U.S. Motors pool pump runs but has low flow; filter pressure is higher than normal.

Safety first: Turn off power and relieve filter pressure before servicing.

• Check filter pressure: Compare current pressure to the clean starting pressure. A rise of 8–10 psi indicates the filter needs cleaning.
• Backwash or clean filter: For sand/DE filters, backwash per manufacturer instructions. For cartridge filters, remove and hose off or chemically clean cartridges.
• Inspect return valves: Ensure all return-side valves are fully open.
• Check return fittings: Inspect eyeball fittings for obstructions like leaves or toys. Clear any blockages.
• Adjust pump speed: On U.S. Motors variable-speed pumps, avoid running at unnecessarily high RPM that may exceed the system's hydraulic capacity.