The Enpress ONE Cartridge Tank is a 100% non-metallic filter housing that takes a single 8" × 40" ONE cartridge in place of a rack of small 2½" or 4½" housings or an expensive stainless-steel cartridge housing. This is the residential and light-commercial configuration, with 2.5" threaded top and bottom caps and the matching bottom drain and plumbing adapter. Enpress’s patented liner and snap-ring design means a cartridge change is press the relief valve, pull the ring, lift the cap — no tools, no wrench, no spilled housing bowl.
It takes every residential-series ONE cartridge on our store: carbon block, chloramine block, pleated, string-wound, NanoAl and refillable media. The commercial Red and Purple Series cartridges use the 4.5" commercial configuration, NFS-HF-PLUS.
Specifications
| Enpress ONE Cartridge Tank Filtration System, Residential / Light Commercial | |
|---|---|
| Rating | |
| Listing | NSF/ANSI 44 and 61 listed device |
| Pressure | Tested to 150 psi operating pressure with a 4:1 burst safety factor |
| Cartridge | One 8 in × 40 in Enpress ONE cartridge, any residential series |
| Configuration and connections | |
| Configuration | Residential / light-commercial: 2.5" threaded top and bottom caps (CT-2.5LID), 2.5" bottom drain and adapter (CT-2.5DRAIN / CT-2.5ADAPTER) |
| Plumbing connections | Full 1¼" and 2" connection options per Enpress; see the spec sheet for the adapter fitted |
| Top cap option | Cap with pressure-release valve and removal handles (CT-1/4NPTLID) |
| Size and shipping | |
| Height to floor | 39¾ in (1010 mm), per the Enpress spec sheet schematic |
| Shipping weight | 12.93 lb |
| Construction | |
| Body | 100% non-metallic; patented industry-exclusive liner; full radial seal top and bottom caps |
| Cartridge retention | No-tools snap ring with I.D. tag |
| Finish | Supplied in black (Enpress offers natural, blue, almond, grey and black) |
| Identification | |
| System | Enpress ONE Cartridge Tank®, residential / light-commercial configuration |
| Our SKU | NFS-HF |
| Companion | NFS-HF-PLUS (commercial 4.5" configuration); E1 integrated bypass, meter and drain connection system available separately |
| Manufacturer warranty | One year from date of purchase on ONE Cartridge Tank and 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. |
How it is built
- Composite tank body — 100% non-metallic, nothing to corrode, tested to 150 psi with a 4:1 burst margin.
- Patented liner and full-radial-seal caps — the seal that lets the top come off without tools and go back on without leaks.
- Snap ring with I.D. tag — press the red relief valve, pull the ring, lift the cap, swap the cartridge.
- 2.5" threaded caps and bottom drain/adapter — the residential / light-commercial fitting set.
Plumb a drain. Enpress recommends a drain on the inlet side for flushing sediment out of the tank, and one on the outlet side for flushing the carbon dust from a new Blue Series block.
Cartridge sold separately. Pick the series for the job from the ONE cartridges on our store.
Where it is used
Whole-house and point-of-entry filtration on city or well water; food service and light-commercial water where a bank of small housings has become a maintenance burden. One tank, one cartridge, one change a service interval.
Not sure which ONE cartridge or configuration suits your water and flow? Contact our engineers.
Sources: Enpress “ONE Cartridge Tank” spec sheet (01/2022) and Cartridge Tank product page; Enpress “ONE Limited Warranty” (2025-04). Height is from the Enpress schematic; shipping dimensions allow for packaging. 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 ratings are nominal unless stated absolute. Enpress, ONE, Cartridge Tank, Vortech and Agion are trademarks of their owners, used here to identify the product supplied. Confirm critical figures with ForeverPure before purchase.
