Crystal Quest Nitrate Plus Under Sink Water Filter

Crystal Quest Nitrate Plus Under Sink Water Filter
Crystal Quest Nitrate Plus Under Sink Water Filter
Crystal Quest Nitrate Plus Under Sink Water Filter

Crystal Quest Nitrate Plus Under Sink Water Filter


The Crystal Quest Nitrate Under Sink Water Filter System is a specialized solution for removing nitrates from drinking water. This system is equipped with the Nitrate Removal Water Filter Cartridge, and an optional Smart Cartridge or Carbon Block Filter. These components work together to ensure the elimination of nitrates, providing clean and safe drinking water on demand. Available in Single, Double, and Triple configurations, this dependable system is an essential investment for those concerned about nitrate contamination in their water supply. It's a vital tool for enhancing water quality and protecting health in residential settings.


Our Nitrate Under Sink Water Filter System reduces or removes contaminants such as Nitrate, chlorine & heavy metals from tap water to offer the freshest taste to you. The perfect solution for any household. It is quick and easy to install and use, attractive, convenient, and effectively removes many contaminants from water while increasing alkalinity & oxygenation.

This solid-state water filter uses the latest technologies that blend the adsorption capabilities of coconut shell-activated carbon with Eagle Redox Alloy® and more.

  • Installs neatly under the sink.
  • Comes with a beautiful faucet and all necessary installation hardware.

      When considering installation, if the current under-sink plumbing is hard copper tubing the saddle valve would be used; for flex tubing, the T-valve would be required.  Please let us know what one you need in the notes, if you don't let us know the T-valve will be shipped.

      Single comes with a Nitrate Filter

      Double comes with a Smart Filter and Nitrate filter

      Triple comes with a Smart Filter, Carbon Filter, and Nitrate filter

      Nitrate Removal Water Filter Cartridge

      Water travels through a Nitrate-selective media. Nitrate reduction is 90% to 95% and breakthrough is not affected by sulfate levels. The capacity is 3000 ppm (parts per million) of nitrates as CaCO3. To determine capacity, first, calculate the ppm of nitrates as CaCO3, then divide that number into 3000 to get the gallons. This cartridge can be regenerated using a sodium chloride brine.*

      Important Note: The nitrate cartridge in this system requires manual salinity regeneration. The regeneration process should be done every 20 to 30 days depending on level of nitrate. The media must be recharged in order to maintain optimum performance. If the media is not regenerated, then the media will exhaust and result in a permeate of 0. The cycle of regeneration will vary based on the influent level of nitrate.

      The process of regeneration involves dissolving salt in water (2-3 cups of salt for every 3-4 cups of water) stir well and soak (you may want to use something to hold the cartridge down) the cartridge for 1-2 hours, then soak the cartridge in tap water for an additional 1-2 hours, rinse with the tap running tap water and reinstall the cartridge. Regeneration is not required before its first use even if the cartridge has been unopened for a period of time.  

      SMART Water Filter Cartridge

      Water flows through a bed of media made of a special high-purity alloy blend of two dissimilar metals - copper and zinc (ERA-6500, ERA-9500). ERA-6500 and ERA-9500 are major advancements in water treatment technology that works on the electrochemical and spontaneous-oxidation-reduction (Eagle Redox Alloy®) principles. Chlorine is instantaneously and almost inexhaustibly oxidized.

      Water flows through ion exchange resins, reducing heavy metals such as lead, copper, aluminum, and water hardness.

      Water flows through granulated activated carbon (GAC). GAC is universally recognized and widely used as an effective adsorbent for a wide variety of organic contaminants, such as chlorine, chemicals linked to cancer (THM's, benzene) pesticides, herbicides, insecticides, volatile organic compounds (VOC's), PCB's, MTBE's and hundreds of other chemical contaminants that may be present in water causing bad taste and odors in your drinking water.

      All Crystal Quest® GAC is a mixed blend of coconut shell and catalytic GAC to address both chlorine, chloramines and these byproducts. 

      Carbon Block Water Filter Cartridge

      Water travels through a 5-micron solid carbon cartridge for removing volatile organic carbon compounds (VOC's), insecticides, pesticides and industrial solvents and traps particles larger than 5 microns including sediment, silt, sand, and dirt.

       Product Manual


      Single 5"L x 14"H x 5"W
      Double 10"L x 14"H x 5"W
      Triple 15"L x 14"H x 5"W
      *Height is 10” (4” added for room to change cartridges)

      Operating Specs

      Connection Size 1/4"
      Min Operating Pressure 20 psi (pounds per sq. in.)
      Max Operating Pressure 60 psi (pounds per sq. in.)
      Min Operating Temperature 40° F
      Max Operating Temperature 90° F
      Max Flow Rate 0.5 gpm (gallons per minute)

      The current processing time for orders is 1 to 5 business days

      Free shipping on orders over $69.99 and $6.99 flat rate shipping for orders under $69.99  in Mainland 48 States only.  For all others please contact for shipping quote.

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