Sand filter question

[kevincad]

Andrea,
Is this a one time event that the stuff shot out the returns or is it a recurring event? When you say the pump may be too big, how about some numbers like the pump info. Personally I don't know what size the T-60 is. Info on that would be helpful too, simply to not require looking it up. The sand on the floor does indicate an oversized pump as a possibility. Is there anything you did or changed that may be related to the incident?
Best for now.
Al

I've heard that you don't need to backwash your sand filter until you raise the pressure 5 PSI, is that correct? I just installed a new gauge, and I've been a week without backwashing, and it's only risen 1psi. Let me know what you think! Also, anyone know of a website with decent prices on replacement pump motors?

[Poconos]

Nothing sacred about the pressure rise for backwashing. I gather from reading here that some manufacturers state something for their filters. In fact, the more it plugs the better it filters, to a point. Not unusual with a clean pool to go a real long time without backwashing. Sorry...can't assist on a website for pumps.
Al