ProSeries 21" Sand Filter Top Mount Hayward W3S210T
ProSeries 21" Sand Filter Top Mount Hayward W3S210T
Keep your pool water clean, clear, and easy to maintain with the reliable 21″ ProSeries Sand Filter. Shasta Pool Supply makes it simple to get professional-grade filtration at a great value, with fast shipping and trusted Hayward quality. The included Vari-Flo™ valve lets you switch between functions effortlessly, giving you strong, consistent water flow every time you run your system.
ProSeries 21" Sand Filter Hayward W3S210T
Built tough for years of use, the corrosion-proof tank and evenly distributed sand bed work together to deliver crystal-clear water all season long. Maintenance is quick thanks to the self-cleaning laterals and easy-turn valve that make backwashing a breeze. With dependable performance, this filter keeps your pool looking its best with less hassle.

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Key Features
- Easy-to-Use Vari-Flo™ Valve — Simple operation with seven filter functions for complete control
- Durable, Weather-Resistant Tank — Made from heavy-duty corrosion-proof materials built to last
- Even Water Distribution — Integral diffuser spreads water across the sand for better clarity.
Technical Specifications
- Flow Rate: 44 GPM for steady circulation
- Tank Size: 21-inch diameter, compact and durable
- Sand Required: Holds 200 lbs of #20 silica sand
- Max Pressure: Rated up to 50 PSI for reliable performance.
Specs
- Part Number: W3S310T2
- Manufacturer: Hayward
- Length: 20.5
- Width: 20.5
- Height: 38.0
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What our customers are saying
Very friendly and knowledgeable staff! Answered all of my questions and provided some information I wasn't aware of which was very helpful.
Very friendly and knowledgeable staff! Answered all of my questions and provided some information I wasn't aware of which was very helpful.
Wade L
Excellent products, Customer service is the best, They know there products. VERY HELPFUL !!
Excellent products, Customer service is the best, They know there products. VERY HELPFUL !!
Tom B
It was what I needed at a good price
It was what I needed at a good price
Brandon W.
FAQ
Our expert staff answers customer's most asked questions.
Can I use a salt cell with a sand filter?
Yes, a salt cell can be used with a sand filter. In fact, the two work perfectly together — the filter clears debris from the water, while the salt system sanitizes it for a clean, balanced pool.
When do I need to change my sand?
For best performance, replace the sand in your Hayward ProSeries 22" Filter every 3–5 years. However, if you notice cloudy water, faster pressure build-up, or frequent backwashing, it may be time for a change sooner.
What is the recommended duration for running my pool equipment?
There isn't a specific timeframe, but it's essential to complete a full water turnover within a 24-hour period. Utilizing pool equipment during off-peak hours can be cost-effective.
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