Nelsen 300,000 Grain Metered Commercial (NWS15) Water Softener

At the top of the metered single-tank lineup, the NWS15 300K Meter Mineral Tank System from Nelsen Water Solutions offers a commanding 300,000 grains of softening capacity through a high-flow 1-1/2" control valve. It is engineered for the largest residential and light-commercial demands, delivering soft water at volume while regenerating only as needed and leaving the brine side open for you to configure.

Top-tier capacity, metered efficiency

The mineral-tank package includes the Nelsen Water Solutions 1-1/2" metered control valve, commercial distributors, a gravel underbed for even flow, and high-capacity resin matched to the 300,000-grain rating. Metered operation is central to its efficiency: regeneration is initiated by measured consumption, so even at this large scale the system avoids the wasteful, schedule-driven regen cycles that drive up salt and water use in timer-only units. The 1-1/2" valve keeps flow rates high to serve demanding applications without restriction.

• 300,000-grain softening capacity
• 1-1/2" lead-free brass metered control valve
• Commercial distributors, gravel bed, and high-capacity resin included
• Demand-based regeneration to minimize salt and water use
• Brine tank ordered separately for flexible configuration
• Progressive Flow option: add CL-COM-34-12 cord plus a CL-NHBP-15 bypass per valve

Because the brine tank is ordered separately, you can select a salt-storage vessel that fits your space and refill habits rather than a fixed bundle, an advantage at this capacity where salt usage is significant. For Progressive Flow systems, Nelsen calls for one CL-COM-34-12 communication cord for the system and one CL-NHBP-15 no-hard-water bypass for each valve. Proper sizing to your hardness and peak flow, plus consistent salt maintenance, will keep this high-capacity unit performing. For demanding applications that need maximum single-tank softening, this Nelsen 300K system is built to deliver.

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.