Hayward ProSeries Sand Filter Inground 27 In Top Mount 1.5 Inch Valve
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Hayward ProSeries W3S270T 27-Inch Top-Mount Sand Filter with 1.5-Inch Valve for In-Ground Pools
The W3S270T is the 27-inch ProSeries top-mount filter with a 1.5" Vari-Flo valve. At 3.70 sq ft of filtration area, 350 lbs of sand, and a 75 GPM design flow rate, it handles larger residential in-ground pools and high-flow circulation systems that would push the 24-inch models too close to their rated ceiling. For pools or pump outputs pushing toward or above 75 GPM, or where 2-inch plumbing is installed throughout, the W3S270T2 with its 2-inch valve provides better hydraulic efficiency at those flow levels.
Hayward W3S270T ProSeries 27-Inch Sand Filter Key Features
- 27-inch tank with 3.70 sq ft of filtration area - 350 lbs of sand and a 75 GPM flow ceiling. The larger sand volume extends backwash intervals compared to the 24-inch models at equivalent pool volumes, and the higher flow ceiling accommodates variable-speed pumps running at higher speeds for spa, water feature, or cleaning cycles.
- 7-position 1.5" Vari-Flo top-mount valve - Filter, Backwash, Rinse, Waste, Recirculate, Closed, and Winter. Integral sight glass and 360-degree flange clamp rotation for flexible plumbing alignment.
- Integral top diffuser - Cascading water distribution across the full sand surface for maximum use of the 3.70 sq ft filtration area.
- 360-degree self-cleaning laterals - Full-flow slotted laterals for balanced, energy-efficient backwashing across the larger 27-inch tank base.
- Full-size internal piping - Smooth internal flow path minimizes head loss through the filter body.
- Corrosion-proof reinforced thermoplastic tank - Durable all-weather construction for permanent outdoor in-ground pool installations.
- Large pressure sand/water drain - Full-size base drain for fast winterizing or sand changes on this larger tank.
Hayward W3S270T ProSeries 27-Inch Sand Filter Specifications
Sand not included. Use #20 grade silica pool filter sand only. Pool coverage depends on pump output at actual system head and turnover rate targets.
Hayward ProSeries In-Ground Sand Filter Lineup: W3S270T in Context
| Model | Tank | Mount | Sand | Flow Rate | Valve |
|---|---|---|---|---|---|
| W3S210T | 21 in. | Top | 200 lbs | 44 GPM | 1.5" included |
| W3S210S | 21 in. | Side | 200 lbs | 44 GPM | 1.5" included |
| W3S220T | 22 in. | Top | 250 lbs | 52 GPM | 1.5" included |
| W3S244T | 24 in. | Top | 300 lbs | 62 GPM | 1.5" included |
| W3S244T2 | 24 in. | Top | 300 lbs | 62 GPM | 2" included |
| W3S270T (this model) | 27 in. | Top | 350 lbs | 75 GPM | 1.5" included |
| W3S270T2 | 27 in. | Top | 350 lbs | 75 GPM | 2" included |
| W3S310T2 | 30 in. | Top | 500 lbs | 98 GPM | 2" included |
| W3S310S | 30 in. | Side | 500 lbs | 98 GPM | Not included |
Flow rates per Hayward published specifications. The W3S310S ships without a valve. The W3S270T2 uses the same 27-inch tank with a 2-inch valve.
Maintaining the Hayward W3S270T ProSeries 27-Inch Sand Filter
Backwash when pressure rises 8 to 10 PSI above the clean baseline. Switch to Backwash until the sight glass clears, Rinse for 15 to 30 seconds, then return to Filter. The 350 lb sand bed extends backwash intervals compared to smaller tanks under equivalent debris conditions. Replace sand every 3 to 5 years.
First Startup: Loading Sand
Fill the tank halfway with water before adding sand to protect the lateral assembly. Add 350 lbs of #20 silica sand gradually. Run a full Rinse cycle before switching to Filter. Record the post-Rinse pressure as the clean baseline.
Winterizing the W3S270T
Backwash before shutdown. Drain the tank through the base drain and leave the plug out. Set the valve to Winter to drain the valve body. In hard-freeze climates, blow out the valve with compressed air before storage.
Hayward W3S270T ProSeries 27-Inch Sand Filter Frequently Asked Questions
When should I choose the W3S270T over the W3S244T?
When your pump output at actual system head exceeds or regularly approaches 62 GPM, or when you want the longer backwash intervals that 350 lbs of sand delivers at larger pool volumes. The W3S270T's 75 GPM ceiling also gives variable-speed pumps more room to run at higher speeds for spa or water feature operation without pushing the filter into over-pressure.
What is the difference between the W3S270T and W3S270T2?
Same tank, sand capacity, and 75 GPM flow rate. The W3S270T2 ships with a 2-inch valve rather than 1.5-inch. Choose the T2 if your pool plumbing is 2-inch throughout, your pump output is near the 75 GPM ceiling, or you are matching an existing 2-inch installation.
Does the W3S270T include sand?
No. 350 lbs of #20 silica pool filter sand must be purchased separately. Fill the tank halfway with water before adding sand to protect the lateral assembly.
Can the valve be repositioned after installation?
Yes. The flange clamp design allows 360-degree valve rotation on the tank body so the inlet and outlet ports can align with existing plumbing without cutting additional pipe runs.