Tier1 10 Micron 20 x 4.5 Water Filter | Whole House Radial Flow Carbon Cartridge | Granular Activated Pre-Filter | Replacement for Pentek EPM-20BB, 155783-43, EPM4-20BB | 4.5 x 20 Water Filter (3pk)

Q. What is this filter designed to reduce? A. This 10 micron whole house carbon block water filter is designed to reduce chlorine taste and odor while also capturing visible sediment such as sand, rust flakes, dirt, and larger silt particles before water reaches plumbing and fixtures. Q. How does radial flow carbon block filtration work? A. Water flows from the outer surface inward through the carbon media, allowing the block to reduce chlorine taste and odor through adsorption while capturing sediment particles rated at 10 microns. Q. What does 10 micron filtration do best? A. A 10 micron rating targets visible particulate matter while maintaining strong household water flow. It is commonly used where balanced sediment control and chlorine reduction are desired in one cartridge. Q. Is this compatible with my system? A. This cartridge replaces models including Pentair EPM-BB, 155782-43, CB-45-1010, EPM10-934 and fits most 10 inch x 4.5 inch large-diameter whole house filter housings that accept compatible 4.5 inch by 10 inch cartridges. Q. Where is it typically installed? A. It is commonly installed at the point-of-entry main water line in basements, garages, or utility rooms as a whole house treatment stage in large-diameter filtration systems. Q. Is this suitable for well water? A. This filter is commonly used with treated municipal water where chlorine reduction is desired. In well water systems with elevated sediment levels, a dedicated sediment pre-filter may be recommended upstream before carbon filtration. Q. Will this affect water pressure? A. When properly matched to system flow requirements, 10 micron carbon block filtration is designed to balance sediment reduction with steady household water flow. Q. How do I know when to replace it? A. Replacement timing depends on chlorine levels, sediment load, and household usage. Changes in taste, odor, pressure, or flow can indicate the cartridge should be replaced.