Cleaning out your pool pump strainer basket is the single highest-leverage piece of weekly maintenance you can do. A clogged strainer starves the pump for water, drops circulation, kills your filtration efficiency, and — if ignored long enough — burns out the shaft seal and motor. The good news is that emptying the strainer is a 3-minute job and requires zero tools.
This tutorial covers a standard residential pump — Hayward, Pentair, Jandy, Waterway, Sta-Rite, and Astral all use the same basic strainer pot design.
When to clean the strainer
The most reliable signal isn’t a calendar — it’s the pressure gauge and the basket itself. Clean the strainer when:
- The basket is more than 1/3 full of leaves, hair, or debris.
- You see a visible drop in pool return flow.
- You hear the pump motor laboring or running louder than normal.
- Filter pressure starts running lower than your clean baseline (a sign water flow is restricted at the pump).
For most pools, that translates to a quick check every 5–7 days during swim season, and after every storm.
Step-by-step: cleaning the pump strainer
Switch the pump off at the timer, breaker, or controller. Wait 10 seconds for the impeller to fully stop spinning.
If you have a Jandy valve or ball valve on the suction side of the pump, close it before removing the lid. This stops water from siphoning into the pump pot while it’s open and makes the lid easier to wrestle off. If you don’t have suction valves, skip this step.
Most pump lids twist off counter-clockwise by hand. If yours is stuck, use a strap wrench — never pliers or a pipe wrench, which will damage the lid threads. Hayward Super Pumps and Tristars usually have a knob you turn instead of twisting the whole lid.
The basket sits in the pump pot with a handle on top. Lift it straight up. Dump the contents into the trash (not your skimmer, not your bushes — leaves and hair will end up right back in the pool). Rinse the basket with a hose and inspect it for cracks or broken tabs.
Remove the o-ring from inside the lid. Wipe it down, look for cracks or flat spots, and apply a thin film of silicone-based pool lubricant. If the o-ring is dried out, brittle, or won’t spring back, replace it — this is the #1 cause of pumps losing prime and sucking air.
Drop the basket back in, making sure it seats fully (the handle should sit flush with the top of the pot). Set the o-ring back in the lid. Hand-tighten the lid — do not use a wrench. Pump lids are designed to seal with the o-ring alone, and over-tightening damages the threads.
Get them fully open before powering the pump back on.
The pump should re-prime quickly — usually within 30 seconds if water didn’t fully drain out of the pot. If the pump struggles, see our guide on how to prime a pool pump.
When to replace the basket itself
Strainer baskets are inexpensive but critical — a cracked or broken-tab basket lets large debris through to the impeller, which is a much more expensive problem. Replace the basket if:
- Any of the support tabs are broken or chipped.
- You see cracks anywhere on the basket walls or base.
- The handle is broken or won’t snap securely.
- The basket is more than 7–10 years old — UV degradation makes plastic brittle over time.
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Check your strainer basket every weekend during swim season. It’s a 3-minute habit that prevents the most common — and most expensive — pump failures. If your pump still struggles to draw water after a clean strainer, your next suspect is the lid o-ring or a suction-side air leak.