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Hayward 21 inch Sandmaster Sand Filter
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Hayward 21 inch Sandmaster Sand Filter

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W3S210TC, formerly S210TC.

Product Name:
Hayward 21 inch Sand Filter
Product Code:
Filter Diameter:
21 Inches
1.5 Inch Slip Unions
Sand Required *:
200 lbs
1 Year(s)
Replacement Parts

* Important: Filter sand is not included with this product.

The Sandmaster filter features an integral top diffuser that evenly distributes unfiltered water over the sand media bed in a cascading, umbrella-like pattern. This allows the greatest filtration possible from every square inch of sand. Then the self-cleaning under drain assembly, with its 360° slotted laterals, provides a fast, balanced flow of clear water back to the pool while allowing for more thorough backwashing. Best of all, the Sandmaster's full-flow technology reduces your energy costs because the filter operates for shorter periods.

These high-performance pool filters combine rugged construction, energy-efficient operation and superior flow rates for years of trouble-free filtration with minimal care.

The weather-proof tank is constructed of a tough color-fast polymeric material and topped with a patented easy to use multi-port valve.

All Sandmaster pool filters feature an integral top diffuser, self-cleaning underdrain and 360 degree slotted laterals to ensure even water distribution over every square inch of sand, thorough backwashing and totally balanced flow for crystal clear water.

This advanced full flow technology reduces energy costs by obtaining maximum filtration, so you can run your filter less.

  • 1.5" Inlet and Outlet port
  • 3' of hose included
  • Sand Required - 90 KG / 200 Pounds, not included
  • Design Flow Rate 98 GPM

1 Year Manufacturer Parts Warranty

Warranty Coverage: Hayward Sand Filters come with a 1 Year Limited Manufacturers Warranty. The manufacturer of this filter warrants this filter against defects on workmanship and materials. This warranty will be void if this filter is damaged as a result of improper installation or use, or if damage is a result of ice. Warranty does not cover any labour charges, cost of lost water or chemicals, or any other damages that may occur.

Start a Warranty Claim:To begin a claim please email [email protected] with a photo showing the defect(s)/damage to your Hayward Sand Sand Filter and include a brief explanation of what occurred.


Does the job it’s needed to do !

Written by Tim A on September 5, 2022

Verified Review

The delivery came before the ETA, great service!

Written by Deborah K on June 20, 2022

Verified Review

Works amazing

Written by Michelle W on June 4, 2022

Verified Review

Written by Gary H on August 21, 2021

Verified Review

Easy to install and winterize, especially with Filtra Balls. The pressure gauge may be sensible to extreme cold. It was left in the pool's shed last winter and at the end of April it was showing about 40 PSI when not yet installed. Got a new one for 3$ from a local hardware store, not very trusted so I have opened the defective one and adjusted by hand - like new :) The point is: this filter valve is very easy to remove so at the pool closure better move it somewhere protected from the extreme cold.

Written by Adrian D on June 5, 2020

Verified Review

It’s a works great. However to pressure it’s rated for is different then what showed up and I emailed for a reply and didn’t get one. Also I ordered the filter balls and what an amazing deal! Noticed a few differences right away. Wish it came with a bag to wash them in once in a while.

Written by Rick S on May 16, 2020

Verified Review

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Hayward 21 inch Sandmaster Sand Filter $469.99