In article , terry wrote:
[snip]
At the end of a typical shower there is warm water in the tub about 4
inches deep, 15 to 18 inches wide and about 48 inches long. These are
probably a bit overestimated; but to continue ............. that's 0.3
x 1.5 x 4 cu feet of water = 1.8 lets say 2 cubic feet of water?

Never mind the energy issues -- you need to find out what's clogging your
drain!!