Bought and fitted over the weekend. Much better than a mechanical float switch. My sump is leaking a lot due to the high groundwater in my area, but the hard pump I use is very reliable. What always fails is the mechanical switch. So instead of spending $$$ to replace the entire unit, I started by just changing the float switch. However, depending on the size of the fountain, the float switch will fail or get stuck in an obstruction and stop functioning properly. On the other hand, this thing is nice and compact. Tie it to a pipe, plug it in and you won't believe the amount of space you just freed up. When calibrating manually, I set it to 15 seconds just before the pump starts drawing air. So my pump is now doing fewer/more cycles and doing it reliably. Let's see how long this lasts. 3 times more expensive than a simple float switch, I hope it lasts at least 10 years.
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