Hayward | W3S166T | ProSeries 16" Sand Filter Top Mount w/ Valve

The Hayward W3S166T ProSeries 16" Sand Filter (Top Mount w/ Valve) is a compact, high-efficiency filtration system designed for above-ground pools and small in-ground pools. Built with a corrosion-proof tank and advanced self-cleaning underdrain technology, it delivers consistently clear water with minimal maintenance. The included top-mount multiport valve makes operation simple and convenient, even in tight equipment spaces.

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Key Features

• 16" tank diameter for compact pool filtration needs

• Includes top-mount multiport valve for easy operation and control

• 360° self-cleaning underdrain for balanced water flow and efficient filtration

• Corrosion-proof, precision-molded polymer tank for long-lasting durability

• Integral diffuser for even water distribution over the sand bed

• Uses standard #20 silica sand (not included)

• Large sand/water drain for quick servicing and winterizing

• Easy-to-read pressure gauge for fast system monitoring

• Quiet and energy-efficient operation

• Ideal for above-ground and small in-ground pool applications

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Product Overview

The Hayward W3S166T ProSeries 16" Sand Filter provides reliable filtration performance in a space-saving design. Its top-mount multiport valve allows for easy switching between filtration, backwash, and rinse modes, while the self-cleaning underdrain and integral diffuser ensure maximum efficiency and even water flow. Made from corrosion-resistant materials, the tank is built to withstand exposure to pool chemicals and outdoor conditions. Perfect for smaller pools, the W3S166T offers professional-grade water clarity with minimal upkeep.