Replacement for Hydropool Serenity Series (2 required), Length: 9-1/2", Diameter: 6", Bottom/Core: 3-1/4" ID, Top: Handle

Single replacement for Hydropool Pleatco X18-PHY25 filter used in the Serenity series hot tubs in 2020. 2 of these filters were used to replace the large Serenity Wave Filter P/N 4520035. Your hot tub model may require the sleeve adaptors Hydropool P/N 5005045 for these filters to fit, sold separately at most Hydropool spas dealers. Top View Outside Diameter 6" (152mm) Top Closed with Handle Side View Filter Length 9-1/2" (242mm) Washable Pleats Bottom View Outside Diameter 6" (152mm) Bottom Open Hole 3-1/4" (82mm) Compatible replacement for: Pleatco X18-PHY25 Hydropool 20 Hydropool 4520036