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

Modern Design: Sleek lines with bohemian-style woven fibers to complement any outdoor space

the filter may seep water or become difficult to maintain safely

The BIGAX36-1 designation identifies the panel for accurate selection and pairing with compatible components

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