
Watts-FPMB20 FlowPro Melt Blown Cartridge 20 Micron 40 in
Watts FPMB20 FlowPro Technical Details
| Model Number | Watts FPMB20 |
| Filter Type | Melt Blown Polypropylene |
| Dimensions | 40 in × 2.5 in diameter |
| Micron Rating | 20 micron |
| Temperature Rating | Up to 140°F (60°C) |
| Pressure Differential | 40 psid maximum |
| Certifications | NSF/ANSI 42 & 372 (WQA tested) |
| Applications | Whole house, RO pre-filtration, food grade |
Installing Your FlowPro Cartridge
- Shut off water supply and relieve system pressure before opening the filter housing
- Remove old cartridge and clean the housing sump with a mild detergent solution, then rinse thoroughly
- Insert the Watts FPMB20 cartridge into the housing, ensuring proper seating at both ends
- Reinstall the housing, turn water back on slowly, and check for leaks at all connections
- Flush the system for 3-5 minutes before use to remove any residual manufacturing fines
Compatible Systems & Applications
The Watts FPMB20 FlowPro is designed for Watts FlowMax and other compatible 40-inch filter housings with 2.5-inch diameter cartridge wells. This sediment filter works as a pre-filter for reverse osmosis systems, whole house water treatment, food and beverage processing, chemical filtration, electronics manufacturing, and metal finishing operations. The high dirt holding capacity and 100% polypropylene construction make it ideal for heavy sediment loads in municipal or well water applications where chemical resistance and zero media migration are critical.
Watts FPMB20 FlowPro Technical Details
| Model Number | Watts FPMB20 |
| Filter Type | Melt Blown Polypropylene |
| Dimensions | 40 in × 2.5 in diameter |
| Micron Rating | 20 micron |
| Temperature Rating | Up to 140°F (60°C) |
| Pressure Differential | 40 psid maximum |
| Certifications | NSF/ANSI 42 & 372 (WQA tested) |
| Applications | Whole house, RO pre-filtration, food grade |
Installing Your FlowPro Cartridge
- Shut off water supply and relieve system pressure before opening the filter housing
- Remove old cartridge and clean the housing sump with a mild detergent solution, then rinse thoroughly
- Insert the Watts FPMB20 cartridge into the housing, ensuring proper seating at both ends
- Reinstall the housing, turn water back on slowly, and check for leaks at all connections
- Flush the system for 3-5 minutes before use to remove any residual manufacturing fines
Compatible Systems & Applications
The Watts FPMB20 FlowPro is designed for Watts FlowMax and other compatible 40-inch filter housings with 2.5-inch diameter cartridge wells. This sediment filter works as a pre-filter for reverse osmosis systems, whole house water treatment, food and beverage processing, chemical filtration, electronics manufacturing, and metal finishing operations. The high dirt holding capacity and 100% polypropylene construction make it ideal for heavy sediment loads in municipal or well water applications where chemical resistance and zero media migration are critical.
Original: $15.08
-65%$15.08
$5.28Description
Watts FPMB20 FlowPro Technical Details
| Model Number | Watts FPMB20 |
| Filter Type | Melt Blown Polypropylene |
| Dimensions | 40 in × 2.5 in diameter |
| Micron Rating | 20 micron |
| Temperature Rating | Up to 140°F (60°C) |
| Pressure Differential | 40 psid maximum |
| Certifications | NSF/ANSI 42 & 372 (WQA tested) |
| Applications | Whole house, RO pre-filtration, food grade |
Installing Your FlowPro Cartridge
- Shut off water supply and relieve system pressure before opening the filter housing
- Remove old cartridge and clean the housing sump with a mild detergent solution, then rinse thoroughly
- Insert the Watts FPMB20 cartridge into the housing, ensuring proper seating at both ends
- Reinstall the housing, turn water back on slowly, and check for leaks at all connections
- Flush the system for 3-5 minutes before use to remove any residual manufacturing fines
Compatible Systems & Applications
The Watts FPMB20 FlowPro is designed for Watts FlowMax and other compatible 40-inch filter housings with 2.5-inch diameter cartridge wells. This sediment filter works as a pre-filter for reverse osmosis systems, whole house water treatment, food and beverage processing, chemical filtration, electronics manufacturing, and metal finishing operations. The high dirt holding capacity and 100% polypropylene construction make it ideal for heavy sediment loads in municipal or well water applications where chemical resistance and zero media migration are critical.















