
Harmsco (HB-20-1W) 20"X4.5" Big Blue "Calypso Blue" Pleated Sediment 1 Micron Filter
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 |
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
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.
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 |
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
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.
Description
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 |
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
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.
















