Subject: RE: Drain plug under water weight
Pittsburg, Kansas
That is a good point.
The assumption was that the pressure below the plug was atmospheric pressure. If it is something different then the pressure against the plug would be different like you say. If there was water under the plug with no pressure differential then it would just be the weight of the plug.