I lose prime in a number of situations.
Situation #1 - I have two pipes that bring water into the filter. One is the skimmer, the other is a pipe on a side wall, about 2 feet below the surface. I do not have a main drain. I have a valve that allows me to use both pipes, or just one at a time. If I go to using just one, then tons of air gets involved and I lose my prime
Situation #2 - when the pressure moves from 10 psi to 20-25 psi, I lose prime.
My assumption, in both cases, it that the pump is starving for water. I feel like the only solution is to get a pump that has "less of a need for water".
I am thinking about getting a whisperflow 2 speed filter, thinking that the low speed will not only save money, but will stop me from losing the prime due to "lesser needs for water".
When looking at both of those pumps, it seems that there is a "full rated" and an "up rated". No idea what the difference is here.