Pump loses prime after a few minutes of running; pump basket runs dry and water stops flowing.

Safety first: Turn off power before opening the pump or adjusting plumbing.

• 1. Inspect pump lid and O-ring: Remove the lid, clean the sealing surfaces, and inspect the O-ring for cracks or flattening. Replace if damaged and lubricate lightly with silicone-based lubricant.
• 2. Tighten unions and fittings: Check suction-side unions at the pump and any nearby fittings. Hand-tighten firmly; do not overtighten with tools as this can crack fittings.
• 3. Check for visible leaks: With the pump running, look for small air bubbles under the lid and at the returns. Use a soapy water solution on suspected joints; bubbles being drawn in indicate a leak.
• 4. Inspect suction valves: Ensure valve stems and seals are intact. Replace worn valve O-rings or the valve if it is drawing air.
• 5. Verify water level: Make sure the pool water level is at least halfway up the skimmer opening so the skimmer does not suck air.