O-510 | Aladdin Hayward NorthStar Strainer Cover O-Ring | SPX4000TS Hayward vacuum Fixed Access Cover { passive: true })

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Maintenance Of Chlorine Residual: When an initial residual has been established

more controlled access when opening the filter for cleaning

ensuring a seamless fit and optimal performance for your pool filtration system

O-510 | Aladdin Hayward NorthStar Strainer Cover O-Ring | SPX4000TS Hayward vacuum Fixed Access Cover { passive: true })The Aladdin O 510 Strainer Cover O Ring is engineered to match the original Hayward SPX4000TS seal used on NorthStar pump strainer lids, ensuring a tight, reliable barrier that prevents air leaks and maintains strong pump priming. Its durable, chemical resistant elastomer construction holds shape under pressure and frequent lid removal, helping preserve efficient water flow and stable suction. Sized for a clean, accurate fit in the NorthStar lid