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Hayward 16" Pro Series Top Mount Sand Filter with 1.5" Valve W3S166T
Hayward 16" Pro Series Top Mount Sand Filter with 1.5" Valve W3S166T
Powerful and efficient sand filtration system with a self-cleaning lateral design for even water flow, balanced backwashing, and long-lasting performance—ideal for pools, aquariums, and ponds.
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Upgrade your pool’s filtration system with the Hayward ProSeries W3S166T 16” Top-Mount Sand Filter, engineered for exceptional water clarity and long-lasting performance.
Featuring a precision-designed umbrella-fold self-cleaning lateral system, this filter ensures even water distribution, efficient flow, and balanced backwashing—all essential for a crystal-clear swimming experience.
Perfect for above-ground, on-ground, small in-ground pools, aquariums, or ponds, the Hayward ProSeries Sand Filter delivers high-performance filtration with minimal maintenance.
Whether you need reliable filtration for chlorine or saltwater systems, this top-quality sand filter is built to last.

⭐️⭐️⭐️⭐️⭐️
Customers love the Hayward ProSeries W3S166T for its reliable filtration, ease of use, and long-lasting efficiency.
Many highlight how it keeps their pool water crystal clear with minimal maintenance.
The self-cleaning lateral system ensures balanced backwashing, preventing clogging and extending the life of the filter.
Whether for a backyard pool or an aquarium, users appreciate its versatile compatibility and hassle-free operation.

- Precision-Engineered Self-Cleaning Lateral System – Ensures even water distribution and efficient backwashing for extended filter life.
- Versatile Compatibility – Ideal for above-ground pools, small in-ground pools, aquariums (salt or freshwater), and ponds.
- Reliable, High-Performance Filtration – Effectively removes dirt, debris, and impurities for clean, sparkling water.
- Durable and Low-Maintenance Design – Built for long-lasting efficiency with minimal upkeep.
- Top-Mount and Side-Mount Installation Options – Flexible setup for different pool systems.

- Brand: Hayward
- Application: Above Ground, Pool
- Shipping Dimensions: 16.3 x 16.3 x 34.5 inches
- Channel: Pool Equipment
- Commercial, Residential, or Professional: Residential
- Each Product Weight: 25 pounds
- Filter Control Valve: 7-Position, Top-Mount Vari-Flo™ Valve with Lever-Action Handle
- Filter Tank Molding Type: Molded Polymeric
- Filtration Area: 1.4 square feet
- Filtration Rate: 30 GPM/ft²
- Green or Energy Efficient Product: True
- Master Carton Quantity: 1
- Maximum Flow Rate: 30 gal/min
- Maximum Working Pressure: 50 psi
- Minimum Sell Quantity: 1
- Mounting Base: Injection-Molded Thermoplastic
- Mounting Type: Top
- Pallet Quantity: 12
- UPC Code: 0610377386906


Q: What size pool is this filter suitable for?
A: The Hayward ProSeries W3S166T is ideal for above-ground pools, on-ground pools, and small in-ground pools. It can also be used for aquariums (both freshwater and saltwater) and ponds, ensuring clean and balanced water in various environments.
Q: How often do I need to backwash the filter?
A: Backwashing frequency depends on pool usage and debris levels. On average, it’s recommended to backwash when the pressure gauge rises 8-10 psi above the clean operating pressure or every few weeks during peak pool season.
Q: Does this sand filter work with saltwater pools?
A: Yes! The Hayward ProSeries Sand Filter is compatible with both saltwater and chlorine-based pool systems, providing efficient and long-lasting filtration regardless of your water type.



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Hayward has been a trusted name in pool equipment for over 80 years, offering reliable solutions like variable-speed pumps, cartridge filters, salt systems, and pool automation. Whether you're upgrading or building new, Hayward products are built for performance and ease. At AquaDoc, we proudly carry a full range of Hayward pool supplies to help keep your pool running smoothly all season long.
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