Sand Filter with Top Mount Valve 30 Inch Tank - S310T2



Model # S310T2

By Hayward Pool Products

  5 Average  



Model # S310T2

Warranty 1 Year

Product Description

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:
2 in.
500 lbs.
Flow Rating:
98 GPM
Filtration Area:
4.91 sq. ft.
Valve Location:
Valve Type:
Turnover 8 Hrs.:
47040 gal.
Turnover 10 Hrs.:
58800 gal.
30-1/2 in.
48 in.
Sand Required:
500 lbs.

?     Asked on 9/26/2016 by Kelly

I want to install new S310T2 Top mount sand filter. The current motor size is 3HP. Is that to big?

A     Answered on 9/29/2016 by Scott W.

That filter can handle 98 gallons per minute, so it will depend on what the flow rate of your current pump. I will need to know the model of your pump, not the motor, and the distance from your pump to the main drain to calculate the flow rate.

?     Asked on 9/14/2016 by Leo C

I have a Hayward S310T2 with a cracked vari-flo valve. The model of the vari-flo valve is SP071620TFV. Will a SP071621 replacement valve fit my S310T2? Thank you.

A     Answered on 9/15/2016 by Scott W.

Yes, that is the replacement valve with 2" ports for that filter.

?     Asked on 7/15/2016 by

Do you sell S310 with 1 1/2" plumbing? Do not want to change anything on current system. Thanks

A     Answered on 7/16/2016 by Lennox H.

Hi, The S310T2 filter valve is only available with 2" ports.

?     Asked on 5/28/2016 by greg

I have a S310T Hayward sand filter that is about 10 years old. is the S310T2 the replacement model? Also the only reason I am replacing it is because the male fitting threads are wore out at the drain. are there any parts that can be purchased to plug the drain inside of the spout like a self tapping plug? Finally, does the model mentioned above come with the top rotating valve or is that sold separately? my valve # is SP071621

A     Answered on 5/29/2016 by Alex V.

Greg, The S310T2 will replace your older filter. The filter comes with a 2" valve.

?     Asked on 4/27/2016 by

I'm looking at the s310t2 pro series sand filter. I have a 22,000 gallon pool. My pump is a 3/4 horse. It seems to be efficient enough for the cartridge filter I currently have. Is the 3/4 horse pump adequate for this sand filter model?

A     Answered on 4/27/2016 by Lennox H.

Hi, A 3/4 hp pump is sufficed for the S310T2 filter.

?     Asked on 4/8/2016 by Kurt Hartle

I have the following: 36,000 gallon in ground pool 1-HP Hayward pump S310T (500 pound) Sand filter Seems like a lot more filter than needed AND thinking about a Variable speed pump..... am I going to have filtering issues with reducing the GPM?

A     Answered on 4/8/2016 by Lennox H.

Hi Kurt, You will not have a filtering issue when the rpm's are reduced.

?     Asked on 8/5/2015 by Patricia Winkles

I know I need 500lbs But what kind? There is the sand alternative Zeobest . Silica Sand #20 high rate what if it just says #20 grade 50 lbs it doesn't say high grade

A     Answered on 8/5/2015 by Joe S.

Hello Patricia, Yes 500 lbs of Silica filter sand. The superior alternative to sand - for better filtration & water quality! Start using Zeobest instead of sand in your sand filter. Using 100% natural minerals, Zeobest provides excellent water clarity, purity, and quality. Zeobest has nearly 9800 times more square footage than sand, enabling it to filter small particles down to 3 microns for exceptional water clarity - that's 10 times smaller than sand! This amazing filtering media also removes the ammonia produced from dead organic material in the water, reducing eye irritation and odor. Plus, it cuts down on chemical demand, saving you money on chemicals. Zeobest is easier to use than sand. You will only need one pound of Zeobest for every two pounds of sand your filter requires - half the effort! Since Zeobest has a greater capacity for particulates than sand, backwashing will be much less frequent.

?     Asked on 8/5/2015 by Patricia Winkles

how much sand does a S310T2 need to change the sand in the filter

A     Answered on 8/5/2015 by Joe S.

Hello Patricia this filter requires Sand:500 lbs. or going with Zeosand 250 lbs

?     Asked on 6/27/2015 by Ron

My in-ground pool holds approximately 18,000 gallons of water. What size sand filter do I need for this size pool?

A     Answered on 6/27/2015 by Hector F.

There are multiple different ways that you can go with this size pool. You need to be sure that the pump model that you have has a compatible gallons per minute rating to the filter. Generally speaking without knowing the pump model or system specifications to confirm, you may want to look to use a sand filter that is approximately 3 to 3.5 sq. ft. Please review all system specifications with us or a licensed contactor to confirm that all elements of the system are compatible.

?     Asked on 6/13/2015 by

My tank split at the seam. is it possible to purchase a tank only?

A     Answered on 6/13/2015 by Alex V.

Hello, It will be cheaper to replace the tank as a whole vs buying the tank by itself.

?     Asked on 6/2/2015 by

I need a decal for the top of selector value am having hard time finding one. I ask where i get my pool supplies and i was told to write hayward.

A     Answered on 6/4/2015 by Patrick P.

Yes we do carry this Hayward Filter Valve Label here.

?     Asked on 4/23/2015 by John Mac

Could you be so kind as to suggest whether a HAYWARD S310 TOP MOUNT FILTER would be suitable for a :- 13000-15000 galls water 2" plumbing & would it maintain enough pressure for the pop-up cleaners Thanks

A     Answered on 4/24/2015 by Robert M.

Hello John - The S310T2 would be suitable for your pool. The pop-up heads are dependent upon the HP of the pump. The S310T2 will have no effect on the pop-up heads.

?     Asked on 11/1/2014 by Roy Way

We have this filter. We are considering switching from chlorine to salt water pool. Will this shorten the life of the pool filter? How many years of service can we expect out of this filter? Thank you.

A     Answered on 11/3/2014 by Brian M.

Good afternoon Roy. A salt system will still be a chlorine pool, it just makes it now instead of you adding it to the water. The tank will be fine and not affected any more by the addition of the salt system. The balance of all chemicals is what extends or shortens the life of your equipment.  The tank should last 5-10 years, depending on the environment. The hotter or colder the weather, the harder it is on the tank material.  


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