I put an 18"x18" hole in my garage when I poured the concrete floor.
In the hole, near the top I've got 3" PVC drain pipe. As a separate
pour, I put concrete in the bottom of the hole. My plan is to put a
PCC elbow, pointing down, so water accumulating in the hole will drain
out once it reaches a certain level. Any dirt or stones will sit in
the bottom and won't clog the drain. So, basically I've got a
recessed 18"x18" concrete hole in my garage that'll hold water until
the water is about 2" deep, then it'll drain out.
My question is, how do I seal concrete so it'll hold water? It's
below the surface of the floor, under a grate, so I really don't care
what it looks like...I just want it to be water tight. What's the
best product to use? Is there some way to "rubberize" it?
AtDhVaAnNkCsE (thanks in advance)