Pump runs but there is no water flow; the pump basket does not fill with water.

Safety first: Turn off the pump before opening the lid or unions.

• 1. Check water level: Ensure the pool water is high enough to cover the skimmer opening. Top up if necessary.
• 2. Inspect pump lid and O-ring: Remove the Espa pump lid, clean the O-ring and sealing surfaces, and apply a thin layer of silicone-based lubricant. Replace a flattened or cracked O-ring.
• 3. Tighten suction unions: Hand-tighten the unions on the suction side of the pump. Do not overtighten to the point of cracking.
• 4. Prime the pump: Fill the pump housing completely with water, reinstall the basket and lid, then restart the pump. Watch for a solid water column forming in the lid.
• 5. Check for suction leaks: If bubbles persist under the lid, inspect all suction-side fittings and joints for hairline cracks or leaks and repair or replace as needed.