Pentek C Series Dual-Purpose Carbon-Impregnated Cellulose Filter Cartridges, 5 Micron, Multiple Sizes
| Model | Item # | Dimensions | Micron Rating | Pressure Drop @ Flow | Chlorine Capacity @ Flow | NSF/ANSI 42 Certified |
|---|---|---|---|---|---|---|
| C2 | 155022-43 | 2.5" x 4.88" | 5 | 2 psi @ 2 gpm | >2,500 gal @ 0.5 gpm | No |
| CS1 | 155528-43 | 2.25" x 9.75" | 5 | 4 psi @ 5 gpm | >3,000 gal @ 1 gpm | No |
| C1 | 155002-43 | 2.88" x 9.75" | 5 | 4 psi @ 5 gpm | >5,000 gal @ 1 gpm | Yes |
| C1-20 | 155597-43 | 2.5" x 20" | 5 | 1 psi @ 5 gpm | >10,000 gal @ 2 gpm | No |
| C1-20BB | 155651-43 | 4.5" x 20" (Big Blue) | 5 | 2 psi @ 4 gpm | >40,000 gal @ 4 gpm | No |
Media: PAC-impregnated cellulose
Endcaps: Vinyl plastisol
Netting: Polyethylene
Core: Polypropylene
Temp Rating: 40°F–125°F (4.4°C–51.7°C)
Certification: NSF/ANSI Standard 42 (C1 only — other variants not NSF certified)
Note: Recommended for chlorinated municipal water supplies; not for use with well/untreated water due to cellulose media's susceptibility to bacterial attack
The Pentek C Series offers an economical, dual-purpose solution for general-purpose water filtration. Constructed of carbon-impregnated cellulose media, these cartridges filter out fine sediment particles while reducing unwanted taste, odor, and chlorine taste and odor from tap water — all in a single, affordable cartridge. External netting and, on select sizes, a polyester reinforcement backing provide additional strength and dirt-holding capacity.
Available in three lengths and three diameters, C Series cartridges are nominally rated at 5 microns and deliver both chlorine and sediment reduction with high flow rates thanks to their low initial pressure drop. They're well suited to a wide range of residential applications on chlorinated water supplies, and also make excellent polishing filters in process or closed-loop streams.
The C1 model is tested and certified by NSF International to NSF/ANSI Standard 42 for material requirements. As with other cellulose-media cartridges, some harmless bacteria may attack the media over time — if a cartridge shows disintegration or a musty odor, switching to a synthetic media cartridge is recommended. Select the model below that matches your housing size.
