Code: NI001540

$4,795.00 $9,195.00 List Price

In Stock!

  • Description
  • Specs
  • Warranty
  • Documents


  • Nitrate Removal System 9100 Twin 2.5: includes 3/4 inch or 1 inch pipe connectors, by-pass valve; 2.5 x 2 (each tank 2.5 cubic foot) cubic foot high capacity nitrate selective anion nitrate resin with 80000 grain capacity each (each tank removes approximately 32000 grains of nitrate as CaCO4); and Fleck 9100 115v control valve.
  • All the filter media you need for the system is included.
  • Nitrate levels in excess of 2 to 4 ppm are often a result of fertilizer run-off from agricultural operations or from leaking septic tank systems.
  • These automatic nitrate removal systems properly sized and maintained can reduce nitrate levels by 80%.
  • In place of toxic chemicals these systems regenerate with common water softening salt.
  • Sizing is important and a complete general mineral water analysis is recommended.
  • Sulfates affect performance and it is important to know the sulfate levels in addition to the nitrate levels.
  • Filter tank is certified one piece seamless polyester construction for long life.
  • Max pressure recommended is 100 psi.
  • Maximum water temperature recommended 100F.
  • Heavy duty Fleck 9100 twin-tank on-demand control valve perfect for light commercial or heavy-residential systems that require continuous nitrate-filtered water.
  • Five cycle control delivers controlled upflow backwash downflow brining slow rinse and rapid rinse all with nitrate-filtered water.
  • Very salt efficient because no reserve needs to be programmed with twin tanks the nitrate filter can start a regeneration immediately on demand.
  • Best nitrate filtration occurs with a maximum of 5 gallons per minute flow rate, but peak flow rates of up to 10 gpm are possible.
  • The backwash flow rate is 3.5 gpm.
  • Actual nitrate removal capacity depends on the total amount of nitrate and sulfates present in the water.
  • For assistance in sizing or selecting a nitrate system please email us with water chemistry information.


  • Filter tank diameter: 13 inches
  • Filter tank height: 54 inches
  • Height including control valve: 61 inches
  • Brine tank: 18 x 33 inches
  • 10 year Warranty on the filter tanks. All tanks are Certified & top quality.
  • 5 Year Warranty on the control valve. Made in the U.S.A.
  • 90 Day money-back guarantee less 25% Restocking Fee

Manufacturer: CWS

Manufacturer #: 91/16MB-80-B500

Download Installation Guide