Hayward Pump Strainer Cover O-Ring | SPX4000S Bispo If the heater will not

If the heater will not open gas flow

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the filter may seep water or become difficult to maintain safely

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Hayward Pump Strainer Cover O-Ring | SPX4000S Bispo If the heater will notWhat This Part Is Used For The Hayward SPX4000S is a strainer cover O ring used on compatible Hayward pump strainer lids. It seals the lid to the strainer housing so the pump can pull suction and maintain prime. This O ring installs at the pump basket lid sealing surface. Why This Part Matters A dry, flattened, or cracked lid O ring is a common cause of air leaks that show up as bubbles under the lid and weak circulation. Suction side air reduces