This is a replacement Strainer Cover O-ring for Hayward NorthStar SP4000 and SP4000X Series Pumps (2008 and later). This o-ring is also identical to Anthony/Kim lens gasket 4447470.
This Hayward part is manufactured by a Poolweb partner to meet or exceed original manufacturer specifications. This item is fully compatible and interchangeable with Hayward part #SPX4000S.
