4.5" x 20" Carbon Block Replacement Water Filters (4 Pack)

Upgrade your water quality with this high-performance 4.5" x 20" Carbon Block CTO (Chlorine, Taste & Odor) Water Filter, engineered for powerful chemical reduction and improved water clarity. Designed to fit most standard Big Blue®-style housings, this large-capacity cartridge delivers reliable filtration for whole-house, commercial, and high-flow applications. Using advanced carbon block technology, this filter effectively reduces chlorine, unpleasant tastes, odors, and a wide range of organic contaminants—leaving your water cleaner, fresher, and better tasting for drinking, cooking, and everyday use.

• Effective Chlorine Reduction – Targets chlorine to improve water taste and eliminate chemical odors.
• CTO Filtration (Chlorine, Taste & Odor) – Enhances overall water quality for drinking, cooking, and bathing.
• Advanced Carbon Block Technology – Dense carbon structure provides thorough chemical absorption and consistent performance.
• Large 4.5" x 20" Capacity – Designed for whole-house and high-flow filtration systems.
• Improves Water Clarity – Reduces fine sediment and particulate matter.
• High Flow Rate Performance – Maintains strong water pressure while filtering effectively.
• Compatible with Big Blue® Housings – Fits most standard 4.5" x 20" filter housings.
• Protects Plumbing & Appliances – Helps reduce chlorine-related wear on fixtures, pipes, and water heaters.
• Ideal for Municipal Water Supplies – Perfect for homes using chlorinated city water.
• Durable & Long-Lasting Design – Built for dependable filtration and extended service life.