Hayward ProSeries Sand Filter System Above Ground 16 In 1 HP Pump
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Hayward ProSeries W3S166T1580S 16-Inch Sand Filter System with 1 HP Pump for Above-Ground Pools
The W3S166T1580S pairs the 16-inch ProSeries top-mount filter with a 1 HP PowerFlo LX pump in a factory-matched system. The filter, 7-position Vari-Flo valve, pump, one-piece base, and two hoses all ship together — no separate pump research, no sourcing additional plumbing. If you only need the filter and already have a compatible pump, the W3S166T filter-only is also available.
Sand filtration requires no cartridge replacements, no D.E. powder, and minimal seasonal effort. A 2 to 3-minute backwash cycle when pressure climbs 8 to 10 PSI above baseline restores the sand bed, and the same #20 silica sand typically lasts 3 to 5 years before needing replacement.
Hayward W3S166T1580S ProSeries Sand Filter System Key Features
- 1 HP PowerFlo LX above-ground pump - Performance-matched to the 16-inch ProSeries filter for above-ground hose plumbing. Clear strainer cover for visible basket status; stainless steel shaft; thermal overload protection.
- 7-position Vari-Flo top-mount valve - Filter, Backwash, Rinse, Waste, Recirculate, Closed, and Winter positions. Integral sight glass confirms backwash completion. Flange clamp allows 360-degree rotation.
- Integral top diffuser - Distributes incoming water evenly across the sand bed to prevent channeling and maximize use of the full filtration area.
- Umbrella-fold self-cleaning laterals - Folding ball joint design allows easy access for servicing and ensures even backwashing across the full base of the tank.
- One-piece deluxe base - Stable platform for the filter and pump without a separate equipment pad.
- Two hoses included - Ships with the hose pack for connecting to the pool's skimmer and return fittings. No additional hose purchase needed for a standard installation.
- Large pressure sand/water drain - Full-size base drain for quick winterizing or sand changes.
Hayward W3S166T1580S ProSeries Sand Filter System Specifications
Sand not included. Use #20 silica pool filter sand only. Pool coverage depends on pump output at actual system head and turnover rate targets.
Hayward ProSeries Above-Ground Sand Filter Lineup: W3S166T1580S in Context
All six ProSeries above-ground sand filter products are shown below. Flow rates are Hayward published figures.
| Model | Tank | Sand | Flow Rate | Pump |
|---|---|---|---|---|
| W3S166T | 16 in. | 100 lbs | 30 GPM | Filter only |
| W3S166T1580S (this model) | 16 in. | 100 lbs | 30 GPM | 1 HP PowerFlo LX |
| W3S180T | 18 in. | 150 lbs | 35 GPM | Filter only |
| W3S180T92S | 18 in. | 150 lbs | 35 GPM | 1 HP PowerFlo Matrix |
| W3S180T93S | 18 in. | 150 lbs | 35 GPM | 1.5 HP PowerFlo Matrix |
| W3S210T93S | 21 in. | 200 lbs | 37 GPM | 1.5 HP PowerFlo Matrix |
W3S166T1580S, W3S180T92S, W3S180T93S, and W3S210T93S are pre-matched pump systems that ship with filter, valve, pump, base, and hoses. W3S166T and W3S180T are filter-only.
Maintaining the Hayward W3S166T1580S ProSeries Sand Filter System
Backwash when pressure rises 8 to 10 PSI above the clean baseline. Switch to Backwash, run until the sight glass clears, then Rinse for 15 to 30 seconds before returning to Filter. Sand typically needs replacing every 3 to 5 years.
First Startup: Loading Sand
Fill the tank halfway with water to protect the laterals, then add 100 lbs of #20 silica sand gradually. Run a full Rinse cycle before switching to Filter to flush fine dust before it reaches the pool. Record the gauge reading after the Rinse cycle as the clean baseline.
Winterizing the W3S166T1580S
Backwash before shutdown. Drain the filter tank through the base drain and leave the plug removed. Set the valve to Winter to drain the valve body. Remove both pump drain plugs to clear water from the housing. Disconnect hoses and store the full system indoors in a non-freezing space.
Hayward W3S166T1580S ProSeries Sand Filter System Frequently Asked Questions
Does the W3S166T1580S include sand?
No. The system ships with the filter, valve, pump, base, and hoses. 100 lbs of #20 silica pool filter sand must be purchased separately before the system can be placed in service. Do not use play sand or construction sand.
What is the difference between this and the W3S166T filter-only?
The W3S166T is the filter, valve, and base only — no pump, no hoses. The W3S166T1580S adds the 1 HP PowerFlo LX pump, one-piece base, and two hoses. Choose the filter-only if you already have a working above-ground pump; choose this system if you need everything in one purchase.
Is this system suitable for in-ground pools?
No. The PowerFlo LX pump is an above-ground pump designed for the higher plumbing resistance of hose-based systems. It is not suitable for in-ground pool plumbing.
Can the filter and pump be replaced independently?
Yes. Both components are individually serviceable. If the pump fails, it can be replaced with a compatible above-ground pump without touching the filter. If the filter needs attention, the pump can stay in place. Refer to the parts diagram for part numbers.
What electrical circuit does the pump require?
A GFCI-protected circuit is required. The pump accepts 115V or 230V — refer to the wiring label on the motor for the correct configuration. Never connect pool pump equipment to a circuit without GFCI protection.