This pump is perfectly sized for m (1/3 HP) and is only needed when I have a day or two of above average rain. It happened yesterday. It turns on when the water level in the sump is about 7 inches and takes about 15 seconds to lower it to about 2 1/2 inches. And that is the reason for the 4 stars. The description and photo state that it will decrease to 1 inch. This is the main reason I bought this pump as I don't want to leave too much excess water in the pool. I called the company and they said it would stay in the pool for more than two inches. There is no adjustment on the shift rod. This pump is also pretty quiet. Another reason I bought this item is that it is made in the USA in Minnesota. works for me
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