I installed the ball valve and I have it closed about 30%. As of the past two days it is running smoothly and the water in the sump and main tank are staying at a constant level besides evaporation.
'The pump is magnetically driven - it has no seals to wear and contains no oil.'
These are the exact words off my box. So is this better, if not I have a Catalina CA1800 I could use but I didn't think it would be strong enough.