Hayward | W3S310T2 | ProSeries 31" Sand Filter Top Mount

The Hayward W3S310T2 ProSeries 31" Sand Filter (Top Mount) delivers high-capacity filtration for large in-ground pools, combining durable construction with efficient performance. Engineered for superior water clarity, this filter uses advanced self-cleaning underdrain technology and a precision-molded tank to ensure long-lasting reliability and easy maintenance. Designed for top-mount installation, it’s built to handle heavy-duty use while keeping pool water sparkling clean.

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Key Features

• 31" tank diameter for high-capacity filtration

• Designed for in-ground pools and heavy-use applications

• Top-mount multiport valve for simplified control and operation

• Self-cleaning 360° underdrain for balanced water flow and maximum filtration efficiency

• Corrosion-proof, precision-molded polymer tank for long life

• Uses standard #20 silica sand (not included)

• Large pressure sand/water drain for quick winterizing or maintenance

• Integral top diffuser for even distribution of water over the sand bed

• Easy-to-read pressure gauge for quick system checks

• Designed for quiet, efficient operation

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Product Overview

The Hayward W3S310T2 ProSeries 31" Sand Filter is a professional-grade solution for keeping large in-ground pools clean, clear, and inviting. Its corrosion-proof tank is built to withstand years of exposure to the elements, while the advanced underdrain system and integral top diffuser ensure maximum filtration performance with minimal maintenance. The top-mount multiport valve allows easy control of all filter functions, and the large drain simplifies service and seasonal closing. Ideal for residential or commercial applications, this filter delivers reliable operation and crystal-clear water all season long.