Nelsen 300,000 Grain Twin-Tank Commercial (NWS15) Water Softener

When demand is high and downtime simply is not an option, the NWS15 300K Twin Alternating system from Nelsen Water Solutions answers with two 300,000-grain mineral tanks working in alternation. The result is a continuous supply of soft water, one tank stays in service while the other regenerates, making this a top-capacity choice for large homes and light-commercial operations that move serious volumes of water.

Maximum capacity, zero interruption

Each tank features a Nelsen Water Solutions 1-1/2" time-clock control with commercial distributors, a gravel support bed for even flow, and high-capacity softening resin sized to the 300,000-grain rating. A 1-1/2" stainless steel electronic meter tracks real water usage so regeneration happens on demand, and a Nelsen 1-1/2" MAV (Motorized Alternating Valve) automates the handoff between tanks. That metered, alternating operation keeps soft water flowing continuously while avoiding the wasteful regen cycles of a fixed-timer system.

• Two 300,000-grain mineral tanks, twin alternating configuration
• 1-1/2" lead-free brass metered control valves
• 1-1/2" stainless steel electronic meter for demand-based regen
• Nelsen 1-1/2" MAV for automatic tank switchover
• Commercial distributors, gravel bed, and high-capacity resin per tank
• 30x50 commercial brine tank with Nelsen 484 safety valve, air check, overflow elbow, 5" brine well and cap

The system includes a large 30x50 commercial brine tank outfitted with a Nelsen 484 commercial safety valve, an air check, an overflow elbow, and a 5" brine well with cap, providing generous salt storage to match the system's output. Demand-initiated regeneration keeps salt and water consumption efficient even at this scale by cycling only when softening capacity is actually used. Correct sizing to your hardness and peak flow, along with regular salt maintenance, ensures both tanks stay at full output. For the most demanding residential and light-commercial water needs, this Nelsen 300K system is built to keep delivering.

Sizing a softener correctly avoids two common pitfalls: an undersized unit that regenerates too often and runs out of soft water during peak demand, and an oversized one that regenerates so seldom the resin bed can foul. Calculating capacity from your measured hardness and daily consumption lands you in the efficient middle ground. With the right size and routine salt maintenance, this Nelsen system delivers consistent soft water while keeping operating costs in check.