Watts (FM-BB-20-1) 20"X4.5" Big Blue Pleated 1 Micron Sediment Filter
Watts FM-BB-20-1 Core Specs
Filter Specifications
| Model Number | FM-BB-20-1 (Filbur 20-41201) |
| Filter Size | 20 inch x 4.5 inch (Big Blue) |
| Micron Rating | 1 Micron (nominal) |
| Media Construction | Pleated polyester, cleanable and reusable |
| End Cap Material | Plastisol with color-coded micron reference |
| Surface Technology | No surface blinding design for sustained flow |
| Housing Compatibility | Standard 20" Big Blue filter housings |
Where This Filter Works
The Watts FM-BB-20-1 fits all standard 20 inch Big Blue filter housings and is designed for whole-house sediment filtration in municipal or well water systems. At 1 micron, this filter captures fine sand, silt, rust, and scale that can damage fixtures, appliances, and downstream filtration equipment. The pleated polyester media is cleanable and reusable, making it ideal for applications where sediment loads vary seasonally or where maintenance intervals need to be extended. Compatible with Watts, Pentek, and other major Big Blue housing brands. Use this filter as a primary sediment barrier or as a polishing stage ahead of carbon blocks, UV systems, or reverse osmosis units.
Watts FM-BB-20-1 Core Specs
Filter Specifications
| Model Number | FM-BB-20-1 (Filbur 20-41201) |
| Filter Size | 20 inch x 4.5 inch (Big Blue) |
| Micron Rating | 1 Micron (nominal) |
| Media Construction | Pleated polyester, cleanable and reusable |
| End Cap Material | Plastisol with color-coded micron reference |
| Surface Technology | No surface blinding design for sustained flow |
| Housing Compatibility | Standard 20" Big Blue filter housings |
Where This Filter Works
The Watts FM-BB-20-1 fits all standard 20 inch Big Blue filter housings and is designed for whole-house sediment filtration in municipal or well water systems. At 1 micron, this filter captures fine sand, silt, rust, and scale that can damage fixtures, appliances, and downstream filtration equipment. The pleated polyester media is cleanable and reusable, making it ideal for applications where sediment loads vary seasonally or where maintenance intervals need to be extended. Compatible with Watts, Pentek, and other major Big Blue housing brands. Use this filter as a primary sediment barrier or as a polishing stage ahead of carbon blocks, UV systems, or reverse osmosis units.
Description
Watts FM-BB-20-1 Core Specs
Filter Specifications
| Model Number | FM-BB-20-1 (Filbur 20-41201) |
| Filter Size | 20 inch x 4.5 inch (Big Blue) |
| Micron Rating | 1 Micron (nominal) |
| Media Construction | Pleated polyester, cleanable and reusable |
| End Cap Material | Plastisol with color-coded micron reference |
| Surface Technology | No surface blinding design for sustained flow |
| Housing Compatibility | Standard 20" Big Blue filter housings |
Where This Filter Works
The Watts FM-BB-20-1 fits all standard 20 inch Big Blue filter housings and is designed for whole-house sediment filtration in municipal or well water systems. At 1 micron, this filter captures fine sand, silt, rust, and scale that can damage fixtures, appliances, and downstream filtration equipment. The pleated polyester media is cleanable and reusable, making it ideal for applications where sediment loads vary seasonally or where maintenance intervals need to be extended. Compatible with Watts, Pentek, and other major Big Blue housing brands. Use this filter as a primary sediment barrier or as a polishing stage ahead of carbon blocks, UV systems, or reverse osmosis units.
