Sand Filter W/Top Mount Valve 20" Tank - W3S210T



Part # W3S210T

By Hayward Pool Products



Part # W3S210T

Alternate Part #'s HAYW3S210T

Product Description

Inyo Recommended Filters


Hayward sand filters are the very latest in pool filter technology. Molded of durable, corrosion-proof polymeric material, they feature attractive, unitized tank construction for years of trouble-free operation with only minimal care. Pro Series sets a new standard for performance, value and dependability. 


  • In-ground pools of all types and sizes
  • In-ground spas--(residential or commercial)
  • Water features--(fish ponds, fountains, water gardens)


  • Flange clamp design allows 360 degree rotation of valve to simplify plumbing
  • Integral top diffuser ensures even distribution of water over the top of the sand media bed. Full-size internal piping provides smooth, free-flowing performance
  • Unitized, corrosion-proof filter tank molded of rugged, colorfast polymeric material for dependable, all-weather performance
  • 6-position Hayward Vari-Flo control valve with easy-to-use lever-action handle lets you dial any of the 6 valve/filter functions. Integral sight glass lets you see when backwash cycle is completed
  • Efficient, multi-lateral underdrain assembly, with 360 degree slotted, self-cleaning laterals, gives totally balanced flow and backwashing
  • Integral molded drain plug for easy draining of tank, without the loss of sand 

Click here for more Hayward Filters

Product Specifications

Plumbing Size:
1-1/2 in.
Sand Required:
200 lbs.
Flow Rating:
44 GPM
Filtration Area:
2.20 sq. ft.
Valve Location:
Valve Type:
Turnover 8 Hrs.:
21,120 gal.
Turnover 10 Hrs.:
26,400 gal.
20-1/2 in.
38 in.

?     Asked on 5/4/2021 by

How much sand does this hold?

A  Answered on 5/4/2021 by InyoPools Product Specialist Danny R.

This swimming pool filter requires 200 lbs of sand.

?     Asked on 5/25/2020 by Rick

What size is the drain cap?

A  Answered on 11/4/2020 by InyoPools Product Specialist Hector F.

Hi Rick, the part number for the drain cap on this Hayward W3210T model sand filter is 4802-09B. The dimensions are 1-3/16" X 7/8". 

?     Asked on 2/12/2020 by Michael Hutter

I have a cartrige filter and want to change to a sand filter. What would be the pros and cons to do this ?

A  Answered on 2/12/2020 by InyoPools Product Specialist Lennox H.

Hi, Michael. Check out the Which Pool Filter Is Best? blog, it listed the Pros/Cons of all filters.

?     Asked on 7/29/2017 by Brad

I sent an e-mail earlier. I incorrectly calculated the size of my pool; it is actually only 24K gallon. I noticed that the Hayward S210T w/ 20" tank has a height of 38". Does that include the base and valve assembly? Also, how long does shipping take? I'm in a bit of a rush.

A  Answered on 7/30/2017 by InyoPools Product Specialist Alex V.

Brad, The 38" measurement is from the top of the valve handle to the bottom of the base. Shipping usually takes 3-8 business days. 

?     Asked on 5/10/2017 by frank

when I unscrewed the drain cap of my sand filter at the end of season the threaded nipple also had loosened up and it is dripping do I have to empty filter to hold back retaining nut inside of the filter and is there even a backing nut in there?

A  Answered on 5/11/2017 by InyoPools Product Specialist Lennox H.

Hi, Frank. There is not a locking nut on the inside of the filter.

?     Asked on 9/21/2016 by Mr. Rey Alejandro

I ordered a Hayward tank: Sand Filter W/Top Mount Valve 20" Tank - S210T confirmation does not indicate this is what was sent through ups..... Please check you order and advise this is what was shipped. I await your immediate response ??

A  Answered on 9/26/2016 by InyoPools Product Specialist Alan M.

Hello Mr. Rey, Your order shipped via UPS with tracking #1ZE051470313996754. Your order is scheduled to be delivered on Wednesday, 9/28. Thank you!

?     Asked on 7/4/2016 by Jim

I recently changed out my old sand in my Hayward pool filter. I started to replace it with the new filter sand, but the new pool sand is real fine compared to the old sand I took out. I am worried that the new sand will clog my laterals because it is finer than the old sand. Should I be concerned or is this perfectly normal sand for pool filters.? The sand I am using is "Quikrete No. 1153 Pool Filter Sand" purchased at Home Depot.

A  Answered on 7/8/2016 by InyoPools Product Specialist Lennox H.

Hi Jim, The "Quikrete No. 1153 Pool Filter Sand" is okay to use as long as the required amount of sand is used.

?     Asked on 5/27/2016 by william wilkinson

Can I take out the laterals and clean them ?

A  Answered on 5/27/2016 by InyoPools Product Specialist Patrick P.

Hi William, Yes you can remove the laterals to clean them and we have a Video on How to Remove Your Pool Filter Laterals which you may find helpful.

?     Asked on 5/27/2016 by william wilkinson

Why is my filter returning sand to my pool

A  Answered on 5/27/2016 by InyoPools Product Specialist Alan M.

Either your standpipe or your laterals cracked and chances are it’s one or more of the laterals located at the bottom of the standpipe. The standpipe is pretty thick and harder to crack than the laterals at the bottom, and only one of them needs to crack in order for it to leak sand into your pool.

?     Asked on 2/13/2016 by

I have a 27 ft round above ground pool is this filter correct for this pool. the pump is 1.5 hp and the plumbing is 11/2 pvc. Right now it has a de filter which worked alright but I live in the south and it was consent cleaning due to the high pollen.

A  Answered on 2/17/2016 by InyoPools Product Specialist Alex V.

Hello, The Hayward 20" tank will work with your size pool. Please keep in mind that you may need to get a new pump. An above ground d.e. filter uses a "horizontal discharge" or a "side discharge" pump. An above ground sand filter uses a "top discharge" or a "vertical discharge" pump.

?     Asked on 9/20/2015 by

how do you winterize the sand filter

A  Answered on 9/22/2015 by InyoPools Product Specialist Lennox H.

Hi, You can find winterizing instructions in the Hayward Pro Series High Rate Sand Filter Manual.

?     Asked on 7/19/2015 by James

We purchased our house a couple of months ago, it came with an 11,000 gallon above ground pool with a Hayward Pro Series High rate sand filter. (s210T ). Everything was working fine up until a couple of weeks ago. Now when I vacuum the pool I can see the dirt and green algae being blown back in after a couple of minutes. I have it on the filter setting like it is supposed to be and I have backwashed and rinsed but it is still shooting everything back in the pool. Please help.

A  Answered on 7/19/2015 by InyoPools Product Specialist Hector F.

If there is too much algae or dirt in the pool then older sand may not efficiently filter these organics and such out. Its wisest to vacuum this debris directly out of the pool keepng the multiport in the waste position then using the filter to grab the rest of the impurities. Also make sure that the pool has enough water when performing this task. Lastly please be advised that sand should be changed anywhere between 5-10 years.

?     Asked on 10/3/2014 by Guest

My valve needs to be replaced. Is the part SP0714T correct?

A  Answered on 10/3/2014 by InyoPools Product Specialist Patrick P.

The SP0714T would be the correct valve for the S210T.

?     Asked on 1/21/2013 by Guest

I just replaced the sand in my filter. When I turned the pump on, a lot of sand shot back into the pool but there is little to no suction. What do I do?

A  Answered on 1/21/2013 by InyoPools Product Specialist Patrick P.

If you are getting sand back into the pool, that would be an indication that the laterals would need to be replaced. If I am understanding correctly, you lost suction after the sand was replaced. If so, you may want to check the line between the skimmers and the pump. The skimmer closest to the pump and filter should give you the strongest suction. You can also try blocking on of the skimmers to see if this helps.

?     Asked on 3/1/2012 by Guest

How often do I have to replace the sand in my filter? What is normal operating pressure?

A  Answered on 3/1/2012 by InyoPools Product Specialist Patrick P.

On a "fresh start-up" a filter would operate anywhere between 10-20 psi. As a general rule of thumb you only want to backwash when the pressure increases 8-10 psi. You want to make certain that the pump is being turned off whenever you move the handle on the valve. Once backwashing is complete (3-5 minutes), you can switch to the rinse option to re-settle the sand bed. Sand will typically last 5-7 years. Premature backwashing will wear down the size of the sand which will cause difficulties such as cloudy water and higher operating pressures.

?     Asked on 1/27/2012 by Guest

When should I change the sand in my filter?

A  Answered on 1/27/2012 by InyoPools Product Specialist Patrick P.

You should change the sand in your filter every 5-7 years. You can generally tell that it is time if your pool water is not as clear as it normally is or when you notice the interval between backwashes is shorter. You can use > this guide to walk you through it.


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