We use one at work, but since our sink is a friggin long way from some of the tanks, we have approx. 150' of hose hooked up to the sucker. At any rate, I learned a valuable lesson in checking the strainer in the sink it drains into. That sink is a typical laundry-room sink, so it holds about 20 gallons of water, and the drain flows water quickly, so the first time I used it I thought nothing of it. I checked the strainer once early on, but realizing that it was fine, I just kept at it for a while. I remembered about 20 minutes later (after having gone through about another 4 or 5 tanks) and ran back to see the sink just barely beginning to spill over onto the concrete. Ironically, one of our other associates did something similar earlier that week, but instead of catching it just as it was going over, she caught it when there was already 30+ gallons of water on the floor... 