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ProSeries 21" Sand Filter - Side Mount (1 1/2" VariFlo Valve Included) (Open Line)

Hayward

SKU: W3S210S

ProSeries top-mount and side-mount sand filters provide long lasting performance.

Features

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 and Benefits

  • Durable corrosion proof materials for dependable all weather performance
  • Large pressure sand/water drain for rapid winterizing or servicing
  • Top-mount models are available with 7-position or 6-position VariFlo™ control valve
  • Side-mount models are available with 6-position VariFlo™ or 2-position slide valve
Application New Construction, Renovation, Aftermarket
Backwash Flow Rate 44 GPM
Brand Hayward
Cartridge No
Channel Open Line
Design Flow Rate 44
Drain Port Size (Inches) 1.5
Effective Filtration Area 2.2 ft.²
Filter Type Sand
Footprint 20-1/2 x 20-1/2"
GTIN 610377401371
Warranty - Labor None
Master Carton Qty 1
Maximum Working Pressure 50 PSI
Number of Filter Elements N/A
Pallet Qty 8
Warranty - Parts 1-year
Pool Type In Ground
Pressure Gauge Yes
Product Dimensions 32 " x 20.5 " x 20.5 "
Product Height 32 in
Product Length 20.5 in
Product Weight 46 lb
Product Width 20.5 in
Public Design Flow Rate 44 GPM
Residential Design Flow Rate 44
Sand Capacity 200 lbs.
Series Filters ProSeries
Shipping Dimensions 39.5 " x 21.2 " x 21.2 "
Shipping Weight 49.4 lb
Side Clearance - Filters 18"
Tank Type Polymeric Resin
Turnover - 10 Hours 26,400 GPM
Turnover - 8 Hours 21,120 GPM
Valve Included 1 1/2" VariFlo
Vertical Clearance - Filters 18"
Parts Details

Click on the part number in the diagram to display the details.

Questions & Answers

4 answered question(s)

06/24/26

Q: Hi can I replace a s210s filter with an ac 246gs filter?

A:
Hi, filtration needs vary with location, and bather load. Contact a local Hayward Authorized Dealer for further assistance in choosing the right filter for your location. You can find a list of them by clicking on the Dealer Locator tab on the home page...

By Hayward Support

06/24/26

Q: Will this work with a 1hp super pump?

A:
It should work. If you are not sure contact a local Hayward Authorized Service Center to help determine the pump and filter you need for your pool.

By Hayward Support

06/24/26

Q: I am looking to replace my W3S200 with this filter. Can you tell me if this is good replacement model? Thanks!

A:
Hi, this should work fine.

By Hayward Support

06/24/26

Q: What model sand filter for 18,000 gal pool?

A:
Hi, the filter you reference (W3S210S) would be sufficient for an 18,000 gallon pool as it is designed to turn over 21,120 gallons in 8 hours. That being said, it has a design flow rate of 44 gpm, so you would need to verify that your pump is properly...

By Hayward Support