NRC 10" Standard Nitrate Removal Water Filter Cartridge

Reduce nitrates, nitrites and sulphates from drinking water with the NRC 10" Standard Nitrate Removal Water Filter Cartridge, designed for potable water treatment and reverse osmosis polishing applications.

The NRC contains FDA-grade high-capacity anion exchange resin specifically selected for nitrate treatment. It can be used with tap water or as a post-RO polishing cartridge, where it provides an additional treatment stage for nitrates that may remain after the RO membrane.

The cartridge is 9¾" long and designed to fit compatible standard 10" water filter housings. It operates at 0.5–0.75 gpm and combines high treatment capacity with low pressure drop.

Third-party testing demonstrated 99% nitrate removal from a 71 ppm (as CaCO₃) spiked stream for 200 gallons under the tested conditions.

NRC Nitrate Removal Cartridge

The NRC uses high-capacity anion exchange resin to remove negatively charged ions from water, including:

• Nitrates
• Nitrites
• Sulphates

The cartridge is constructed entirely from FDA-grade materials and media.

It also incorporates a 100 micron reticulated poly foam pre-filter and a 20 micron spun-bonded polypropylene post-filter.

Unlike disposable treatment media that must always be discarded once exhausted, the NRC resin can be regenerated using sodium chloride brine.

Why Choose This Water Filter Cartridge?

• Nitrate-specific treatment — high-capacity anion exchange resin designed for nitrate removal.
• Nitrate, nitrite and sulphate removal — treats all three from tap or RO product water.
• Third-party tested — demonstrated 99% nitrate removal under the specified test conditions.
• Ideal RO polishing stage — particularly useful where additional nitrate treatment is required after reverse osmosis.
• FDA-grade construction — cartridge, materials and treatment media are FDA grade.
• High-capacity anion exchange resin — approximately 7,500 ppm treatment capacity.
• Regenerable media — can be regenerated using sodium chloride brine.
• Low pressure drop — designed to provide treatment without excessive flow restriction.
• 0.5–0.75 gpm flow rate.
• 100 micron pre-filter — reticulated poly foam provides initial particulate filtration.
• 20 micron post-filter — spun-bonded polypropylene provides the final filtration stage.
• Standard 10" format — fits compatible standard 10" housings.

How It Works

The NRC uses anion exchange resin rather than conventional sediment or activated carbon media.

Water first passes through the 100 micron reticulated poly foam pre-filter before entering the high-capacity anion exchange resin.

The resin removes nitrate, nitrite and sulphate ions from the water through the ion-exchange process.

Water then passes through the 20 micron spun-bonded polypropylene post-filter before leaving the cartridge.

The treatment path can be represented as:

100 Micron Pre-Filter → High-Capacity Anion Exchange Resin → 20 Micron Post-Filter

Nitrate Removal

The NRC is specifically designed for high nitrate removal from potable water.

Third-party testing demonstrated:

99% removal of influent nitrates from a 71 ppm (as CaCO₃) spiked stream for 200 gallons.

This performance figure relates specifically to the conditions under which the cartridge was tested.

Actual cartridge capacity will depend on the concentration of nitrates and competing sulphates in the incoming water.

Nitrate, Nitrite & Sulphate Treatment

The NRC can remove nitrates, nitrites and sulphates from tap water or reverse osmosis product water.

The supplied technical information gives an approximate treatment capacity of:

7,500 ppm

Because both nitrate and sulphate consume the resin's treatment capacity, the concentration of both should be considered when estimating cartridge life.

This makes incoming water chemistry particularly important when sizing or maintaining an NRC treatment system.

How to Estimate Cartridge Capacity

The NRC's approximate treatment capacity can be calculated using the total concentration of nitrates plus sulphates, expressed as CaCO₃.

Use:

7,500 ÷ Total ppm of Nitrates + Sulphates (as CaCO₃) = Approximate Gallons Treated

For example, if the combined nitrate and sulphate concentration to be removed were 50 ppm as CaCO₃:

7,500 ÷ 50 = approximately 150 gallons

This calculation estimates the volume that can be treated with complete nitrate/sulphate removal based on the supplied capacity formula.

Actual performance will depend on incoming water conditions and operation.

Ideal as an RO Polishing Cartridge

The NRC is particularly useful as a reverse osmosis polishing cartridge.

The supplied technical information notes that membrane rejection of nitrates can be limited, making an additional nitrate-specific ion exchange stage useful after the RO membrane.

A typical configuration can therefore use:

Reverse Osmosis Membrane → NRC Nitrate Removal Cartridge → Treated Water

The NRC can also be used directly on suitable tap-water applications, particularly where sulphate levels are low.

Best Suited For

The NRC 10" Standard Nitrate Removal Water Filter Cartridge is well suited to:

• Nitrate reduction
• Nitrite reduction
• Sulphate reduction
• Drinking-water filtration
• Potable water treatment
• Reverse osmosis polishing
• Post-RO nitrate treatment
• Tap-water nitrate treatment
• Water supplies containing low sulphate concentrations
• Dedicated drinking-water filtration systems
• Standard 10" filter housings

Key Specifications

*Third-party tested under the stated conditions.

Anion Exchange vs Carbon Filtration

The NRC performs a different function from conventional activated carbon filtration.

Activated carbon is commonly used for treatment such as chlorine, taste and odour.

The NRC uses nitrate-specific anion exchange resin to remove nitrate, nitrite and sulphate ions from water.

For water where nitrate treatment is the objective, the nitrate-specific ion exchange stage performs the targeted treatment rather than relying on a conventional carbon cartridge.

Flow Rate

The specified operating flow rate for the NRC is:

0.5–0.75 gpm

The cartridge is designed to provide nitrate treatment with low pressure drop.

Operating conditions and incoming water chemistry will influence treatment performance and service capacity.

Regeneration

The NRC uses brine-regenerable anion exchange resin.

The media can be regenerated using sodium chloride brine, restoring ion-exchange capacity for further use.

Regeneration should be performed using an appropriate process for the cartridge and treatment application.

Installation

The NRC is 9¾" long and designed to fit compatible standard 10" water filter housings.

It can be incorporated into a dedicated drinking-water system or used as an RO polishing stage.

To install or replace the cartridge:

1. Turn off the incoming water supply.
2. Release pressure from the filter housing.
3. Remove the filter housing sump.
4. Remove the existing cartridge.
5. Clean the housing if required.
6. Check that the housing O-ring is clean and correctly seated.
7. Install the NRC cartridge.
8. Reassemble the housing.
9. Slowly restore water pressure.
10. Check carefully for leaks.
11. Flush the system appropriately before normal use.

Maintenance

NRC service life depends primarily on the concentration of nitrates and sulphates in the incoming water and the volume of water being treated.

The supplied capacity calculation is:

7,500 ÷ Total ppm Nitrates + Sulphates (as CaCO₃) = Approximate Gallons Treated

Because nitrate levels cannot reliably be assessed by taste, smell or appearance, water testing should be used to determine treatment requirements and confirm ongoing performance where nitrate concentration is important.

The resin can also be regenerated with sodium chloride brine when appropriate.

What's Included

1 × NRC 10" Standard Nitrate Removal Water Filter Cartridge

Media: FDA-grade high-capacity anion exchange resin
Size: 9¾" / Standard 10" format
Flow Rate: 0.5–0.75 gpm

Frequently Asked Questions

What does the NRC cartridge remove?

The NRC is designed to remove nitrates, nitrites and sulphates from tap water or reverse osmosis product water.

How does it remove nitrate?

The cartridge contains high-capacity anion exchange resin.

The resin uses ion exchange to remove nitrate and other targeted anions from the water as it passes through the cartridge.

How effective is it at reducing nitrate?

Third-party testing demonstrated 99% removal of influent nitrates from a 71 ppm (as CaCO₃) spiked stream for 200 gallons.

That result applies to the specified test conditions.

What is the cartridge capacity?

The supplied technical information gives a treatment capacity of approximately 7,500 ppm.

Actual water volume treated depends on the combined concentration of nitrates and sulphates in the incoming water.

How do I calculate how many gallons it will treat?

Use:

7,500 ÷ Total ppm of Nitrates + Sulphates (as CaCO₃)

The result gives the approximate number of gallons that can be treated with complete nitrate/sulphate removal according to the supplied capacity formula.

Why does sulphate affect nitrate capacity?

The NRC resin removes both nitrate and sulphate.

This means sulphate competes for the cartridge's available ion-exchange capacity, so higher sulphate levels reduce the amount of capacity available for nitrate treatment.

Can I use it after a reverse osmosis system?

Yes. The NRC is particularly useful as an RO polishing cartridge.

The supplied technical information specifically identifies this as an application because nitrate rejection by RO membranes can be limited.

Can it be used directly on tap water?

Yes. The NRC is designed for treatment of tap water or RO product water, and is particularly useful in waters containing low sulphate levels.

What flow rate should I use?

The specified flow rate is 0.5–0.75 gpm.

What pH range is suitable?

The specified pH range is 5–9.

Is the cartridge regenerable?

Yes. The NRC's anion exchange resin can be regenerated using sodium chloride brine.

Is it made from drinking-water-grade materials?

The supplied specifications state that the cartridge is constructed entirely from FDA-grade materials and media.

Does the cartridge include pre- and post-filtration?

Yes.

It incorporates a 100 micron reticulated poly foam pre-filter and a 20 micron spun-bonded polypropylene post-filter around the ion exchange treatment media.

Will it fit my standard 10" housing?

The NRC is 9¾" long and designed to fit compatible standard 10" water filter housings.

How do I know when nitrate treatment is exhausted?

Nitrate cannot reliably be monitored through taste, smell or appearance.

Treatment capacity can be estimated from the incoming nitrate and sulphate concentrations using the supplied capacity formula, while water testing provides the appropriate way to verify nitrate concentration and treatment performance.