The Harmsco 801-1-20 delivers 1 micron pleated polyester filtration in a 20"x2.5" cartridge engineered for whole-house and well water sediment removal. NSF 61 certified with thermally bonded construction, this filter offers up to 50% more surface area than standard cartridges for longer runs and lower pressure drop.
SPECIFICATIONS
Harmsco 801 Series Filter Details
| Model Number | Harmsco 801-1-20 |
| Dimensions | 20" x 2.5" |
| Micron Rating | 1 micron |
| Media Type | Pleated Polyester |
| Construction | Thermally bonded |
| Certifications | NSF 61, FDA approved materials |
| Applications | Whole-house, well water, sediment filtration |
| Housing Compatibility | Standard 20" filter housings |
INSTALLATION & USE
Cartridge Replacement Process
- Shut off water supply and relieve pressure by opening a downstream faucet or using the housing pressure release button
- Unscrew the housing sump, remove the old 801-1-20 cartridge, and clean the housing interior with water
- Insert the new Harmsco 801 Series cartridge, lubricate the o-ring with silicone grease, and hand-tighten the sump until seated
- Turn water supply back on slowly, check for leaks, and run water for 2-3 minutes to flush the new filter media
COMPATIBILITY
Housing & System Fit
The Harmsco 801-1-20 fits all standard 20-inch filter housings with 2.5-inch inner diameter designed for full-size cartridges. Compatible with Watts, Pentek, Culligan, and other major housing brands rated for whole-house flow rates. The pleated design works in both vertical and horizontal mounting configurations. This 1 micron rating is ideal for well water sediment, rust, and fine particulate removal as a pre-filter or standalone sediment stage.
🔧 Pro Tip: The Harmsco 801 Series is reusable. Rinse the pleated media with a garden hose or low-pressure spray every 3-6 months to extend cartridge life and maintain flow rates, especially in high-sediment well water applications.
