Nelsen 150,000 Grain Twin-Tank Commercial (NWS15) Water Softener

Stepping up in capacity, the NWS15 150K Twin Alternating system from Nelsen Water Solutions pairs two 150,000-grain mineral tanks to supply uninterrupted soft water for busy households and light-commercial applications. Its twin-tank design keeps one tank softening while the other regenerates, so the supply of conditioned water never pauses, an important advantage in homes where demand can spike at any hour.

Higher capacity, always on

Each mineral tank is built on a Nelsen Water Solutions 1-1/2" time-clock control with commercial distributors, a gravel underbed that promotes even flow through the resin, and high-capacity resin sized to the 150,000-grain rating. The 1-1/2" stainless steel electronic meter tracks real water use, triggering regeneration only when capacity has actually been consumed, which trims salt and water waste compared with simple timer-only operation. The Nelsen 1-1/2" MAV manages tank alternation automatically, so the system requires no manual intervention to keep soft water flowing.

• Two 150,000-grain mineral tanks, twin alternating layout
• 1-1/2" lead-free brass metered control valves
• 1-1/2" stainless steel electronic meter for usage-based regen
• Nelsen 1-1/2" MAV (Motorized Alternating Valve) for automatic switchover
• Commercial distributors, gravel bed, and high-capacity resin per tank
• Commercial brine tank with Nelsen 484 safety valve, air check, overflow elbow, 5" brine well and cap

The system ships with a fully outfitted commercial brine tank featuring a Nelsen 484 commercial safety valve, an air check, an overflow elbow, and a 5" brine well with cap. As with any twin-alternating system, matching the 150,000-grain capacity to your water hardness and daily demand is key to getting efficient, reliable performance, and regular salt maintenance keeps both tanks at peak readiness. For larger homes that demand always-on soft water without the downtime of a single-tank unit, this Nelsen 150K system is a dependable, higher-capacity solution that scales with serious water use.

Proper installation pairs the system with a bypass so the unit can be isolated for service without shutting off water to the home, and locates it ahead of the water heater to protect that appliance from scale. A nearby drain for regeneration discharge and a grounded outlet for the control are also required. As with any softener, a recent water analysis covering hardness, iron, and pH ensures the system is set up correctly for your specific supply from day one.