Hayward W3S166T 16" Pro Series Sand Filter. Hayward ProSeries top mount sand filters utilize a precision engineered umbrella fold self cleaning lateral system to provide efficient flow and evenly distributed water for totally balanced backwashing and long lasting performance. The ProSeries filter features an integral top diffuser that evenly distributes unfiltered water over the sand media bed, this allows the greatest filtration possible from every square inch of sand.

• Flange clamp has 360 degree rotationg valve to simplify plumbing.
• Integral top diffuser ensures even distribution of water over sand.
• Full size internal piping for smooth free-flowing performance.
• Unitized corrosion-proof filter tank molded of polymeric material
• Integral sight glass lets you see when backwash cycle is finished.
• Efficient multi-lateral under drain assembly
• 360 degree slotted self-cleaning laterals