Hayward ProSeries 30" Sand Filter Side Mount | W3S310S

Product Overview The Hayward ProSeries 30" Sand Filter Side Mount W3S310S is a high-capacity residential sand filter designed for powerful, dependable pool water filtration. Built with a rugged, corrosion-proof polymeric tank and a side-mount configuration, this filter is ideal for larger in-ground pool systems that require strong flow performance and reliable water clarity. The 30-inch tank provides increased filtration area and sand capacity, helping trap dirt, debris, and fine particles as pool water passes through the sand bed. Its internal diffuser and precision-engineered self-cleaning lateral system support smooth water distribution, balanced flow, and efficient backwashing. Important: This model is the filter tank only and does not include the side-mount multiport valve. A compatible Hayward side-mount valve must be purchased separately. Ideal For Residential in-ground swimming pools Larger pool systems requiring a 30" sand filter Pool owners upgrading to a high-capacity side-mount filter Systems needing a side-mount valve configuration Replacement for Hayward S310S / W3S310S style filters Key Features 30" High-Capacity Sand Filter Tank The large 30-inch tank provides strong filtration capacity for larger residential pool systems and helps maintain clean, clear pool water. Side-Mount Design The side-mount configuration is designed for use with compatible Hayward side-mount multiport valves, giving installers flexibility based on plumbing size and system requirements. Durable Corrosion-Proof Construction The unitized filter tank is molded from rugged, colorfast polymeric material for dependable outdoor performance and long service life. Large 500 lb Sand Capacity With a 500 lb sand capacity, this filter provides a deep media bed for effective dirt and debris capture. Even Water Distribution The integral top diffuser distributes water evenly over the sand bed for consistent filtration and improved performance. Self-Cleaning Lateral System Precision-engineered umbrella-fold laterals provide balanced water flow and efficient backwashing while helping simplify service. Convenient Top Inspection Cover The durable flanged inspection cover provides convenient access to the top of the filter for service and maintenance. Easy Winterizing and Service A large pressure sand and water drain helps make draining, servicing, and winter preparation faster and easier. Benefits The Hayward W3S310S is a strong choice for pool owners who need a larger, dependable sand filter for residential pool systems. Sand filtration is simple to operate, easy to backwash, and requires less hands-on cleaning than many cartridge filter systems. With its 30" tank, 4.91 sq. ft. filtration area, 98 GPM flow rate, and 500 lb sand capacity, this model is built for high-capacity pool filtration when properly matched with the pump, plumbing, and valve. Specifications Specification Details Brand Hayward Series ProSeries Model W3S310S SKU W3S310S UPC / Barcode 610377387798 Filter Type Sand Tank Size 30" Mount Style Side Mount Valve Included No Compatible Valve Type Hayward side-mount multiport valve, sold separately Effective Filtration Area 4.91 sq. ft. Flow Rate 98 GPM Sand Capacity 500 lbs. Recommended Sand #20 silica pool filter sand Maximum Working Pressure 50 PSI Tank Material Corrosion-proof polymeric material Pool Type Residential in-ground pool applications Pressure Gauge Included Yes Filter Base Included Yes Sand Included No Compatible Valve Options Compatible side-mount valve selection depends on the pool system plumbing size. Plumbing Size Compatible Hayward Valve 1-1/2" Plumbing SP0710X62 Side-Mount Multiport Valve 2" Plumbing SP0715X62 Side-Mount Multiport Valve What’s Included Hayward W3S310S 30" ProSeries side-mount sand filter tank Filter base Internal lateral assembly Pressure gauge Side-mount multiport valve is not included. Pool filter sand is not included. Customer-Facing Q&A Does this filter include the valve? No. The Hayward W3S310S is a side-mount sand filter tank only. The multiport valve is sold separately. How much sand does this filter require? This filter requires 500 lbs. of #20 silica pool filter sand. Is the sand included? No. Filter sand must be purchased separately. What valve do I need for this filter? For 1-1/2" plumbing, use a compatible Hayward SP0710X62 side-mount valve. For 2" plumbing, use a compatible Hayward SP0715X62 side-mount valve. What is the flow rate? The Hayward W3S310S has a listed flow rate of 98 GPM. Is this filter suitable for large residential pools? Yes. The 30" tank, 500 lb sand capacity, and 4.91 sq. ft. filtration area make it a strong option for larger residential pool systems when properly matched with the pump and plumbing. How do I clean this filter? Cleaning is done by backwashing through a compatible side-mount multiport valve. Backwash when the pressure gauge rises approximately 8–10 PSI above the clean starting pressure. Does this filter include a pressure gauge? Yes. A pressure gauge is included.