Sta-Rite pool pump runs but has very low flow and the filter pressure gauge reads much higher than normal.

Safety: Turn off the pump before changing valve positions or opening filter equipment.

• Backwash or clean filter: For Sta-Rite sand filters, set the multiport valve to BACKWASH and run until water is clear, then RINSE and return to FILTER. For Sta-Rite cartridge filters, open the tank, remove cartridges, and hose them off thoroughly.
• Check return valves: Ensure all return-side valves are fully open and that any diverter valves are not restricting flow.
• Inspect heater and chlorinator: Check for clogged internal bypasses or scale buildup in heaters and inline chlorinators. Clean or service as needed.
• Re-test pressure: After cleaning, restart the pump and note the new filter pressure. Mark the clean pressure on the gauge for future reference.