Originally Posted by GNorman
so far, our water level in the DT has been too hight.... almost about to go over the teeth in the over flow. i think its b.c our pump is pumping more than its draining, its already coming through a 1 inch return line, I'm going to have to dial back the ball valves and see if that helps but I'm nervous b.c we got a pretty powerful pump and i don't want to shorten up its span life too much.
I've seen debate over this issue (ball-valves shortening pump life), but one side of the arguement is that as far as the pump is concerned, a partially closed ball-valve downstream is no different that having to pump up to a higher head.
Now, would a pump having a head of 8' inherently have a shorter life (potentially) than the same pump with a 4'-head?