By Hayward Pool Products



Model # W3S310S

Alternate Part #'s HPPW3S310S

Product Description

 Hayward Pro Series Side Mount Sand Filter 4.91 sq. ft Less Valve

Product Specifications

Multiport Valve:
No Valve included
500 lbs.
Flow Rating:
98 GPM
Filtration Area:
4.91 sq. ft.
Valve Location:
Filter Type:
Pool Type:
In Ground

?     Asked on 2/9/2016by Duane Rose

I am replacing a Hayward S240 filter for which I installed a new Hayward 1.5" Vari-flow valve, last season. If I purchase the Pro Series Sand Filter (4.91 sq. ft.), can I hook this valve up to the new filter? (Is the spacing between side arms the same? Is the height from the bottom of the base of the filter to the side fittings the same? Are the fitting sizes the same? What is the price for a new Hayward Vari-flo 2" valve for this filter?

A  Answered on 2/15/2016 by InyoPools Product Specialist Megan C.

Hi, Duane. The Hayward Pro-Series Side Mount Sand Filter MODEL# S310S suggest installing valve part numbers SP710X62 and/or SP715X62. The Hayward S-240 Sand Filters suggest using the SPX710X32 and SPX0715X32. It is best recommended to use the valve that is suggested by the Manufacturer's schematics. Click here to view the schematics of MODEL S310S and click here to view the schematics of the S240.

?     Asked on 6/23/2016by Ramesh Ragha

will push -pull valve fit on this sand filter.

A  Answered on 6/24/2016 by InyoPools Product Specialist Scott W.

Yes it would fit, you'll just have to match the right size ports. It'll either be 1.5" or 2"

?     Asked on 4/5/2017by Inyo Visitor

Do you sell the valve required for the S310S filter?

A  Answered on 4/5/2017 by InyoPools Product Specialist Patrick P.

Yes we do carry the valve for the Hayward S310S Sand Filter, if you have 1.5" plumbing going into your valve then you will require the 1.5" S310S Replacement Valve and if you have 2" plumbing going into your valve then you will require the 2" S310S Replacement Valve both of these valves are called multiport valves meaning they have 7 different positions the valve can be set to. There is also a more simple valve called a slide valve, the slide valve just has 2 positions filter and backwash. Here is the 2" Slide Valve for the S310S Filter the slide valve accepts 2" plumbing. So in short there are 3 valves that work on this filter and we carry all 3.

?     Asked on 7/4/2019by Theresa A Bruemmer

What size Hayward sand filter do I need for 10000 pool. The existing filter is a 4.9 but uses 300 pounds of sand and the 4.91 uses 500 confused. Pool is 22 years old.

A  Answered on 7/7/2019 by InyoPools Product Specialist Lennox H.

Hi, Theresa. The tank size and shape determine the surface area and sand required. This size filter is sufficient for a 10,000 gallon pool.

?     Asked on 10/29/2020by Aaron Flint

Will this filter work on a pool that is 77000 gallons or would I need 2 of them?

A  Answered on 10/29/2020 by InyoPools Product Specialist Joe S.

Based on the volume of water and needing two we would recommend two of the Triton C-3 TRC140 36" Heavy Duty Commerical Sand Filter(w/ out valve) - Black - 140342 with the Tandem 4" Two Filter Piping Kit SCH 40 - 146402.

  • Commented on 10/29/2020 by Product Owner

    Us there any Hayward sand filters that would work

    • Commented on 10/30/2020 by InyoPools Product Specialist Patrick P.

      Hi Aaron unfortunately there is not a Hayward Sand filter that is sold online that would work. The Pentair would be a great option as notated in the earlier reply.


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