Hey folks,

I made a posting the other day describing how within 1 minute my filter goes above 10 PSI at which time I back wash it (according to manufacture instructions). At the suggestion of one of the the forum members, I'm letting it go longer now and only backwash at about 20-25 PSI (when the return jets barely spray).

So, after adding all the DE, pressure is about 15-17 PSI. I hoped to leave it on overnight, but I'm afraid it's going to rise above 25 PSI over night. My question is, if it does rise above 25 PSI but the pump still runs for another 8 hours after that, am I risking damaging the equipment? Or does it just mean that unfiltered water is reentering the pool and no harm done?

Thanks!