Harmsco
Harmsco (HB-20-1W) 20"X4.5" Big Blue "Calypso Blue" Pleated Sediment 1 Micron Filter
$100.15
The Harmsco HB-20-1W delivers professional-grade sediment filtration with pleated polyester media engineered for high dirt-holding capacity and extended service life. This 20"x4.5" Calypso Blue cartridge captures particles down to 1 micron and can be cleaned and reused in most residential and commercial applications.
SPECIFICATIONS
Harmsco HB-20-1W Technical Details
| Model Number | HB-20-1W |
| Dimensions | 20" x 4.5" (Big Blue) |
| Micron Rating | 1 Micron |
| Filter Media | Pleated Polyester |
| Filter Type | Sediment (Reusable) |
| Housing Compatibility | Standard 20" Big Blue Housings |
| Application | Whole House, RO Pre-filtration |
| Color | Calypso Blue |
INSTALLATION & USE
Installing Your Harmsco Filter
- Turn off water supply and relieve pressure by opening a downstream faucet
- Unscrew Big Blue housing using a filter wrench and remove old cartridge
- Insert Harmsco HB-20-1W cartridge into housing, ensuring proper seating on center post
- Check o-ring for damage, lubricate if needed, and hand-tighten housing back onto cap
- Turn water supply on slowly and inspect for leaks before returning to full service
COMPATIBILITY
Where This Filter Works
The Harmsco HB-20-1W fits all standard 20 inch Big Blue filter housings with 4.5 inch diameter capacity. Ideal for whole house sediment filtration or as pre-filtration for reverse osmosis systems. The 1 micron rating makes it effective for removing fine sediment, silt, rust, and suspended particles while the reusable pleated design extends service intervals between replacements. Compatible with municipal and well water applications where mechanical sediment removal is required.
🔧 Pro Tip: Rinse the Harmsco HB-20-1W pleated cartridge every 2-3 months under high pressure water to restore flow rate. Most users get 6-12 months of service before needing replacement, depending on sediment load.
