To get a pool pump to prime, turn off the power, fill the pump basket with water, make sure the lid O-ring seals well, and restart with the suction side as simple as possible. If it still won’t prime, the usual causes are low pool water, air leaks on the suction side, a dirty strainer basket, or valves set in the wrong position.

Quick steps

  1. Shut off the pump at the breaker for safety.
  1. Open the pump lid, remove debris from the basket, and check the lid O-ring for cracks or flattening.
  1. Lubricate the O-ring with pool-safe silicone lubricant if needed, then fill the pump basket completely with water.
  1. Put the lid back on firmly and start the pump.
  1. If the pump does not catch prime, repeat the fill-and-restart process.

Easier priming tricks

  • Open only one suction line at first, usually the closest skimmer line, so the pump has less air to pull.
  • Set a multiport valve to Recirculate if your system has one, since that lowers resistance.
  • Open the air relief valve on the filter until water sprays steadily, then close it.
  • If the pump is stubborn, try one line at a time and then open the others slowly after prime is established.

Common reasons it fails

  • Pool water level is too low, so the skimmer sucks air instead of water.
  • The lid O-ring, drain plugs, or suction fittings are leaking air.
  • The strainer basket or skimmer basket is clogged.
  • A valve is partly closed or set to pull from too many suction lines at once.

When to stop

If the pump still won’t hold prime after a few tries, you likely have a suction-side air leak or a blocked line that needs inspection. Running a pump dry for long can overheat it, so don’t let it spin without water for extended periods.

One simple test

A good field test is to fill the pump pot, start on one suction line only, and watch the clear lid: if bubbles keep streaming in, that points to an air leak rather than a priming issue alone.