Hayward ProSeries Sand Filter Inground 27 In Top Mount 2 Inch Valve
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Hayward ProSeries W3S270T2 27-Inch Top-Mount Sand Filter with 2-Inch Valve for In-Ground Pools
The W3S270T2 is the 27-inch ProSeries top-mount filter configured for higher-flow plumbing systems. The tank, sand capacity (350 lbs), filtration area (3.70 sq ft), and 75 GPM design flow rate are identical to the W3S270T. The distinction is the 2-inch Vari-Flo valve, which reduces hydraulic resistance through the valve body at sustained high flow rates and is the correct choice when the pool circulation system uses 2-inch plumbing throughout or when a pump's output at operating head is near the 75 GPM ceiling.
At this filter size, the choice between 1.5-inch and 2-inch valve matters most in high-demand installations: large pools with high-output variable-speed pumps, systems with spas or water features that draw peak flow, and any installation where head loss across components is being minimized for energy efficiency.
Hayward W3S270T2 ProSeries 27-Inch Sand Filter Key Features
- 2-inch Vari-Flo top-mount valve - Larger port diameter reduces pressure drop through the valve body at the high flow rates the 27-inch tank is built to handle. The right choice for 2-inch plumbing systems and installations where pump output approaches 75 GPM.
- 27-inch tank with 3.70 sq ft of filtration area - 350 lbs of sand, 75 GPM flow ceiling. One of the largest single-tank options in the ProSeries residential lineup before stepping to the 30-inch models.
- 7-position 2" Vari-Flo top-mount valve - Filter, Backwash, Rinse, Waste, Recirculate, Closed, and Winter. Integral sight glass and 360-degree flange clamp rotation.
- Integral top diffuser - Even water distribution across the full sand surface for maximum filtration efficiency.
- 360-degree self-cleaning laterals - Full-flow slotted design for balanced backwashing across the full 27-inch tank base.
- Corrosion-proof reinforced thermoplastic tank - All-weather outdoor construction rated for permanent in-ground pool installations.
- Large pressure sand/water drain - Fast drainage for winterizing or sand changes on this larger tank.
Hayward W3S270T2 ProSeries 27-Inch Sand Filter Specifications
Sand not included. Use #20 grade silica pool filter sand only.
Hayward ProSeries In-Ground Sand Filter Lineup: W3S270T2 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 | 27 in. | Top | 350 lbs | 75 GPM | 1.5" included |
| W3S270T2 (this model) | 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 W3S270T uses the same 27-inch tank with a 1.5-inch valve.
Maintaining the Hayward W3S270T2 ProSeries 27-Inch Sand Filter
Backwash when pressure rises 8 to 10 PSI above the clean baseline. Run Backwash until the sight glass clears, Rinse 15 to 30 seconds, then return to Filter. The 350 lb sand bed at 27 inches typically extends backwash intervals relative to smaller tanks under comparable debris loads. Replace sand every 3 to 5 years.
First Startup: Loading Sand
Fill the tank halfway with water before adding sand. Add 350 lbs of #20 silica sand gradually. Run a Rinse cycle before switching to Filter to clear fine dust. Record the post-Rinse pressure as the clean baseline.
Winterizing the W3S270T2
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 W3S270T2 ProSeries 27-Inch Sand Filter Frequently Asked Questions
What is the only difference between the W3S270T2 and W3S270T?
The valve. The W3S270T2 includes a 2-inch Vari-Flo valve; the W3S270T includes a 1.5-inch valve. Tank, sand capacity, filtration area, and flow rate are identical. Choose the W3S270T2 when your plumbing is 2-inch throughout, your pump output is near the 75 GPM ceiling, or you are replacing a system originally plumbed with a 2-inch valve.
Does a larger valve increase the filter's flow rate?
No. The design flow rate is 75 GPM regardless of valve size. The 2-inch valve reduces head loss through the valve body itself, meaning the pump works slightly less hard to push water through the system at high flow rates. The filter's rated maximum is unchanged.
Does the W3S270T2 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.
When should I step up to the W3S310T2 instead?
If your pump output at operating head approaches or exceeds 75 GPM, the W3S310T2 (30-inch, 98 GPM, 500 lbs, 2-inch valve) is the appropriate next step. It also uses a 2-inch valve, so the hydraulic configuration is consistent for high-flow systems.