Tier1 10 Micron 20 x 4.5 Water Filter | Whole House Radial Flow Carbon Filter Cartridge | Granular Activated Pre-Filter | Replacement for Pentek EPM-20BB, 155783-43, EPM4-20BB | 4.5 x 20 Water Filter

Q. What is this filter used for? A. This whole house radial flow carbon block water filter is designed for homeowners who want to reduce chlorine taste and odor while capturing medium sediment before water reaches household plumbing, appliances, and downstream filtration systems. Q. Who is this filter best suited for? A. It is commonly used by families and DIY homeowners focused on whole-house water quality, especially in homes supplied by treated municipal or city water where chlorine and visible particulates may be present. Q. Where is this filter typically installed? A. This cartridge is installed at the point of entry on the main water line, commonly located in a basement, garage, or utility room, where incoming water is treated prior to distribution throughout the home. Q. How does radial flow carbon block filtration work? A. Radial flow carbon block media directs water from the outer surface toward the inner core, supporting consistent contact with the carbon structure to assist with chlorine reduction while allowing steady water flow. Q. Is this filter suitable for well water systems? A. This filter may be used on well water systems when sediment levels are managed with appropriate pre-filtration. In higher sediment conditions, a dedicated sediment pre-filter is recommended before carbon filtration. Q. Will this affect household water pressure? A. The radial flow design is engineered to support steady water flow when installed in a compatible housing and operated within normal residential demand. Q. How often should this filter be replaced? A. Replacement frequency depends on water quality, chlorine levels, and household usage. Monitoring changes in pressure, flow rate, or chlorine taste and odor helps determine when replacement is needed.

• COMPATIBLE REPLACEMENT MODELS – This 10 micron 20 x 2.5 radial flow carbon block filter is compatible with Pentair EPM-20, 155635-43, CB-25-2010, 15563543, Culligan EPM-20, Ametek EPM-20, KX MATRIKX-CTO 03-250-125-20, CFB-20, 255672-43 and fits most standard 20 inch x 2.5 inch whole house filter housings.
• RADIAL FLOW CARBON BLOCK DESIGN – The radial flow carbon block construction directs water from the outer surface toward the core, supporting consistent contact time for chlorine taste and odor reduction while maintaining steady residential flow.
• 10 MICRON SEDIMENT AND CHLORINE REDUCTION – Designed to capture medium sediment such as rust, silt, and visible particulate while also reducing chlorine taste and odor commonly present in treated municipal water supplies.
• SERVICE LIFE VARIES BY WATER CONDITIONS – Replacement frequency depends on sediment levels, chlorine concentration, and household water usage. Monitoring pressure or flow changes helps determine when cartridge replacement is needed.
• WHOLE HOUSE CARBON FILTRATION APPLICATION – Commonly installed at the main water entry point to support overall water clarity and reduce chlorine exposure throughout the home, while helping protect plumbing fixtures and downstream filtration equipment.