ProSeries Plus 30" Sand Filter - Side Mount

Hayward

SKU: S310S

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

ProSeries high-rate sand filters are molded of durable, corrosion-proof material for long-lasting performance. They feature an advanced, self-cleaning lateral under-drain system for smooth, efficient flow and totally balanced backwashing. For crystal clear water with minimal care, pool professionals choose ProSeries.

Features and Benefits

  • Durable, flanged inspection cover provides convenient access to top of filter
  • Top diffuser ensures even distribution of water over the top of the sand media bed
  • Automatic air relief purges any trapped air during operation of the filter system
  • Unitized, corrosion-proof filter tank molded of rugged, colorfast polymeric material for dependable, all weather performance
  • Large pressure sand/water drain for rapid winterizing or servicing
  • 6-position Hayward® VariFlo® 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
  • Precision engineered umbrella-fold self cleaning laterals for balanced flow and backwashing, plus easy serviceability
  • EXPERT LINE products can only be purchased through your local pool professional or in-store.  Exclusions, other terms, and conditions may apply.

Exclusions, other terms and conditions may apply.

Backwash Flow Rate 370.9702 LPM
Brand Hayward
Cartridge No
Channel Expert Line
Design Flow Rate 98
Effective Filtration Area 4.91 ft.²
Filter Type Sand
GTIN 610377056816
Warranty - Labor None
Master Carton Qty 1
Number of Filter Elements N/A
Pallet Qty 1
Warranty - Parts 1-year
Pool Type In Ground
Pressure Gauge Yes
Product Dimensions 40 " x 30.5 " x 30.5 "
Sand Capacity 500 lbs.
Series Filters ProSeries
Shipping Dimensions 48.3 " x 32 " x 32 "
Shipping Weight 83 lb
Tank Type Polymeric Resin
Turnover - 10 Hours 58,800 GPM
Turnover - 8 Hours 47,040 GPM
Valve Included Not Included
Parts Details

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

Questions & Answers

13 answered question(s)

06/24/26

Q: RE: HAY S310S 30" SM PRO SERIES ...IS THE LATERAL BOTTOM VERTICAL PIPE SUPPOSED TO BE LOOSE WHERE IT ENTERS THE BOTTOM ELBOW ASSEMBLY ? 210-240-6823

A:
This is a press fit. It is not glued.

By Hayward Support

06/24/26

Q: What inter working parts are included with this filter. Lateral filtration upper and lower elbows, fittings and gaskets?

A:
Hi, this is a complete filter. All components necessary for the filter to function properly are included.

By Hayward Support

06/24/26

Q: Filter is leaking at bulkhead. Do you sell parts?

A:
Hi, we do not sell directly. You can find a local Hayward Authorized Dealer by clicking on the Dealer Locator tab on our home page of our website, Hayward.com Link to dealer locator: https://hayward.com/dealerlocator

By Hayward Support

06/24/26

Q: Step by step instructions on how to change the sand in a swim pro sand filter for a thirty three foot round pool.8am

A:
Hi, unless you are familiar with replacing the sand in this product we recommend you allow a professional to do the repair. You can find a list of them by clicking on the Dealer Locator tab on the home page of our website Hayward.com

By Hayward Support

06/24/26

Q: We need to replace the side mount WS3200 - what other items do you have that would work with the current connections we have?

A:
Hi, someone from our Technical Service Department will contact you via email.

By Hayward Support

06/24/26

Q: What is the advantage of S310S - side mount versus S310T2 top mount? Effective filter area is equal (4.91). Design flow rate are same (98). Sand required (500#). I have inground pool and can see advantage to side mount for water lift, but is it worth the cost differential?

A:
Hi, the biggest advantage with the side mount models is ease of service. You can take the top off the filter easily to access the sand when desired. Otherwise you would find the operation and efficiency the same.

By Hayward Support

06/24/26

Q: I have a S310S sand filter and I need to replace this filter. Is there a comparable model available that can replace my filter without changes in plumbing

A:
Hi, the S310S is still available. We do not sell direct, but you can find a list of local Hayward Authorized Dealers by clicking on the Dealer Locator tab on the home page of our website Hayward.com

By Hayward Support

06/24/26

Q: How does the manual air relief cap work? Do you need to bleed air out of filter after cleaning pump basket?

A:
Yes. Any time the plumbing system is opened you should bleed the air out of the filter.

By Hayward Support

06/24/26

Q: Is there a plug you need to unscrew to drain the water out of the filter? I’m aware of the cap you need to unscrew but there is an internal plug that prohibits the water from draining ?? Hayward S310S sand filter

A:
Hi, yes there is a plug and screen behind the cap. For help with this contact a local Hayward Authorized Service Center. You can find a list of them by clicking on the Dealer Locator tab on the home page of our website Hayward.com.

By Hayward Support

06/24/26

Q: Is there any "help" instruction on how to replace the SX242MA2 assembly?

A:
For help with this contact a local Hayward Authorized Service Center. You can find a list of them by clicking on the Dealer Locator tab on the home page of our website Hayward.com

By Hayward Support

06/24/26

Q: Can the filter model S310S filter medium be switched from sand to "cotton tails" balls? FlowXtreme CottonTails Filter Media. Tightly woven from polyethylene strands

A:
Hi, we only recommend #20 silica pool filter sand in our sand filters

By Hayward Support

06/24/26

Q: I need to replace lateral assembly with pipe

A:
Hi, if you have a S310S side mount sand filter the lateral assembly is SX242MA2 we do not sell direct, but you can find a list of local Hayward Authorized Dealers by clicking on the Dealer Locator tab on the home page of our website Hayward.com

By Hayward Support

06/24/26

Q: How often should sand be replaced on the Model S244S?

A:
Hi, generally you need to replace the sand in your filter every 3-5 years. This may be longer if you don't see a loss of clarity in the pool ,or shorter if you are continually having to backwash to keep the pressure in normal range

By Hayward Support