Tier1 5 Micron 20 x 4.5 Water Filter | Radial Flow Granular Activated Carbon Whole House Cartridge | Replacement for Pentek EP-20BB, 155583-43, CB-45-2005 | 4.5 x 20 Water Filter (3-Pack)

Q. What is this filter used for? A. This whole house carbon block water filter is designed to help reduce chlorine taste and odor while also capturing fine sediment such as rust, dirt, and silt before water reaches household plumbing and fixtures. Q. What does 5 micron filtration do best? A. A 5 micron rating provides enhanced sediment reduction by targeting smaller visible particulate matter while maintaining steady household water flow. It is commonly used when finer particulate control and chlorine reduction are desired in one cartridge. Q. How does carbon block filtration work? A. Carbon block filters use compressed activated carbon to reduce chlorine through adsorption while also acting as a mechanical barrier for sediment particles. The dense carbon structure allows finer particulate capture compared to higher micron options. Q. Where is this filter typically installed? A. The 10 x 2.5 inch cartridge size is commonly installed in slimline whole house housings at the main water entry point or as a dedicated carbon stage within multi-stage filtration systems. Q. Is this compatible with specific replacement models? A. Yes. This cartridge is compatible with Pentek EP-10, 42-34373, 155531-43, CB-25-1005, MAXETW-975, WHKF-WHWC, FXWTC and similar 10 x 2.5 inch housings that match the listed size specifications. Q. Is this suitable for municipal or well water? A. This filter is commonly used with treated municipal water where chlorine is present. In well water systems, a sediment pre-filter is often recommended upstream if sediment levels are elevated. Q. How do I know when to replace it? A. Replacement timing varies based on chlorine concentration, sediment conditions, and household usage. Many homeowners monitor changes in taste, odor, pressure, or water flow to determine when replacement is appropriate.

• COMPATIBLE REPLACEMENT MODELS – This 5 micron 10 x 2.5 carbon block cartridge is compatible with Pentair EP-10, 155531-43, CB-25-1005, MAXETW-975, Kenmore 42-34373, EP5-10, CEP-10E, 155714-43, WHKF-WHWC, FXWTC and similar 10” x 2.5” slimline whole house filter housings.
• 5 MICRON CARBON BLOCK FILTRATION – Designed to reduce chlorine taste and odor while capturing fine sediment, rust particles, dirt, and silt rated at 5 microns, supporting enhanced particulate control and consistent household water flow in treated municipal systems.
• CARBON BLOCK MEDIA DESIGN – Dense carbon block construction combines mechanical sediment filtration with adsorption technology, helping reduce chlorine while providing finer particulate reduction compared to higher micron carbon cartridges.
• IDEAL WHOLE HOUSE TREATMENT STAGE – Commonly installed at the main water entry point or as a dedicated carbon stage to help protect plumbing, fixtures, appliances, and downstream filtration equipment from chlorine exposure and fine sediment buildup.
• SERVICE LIFE VARIES BY WATER CONDITIONS – Replacement frequency depends on chlorine levels, sediment load, water quality, and household usage. Monitoring changes in taste, odor, pressure, or flow helps determine when cartridge replacement is needed to maintain system performance.