VEVOR FlashPure Sand Filter Pump, 14 in for Above Ground Pool, 0.75 HP 3500 GPH, Swimming Pool Filter System with Timer, 6X Faster Filtration, Media Installed, Leak-Resistant, Ready to Use Out of Box

Here is how to bleed air out of the filter basket: Power off the pump first. Open the filter basket lid and fill the pump with water. Close the lid firmly. Vent the valve until only water comes out, then switch back to Filter. Run the pump for 1 to 3 minutes. Check the seals if air keeps getting in. Thank you.

The water pump itself is safe to use, but the way it's powered is where the danger lies. While installing a fixed outlet is inconvenient and adds extra cost, it's standard practice to ensure your equipment is legal and compliant, and more importantly, to protect your family's safety.

No, this product is not suitable for your 20,000-gallon above-ground pool. For a 20,000-gallon pool, at least a 16-inch pump is needed; a 14-inch pump is too small.

We generally recommend replacing them every 4-6 months. You can clean these filter balls and reuse them.

There is no need to fill the sand filter with water; simply fill the water pump. Open the transparent cover on the water pump. If this answer does not resolve your current issue, please contact us again for assistance.