I like the one I got from autotopoff.com, it hasn't failed me yet. I have had to build a different bracket for my sump since it is a taller 29 gallon but it has worked well for over a year now. I don't know why but, When I had my ato reservoir ( a ten gallon tank and I would fill it all the way to the top, it would push the water up to the second float in the sump. Now that I have been using a 5 gallon bucket, I can fill it all the way up and it keeps the water level at the first float. I switched to the bucket because my son was carrying a toilet he had replaced in the house and hit the side of the 10 gallon, CRASH. Fortunately, I had a black plastic garbage bag around it and that held the glass from busting all they way out, minimal leakage.