Hayward ProSeries W3S310S 30" Side Mount Sand Filter without Valve. ProSeries top-mount and side-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.

Features:

• Manual air relief for easy, manual release of air from system
• Efficient, multilateral underdrain assembly with 360 degree slotted, self-cleaning laterals, gives totally balanced flow and backwashing
• Integral top diffuser ensures even distribution of water over the top of the sand media bed
• Unitized, corrosion-proof filter tank molded of rugged, colorfast polymeric material for dependable, all weather performance
• Durable, flanged inspection cover provides convenient access to top of filter