The Enpress ONE CT-03-CB-AMINE is the chloramine-reduction block from the Blue Filtration Series, made for the Enpress ONE Cartridge Tank. Where a standard carbon block struggles with chloramine — the chlorine-plus-ammonia disinfectant many municipal supplies now use instead of free chlorine — this block uses a proprietary catalytic media with a very large number of catalytically active nitrogen groups, which Enpress rates at five times the chloramine capacity of a standard carbon block. It also reduces chlorine, bad taste and odour, in the same 8" × 40" format that replaces a rack of 2½" or 4½" housings.
Fits our NFS-HF Cartridge Tank Filtration System and NFS-HF-PLUS Commercial Cartridge Tank System. On a supply that uses free chlorine rather than chloramine, the CT-03-CB gives five times the rated capacity at twice the flow, so check with your water utility which disinfectant you have before choosing.
Specifications
| Enpress ONE CT-03-CB-AMINE — Blue Filtration Series | |
|---|---|
| Filtration performance | |
| Nominal micron rating | 3 micron (85% or greater removal of the rated particle size) |
| Rated capacity | More than 50,000 gallons (189,271 litres), estimated |
| Rated flow | 7 gpm (26.50 L/min) |
| Chloramine reduction | Greater than 85% at the rated flow, estimated capacity basis |
| Chloramine capacity vs a standard block | Five times, per Enpress |
| Reduces | Chloramine, chlorine, bad taste and odour from potable water |
| Size and shipping | |
| Cartridge size | 8 in diameter × 40 in long |
| Shipping weight | 13.05 lb |
| Construction | |
| Media | Proprietary catalytic carbon block with catalytically active nitrogen groups, on coconut-shell carbon; NSF/ANSI 61 certified carbon |
| Binder | Proprietary binder system |
| Outer wrap | Polypropylene wrap with polyethylene netting |
| Top cap | Handle-style cap for lightweight removal; pressure-release-valve option |
| Bottom connection | Double o-ring seal into the Cartridge Tank plumbing adapter |
| Materials | FDA-approved materials; California Proposition 65 compliant |
| Supplied with | Disposal bag |
| Housing it fits | |
| System | Enpress ONE Cartridge Tank — NFS-HF and NFS-HF-PLUS |
| Housing rating | NSF/ANSI 44 listed; tested to 150 psi operating pressure with a 4:1 burst safety factor (per the Cartridge Tank spec sheet) |
| Identification | |
| Manufacturer model | CT-03-CB-AMINE (Enpress LLC) |
| Our SKU | NFS-03-CB-HF-MINE |
| Series | Blue Filtration Series — contaminant reduction (sister models: CT-03-CB 3 micron high capacity, CT-20-CB 20 micron) |
| Manufacturer warranty | One year from date of purchase on ONE filter solutions, to the original purchaser, under the Enpress ONE Limited Warranty (2025-04). Normal wear items and damage from oxidising agents are excluded; see the document. |
Why chloramine needs a different block
- Chloramine does not strip out on plain carbon the way free chlorine does. It needs catalytic surface chemistry to break the chlorine-ammonia bond, which is what the nitrogen-group media in this block provides.
- The trade-off is throughput. The catalytic reaction needs contact time, so this block is rated at 7 gpm and 50,000+ gallons, against 15 gpm and 250,000+ gallons for the chlorine-only CT-03-CB. Size the flow accordingly, or run tanks in parallel.
- Same body, same fit. Coconut-shell carbon, proprietary binder, polypropylene wrap, handle top cap and double o-ring base — it drops into the Cartridge Tank exactly as the other Blue Series blocks do, no tools.
Flush a new block before use. New carbon blocks carry fine carbon dust; run water to drain until it runs clear before putting the system into service. Enpress recommends a drain on the outlet side of the Cartridge Tank for exactly this.
Not a disinfection device. Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.
Where it is used
Point-of-entry treatment on chloraminated municipal water where taste, odour and chloramine itself are the complaint; food service and beverage water; commercial and industrial make-up water; and as a polishing or pre-filter ahead of equipment or membranes that chloramine would damage. Check with your utility: if it disinfects with free chlorine only, the standard CT-03-CB is the better-value choice.
Not sure whether your supply is chlorinated or chloraminated, or which block to run? Contact our engineers.
Sources: Enpress “Blue Filtration Series” product literature (ELLC #002, 03/2013) for rating, capacity, flow, the chloramine-capacity comparison, construction and certifications; Enpress “ONE Cartridge Tank” spec sheet for the housing rating and flushing recommendation; Enpress “ONE Limited Warranty” (2025-04) for warranty terms. Performance claims are Enpress’s, based on independent lab results and manufacturer test data; actual performance depends on influent water quality, flow rate, system design and application. Micron rating is nominal. Enpress, ONE and Cartridge Tank are trademarks of Enpress LLC, used here to identify the product supplied. Confirm critical figures with ForeverPure before purchase.
