Saw my pump running at 37psi the other day and shut it off until I could address it. Yesterday I pulled the DE grids and cleaned them in a bath of Muriatic and water, then hosed them off and reinstalled. Expecting a return to normal pressures, I restarted the system, to no avail. As I watched, the water in the pump basket didn't flow smoothly through, but instead seemed to go through in "gulps". My first thought was that the impeller is jammed, but wouldn't that cause low pressure? A friend suggested that scale on the salt cell is the culprit but could it cause pressures that high?? (With apologies to Robert Palmer,) I'm just looking for clues....
Hal