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Home Pool Pool & Spa Filters Hayward Pool & Spa Filters Hayward Pro Series Side Mount Sand Filter 30 inch Tank | Backwash Valve Required | W3S310S
NOTICE: The pool & spa industry continues to face industry-wide shortages on many products that most vendors expect to last late into 2022. We're allowing items to be purchased so that customers who choose to wait will have their order shipped when product is available. Most vendors are not providing any ETA on when items will be available. WE WILL EMAIL YOU RIGHT AWAY IF YOUR ITEM IS BACKORDERED. 

Hayward Pro Series Side Mount Sand Filter 30 inch Tank | Backwash Valve Required | W3S310S

Hayward Pro Series Side Mount Sand Filter 30 inch Tank | Backwash Valve Required | W3S310S Hayward Pro Series Side Mount Sand Filter 30 inch Tank | Backwash Valve Required | W3S310S

Parts AvailableParts Available
Platinum Preferred Manufacturer
  • Requires Purchase of Backwash Valve Sold Separately
  • Unitized, corrosion-proof filter tank molded of rugged, colorfast reinforced thermoplastic for dependable, all-weather performance
  • Precision-engineered umbrella-fold self cleaning laterals for balanced flow and backwashing, plus easy serviceability
  • Online part number W3S310S is the direct replacement for part number S310S.
Q & A
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Providing you with quality you can trust, the Pro Series high-rate sand filters incorporate the latest pool filter technology to ensure your pool is operating at its very best. Molded of durable, corrosion-proof reinforced thermoplastic, 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.

* 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
* Integral sight glass lets you see when backwash cycle is completed
* Large pressure sand/water drain for rapid winterizing or servicing
Product Specifications
Brand Hayward
Item Sand Filter
Series Pro
Filtration Area 4.91 sq-ft
Filtration Rate 98 gpm/sq-ft
Size 30 inch
Max Working Pressure 50 psi
Mounting Type Side Mount
Turnover 47040 gal at 8 hrs, 58800 gal at 10 hrs
Media # 1/2 Silica Sand (0.45 - 0.55 mm)
Media Required 500 lbs
Filter Tank Molded Polymeric
Mounting Base Injection Molded Thermoplastic
Vertical Clearance 18 inch
Side Clearance 18 inch
Underdrain 360 deg Self-cleaning slotted laterals, precision installed in ball-joint assembly

Tank Diameter
Valve Position
ClearPro Technology
Q & A
Start typing your question and we'll check if it was already asked and answered. Learn More
Browse 6 questions Browse 6 questions and 2 answers
What is the recommended pump or HP for this filter?
Brenda K on Jul 8, 2016
instruction manuel for model s310s?
A shopper on Jun 28, 2016
how to remove an air relief cap that was snapped off leaving half in place?
Breakinjim on Jul 31, 2017
How many pounds of sand does it hold?
Noles on Jun 18, 2018
BEST ANSWER: 500 lbs.
Will a 1HP motor be adequate to run with that filter?
A shopper on Aug 20, 2020
BEST ANSWER: The HP rating of the motor isn't as much a factor as the impeller connected to it. You need to check the flow rate on the motor assembly to match it to the flow rate on the tank. The tank has a filtration rate of 98 gallons per minute/ sq-ft. there are 5 sq-ft so roughly 500 gallons per minute is the maximum capacity. On the minimum side, a normal 1 hp motor is going to be low but you can make up for that with longer run times to filter the pool each day. also, with a smaller motor, you also lose pressure so if anything in your system monitors pressure then it may have problems as well.
What does the backwash valve look like?
A shopper on Jul 30, 2021
5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Rated 5 out of 5
perfect for what I needed
35,000 gallon pool on variable speed pump. A little overkill, but keeps my pool perfectly clean!
May 12, 2020
over 2 years ago
Rated 5 out of 5
Great service. Received part in a week. Always friendly and helpful
February 22, 2021
1 year ago
Warranty applies only to products that were purchased from Hayward authorized sellers. Pool Supply Unlimited is a Hayward Authorized Online Reseller.
See Warranty Information PDF for warranty details.
For Hayward warranty registration information, and to submit online, please visit www.hayward-pool.com
This information was updated on 4/22/2022. For the most current information and full warranty policy please visit www.hayward-pool.com

 Adobe Acrobat PDF Warranty Information
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Pool Supply Unlimited is an e-commerce company that loves water. We love to pump it, filter it, heat it, chlorinate it, light it up and stare at it while we're barbequing a fat, juicy steak. There are real pool professionals working here. Our guys have seen thousands of pools in their careers, no exaggeration. We are based in Southern California and can land most products to your door (within the 48 contiguous states) in less than a week.
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