

Our Commercial Twin Tank Water Softener is designed for businesses that demand an uninterrupted supply of softened water. Featuring a true twin alternating design, one tank remains in service while the other regenerates, ensuring soft water is always available—even during regeneration cycles.
Built around industry-leading Clack control technology, these systems are available with:
Each system is custom-engineered based on your water quality, peak flow requirements, and daily water consumption to ensure optimal performance and efficiency.
Unlike single-tank softeners that take the system offline during regeneration, a twin alternating system automatically switches to the standby tank when regeneration is required. This provides:
Full specifications, installation data and component drawings for our 3" commercial softener systems are in the spec sheet below.
Download the 3" Spec Sheet (PDF)
| Service flow rate | 250 gpm @ 15 psi drop |
| Backwash flow rate | 220 gpm @ 25 psi drop |
| Inlet / outlet / drain | 3" female NPT (BSPT available) |
| Tank connection | 6" flange or side mount |
| Operating pressure | 20–125 psi |
| Water temperature | 40–110 °F |
| Power | 120 V AC, 60 Hz |
| Flow meter | External 3" meter, 3.5–350 gpm, ±5% |
| Model | Resin Tank (in) | Brine Tank (in) | Capacity @ 9 lb/ft³ | Capacity @ 15 lb/ft³ | Resin (cu ft) | Service Flow (gpm) | Backwash (gpm) | Salt / Regen (lbs, 9 / 15) |
|---|---|---|---|---|---|---|---|---|
| WS3M-150 | 18 × 65 | 24 × 41 | 120,000 | 150,000 | 5 | 40 | 10 | 45 / 75 |
| WS3M-210 | 21 × 62 | 24 × 50 | 168,000 | 210,000 | 7 | 45 | 13 | 63 / 105 |
| WS3M-300 | 24 × 72 | 30 × 50 | 240,000 | 300,000 | 10 | 70 | 15 | 90 / 150 |
| WS3M-450 | 30 × 72 | 39 × 48 | 360,000 | 450,000 | 15 | 105 | 25 | 135 / 225 |
| WS3M-600 | 36 × 72 | 50 × 60 | 480,000 | 600,000 | 20 | 140 | 35 | 180 / 300 |
| WS3M-900 | 42 × 72 | 50 × 60 | 720,000 | 900,000 | 30 | 200 | 45 | 270 / 450 |
| WS3M-1200 | 48 × 72 | 50 × 60 | 960,000 | 1,200,000 | 40 | 250 | 65 | 360 / 600 |
Capacity in grains per resin tank. Tank sizes are diameter × height. Salt shown per regeneration at 9 and 15 lbs per cubic foot.
| Model | Space Required L × W × H (in) | Shipping Weight (lbs) |
|---|---|---|
| WS3-TA-300 | 86 × 30 × 90 | 2,045 |
| WS3-TA-450 | 107 × 39 × 97 | 2,995 |
| WS3-TA-600 | 130 × 50 × 99 | 3,935 |
| WS3-TA-900 | 142 × 50 × 110 | 6,075 |
| WS3-TA-1200 | 152 × 50 × 107 | 7,675 |
Each twin alternating model uses two resin tanks of the matching size above with a shared brine tank. Allow additional clearance for service access.
Every commercial application is different. To ensure proper sizing and performance, this product is available by quote only.
Our water treatment specialists will review:
Based on this information, we'll design a system tailored specifically to your facility.
Request a Quote Today and our team will provide a custom recommendation along with pricing, specifications, and expected lead times. See all commercial water softeners.