Originally Posted by sumpchump
Thanks for the advice, however the basement is not just one square room. It has multiple rooms and walls. Floor is concrete and not finished.
What's your plan if there are several low points?
You may want weep holes in the walls at the bottom to equalize the water level.
5 gals will give you a depth of 1/16" in an 11'x11' room.
And a marble will work if you first put down a large sheet of tempered Masonite or glass or Plexiglass. You are kinda' looking for an average slope. One site recommended a slope of 1 in 100, like a rain gutter, but that seems steep.
SUMP PUMP INSTALLATION:
Installation of a pump and its location will depend on the type of water problems you have and what the local plumbing and electrical codes require. If you install a pump only as a safeguard against an unexpected flooding situation, and have only a slight amount of water tinder normal conditions, locate the sump pump in the lowest part of the basement near an outside wall. Locating the sump in a low spot will assure that water will run to the sump.
. . .
If the water problem is really serious, you may need to cut out small channels in the floor to funnel the water into the sump. These channels should be more like depressions rather than trenches. Make them approximately 2" wide by about 1 " deep. Draw the position of the channels on the floor at the same time you lay out the floor for the sump system.