Fleck Systems
80-450 GPM

​Nelsen Commercial Water Softeners with Fleck Controls - Whether your project is a low or high-rise office building, shopping mall, hospital, hotel, college lab, restaurant, casino... Nelsen can assist you with job specifications, submittals, sales and engineering drawings, sizing, and selection of the equipment. Nelsen Fleck Commercial water softeners are designed for commercial applications ranging from 168,000 to 1,950,000 grains of hardness removal capacity at flow rates up to 280 gpm. We manufacture pre-engineered single and multiple tank systems, with full documentation and O&M manuals.

Features & Benefits

  • ​Fleck 2900 Control Valve

    Made of high quality, lead free brass for a long reliable life. Hydraulically balanced pistons glide effortlessly along noncorrosive spacers and seals to precise positions. As Pentair improves these valves, the valve bodies may be manufactured with stainless steel or other materials.

  • ​Fleck 3900 Control Valve

    Made of high quality, lead free brass for a long reliable life. Hydraulically balanced pistons glide effortlessly along noncorrosive spacers and seals to precise positions. ​Continuous service flow rate of 250 GPM with a backwash of 100 GPM

  • ​High Capacity Resin

    ​A high capacity, conventional gel polystyrene strong acid cation exchange resin designed for use in commercial water softening equipment.

  • High Flow Distribution

    ​Plastomer Diffusers or Hub & Lateral systems offer highly efficient distribution and collection of water and regenerants in water processing equipment.

  • Choice of 7 or 12 Day Clock or Meter Initiated Regeneration
  • Designed for Single Tank or Multi-tank Systems, Alternating or Interlocking
  • Operational No Hard Water Bypass During Regeneration (for multi-tank systems)
  • Protective Nema 3R Enclosure is Water Resistant, Rain Tight, Corrosion Resistant and UV Stable
  • No Hard Water Bypass Piston
  • Lead-free Brass Valve Body For Superior Strength and Durability
  • Incorporates 2 Time-Tested Hydraulically Balanced Pistons to Independently Pilot Service Flow and Regeneration
  • Fully Adjustable 5-Cycle Control Delivers Controlled Up-flow Backwash, Down-flow Brining, Slow Rinse, Rapid Rinse and Down-flow Service
  • Available with 7 or 12 Day Timer or Meter to Control Regeneration
  • Easy installation w/plug-in wiring harnesses
  • Simple on-site Programming
  • Networks of up to 4 Valves
  • Top or Side-Mount Configurations

Additional Resources

Optional Equipment
  • Skid Mounting

    Nelsen Commercial Skids are pre-engineered and assembled, offering you a low cost of installation with start-up quick and easy. Skids have an epoxy primer with an enamel finish coat in safety blue. Systems are Skid Mounted with inter-connecting piping and headers with tank isolating valves and bypass available for filters or softeners.

  • ASME Logo

    ​ASME Code Tanks, fiberglass or steel can be specified when required, and can be spec'd to meet your specific application requirements.

  • ​PVC Commercial Salt Deck

    ​PVC Commercial Salt Decks are available for brine tanks 50" and under. A commercial brine grid that can endure the harsh environment of today's demanding water softening systems. The PVC grid plate and support structure are lightweight and corrosion resistant.

  • XT Controller

    ​XT - Advanced Electronic Controller - In Time Clock Delay mode, the XT will display the number of days until the next scheduled regeneration. Some meter delated types will display the volume remaining (SRV) minus the reserve. Once the volume remaining is zero, the display will start counting down the reserve volume and queue (RGQ) regeneration.

  • ​NXT Controller

    ​NXT Controller - Network controller uses on-board communication capabilities to link multiple valves (via off-the-shelf CAT3, CAT5, or better cables) for system types 4,5,6,7,9,and 14.

  • Interconnecting Piping

    ​​Interconnecting Piping/Headers - Interconnecting piping and headers for multi-tank systems are available in your choice of pipe materials: Sch80PVC; copper pro-press; and galvanized. Headers are available up to 4” with system total flow rates of 240gpm to 480 gpm, assuming 35-100 psi operating pressure and acceptable velocities of 6-12 ft/second.

Fleck 2900 & 3900 General Specifications


Model NumberResin TankResin QtyBrine TankCapacity RangeFlow Rate RangeBKW
NCS29-21021 x 627 cf24 x 50168k - 210k55 - 77 gpm12 gpm
NCS29-30024 x 7210 cf30 x 48240k - 300k60 - 95 gpm15 gpm
NCS29-45030 x 7215 cf39 x 48360k - 450k75 - 140 gpm25 gpm
NCS29-60036 x 7220 cf50 x 60480k - 600 k100 -140 gpm35 gpm
NCS39-30024 x 7210 cf39 x 48240k - 300k120 - 170 gpm15 gpm
NCS39-45030 x 7215 cf39 x 48360k - 450k155 - 210 gpm25 gpm
NCS39-60036 x 7220 cf42 x 60480k - 600 k185 - 250 gpm35 gpm
NCS39-90042 x 7230 cf50 x 60720k - 900k200 - 270 gpm50 gpm
NCS39-120048 x 7240 cf50 x 60960k - 1200k205 - 280 gpm60 gpm
NCS39-195060 x 7265 cf60 x 661560k-1950k213 - 275 gpm100 gpm

Capacity range based on 9 Pounds per Cubic Foot = 24,000 Gr. C.F. to 15 Pounds per Cubic Foot = 30,000 Gr. C.F.
*Capacities are based on resin manufacturer's data and are dependent upon influent water TDS, temperature, bed depth, and flow rates. All units set at minimum salt settings. When sizing units, use minimum capacity. All flow rates are in Gallons per Minute. All sizes for Resin and Brine tanks are in inches. Resin quantities stated in cubic feet. Additional specifications available in Brochure Download above.

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