Hayward Pump Strainer Cover O-Ring | SPX4000S Bispo The 1-quart bottle supports phosphate

The 1-quart bottle supports phosphate management as part of a broader Pro Series maintenance regimen

If the heater will not open gas flow

the filter may seep water or become difficult to maintain safely

ideal for maintenance professionals and DIY pool care to restore normal wheel operation

Application: Sensor housing

Hayward Pump Strainer Cover O-Ring | SPX4000S Bispo The 1-quart bottle supports phosphateWhat 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