Heavy-Duty Water Filtration Housing for Clean Water Throughout Your Home Deliver reliable, high-capacity water filtration to your entire home with this 4.5” x 20” Big Blue Whole House Filter Housing. Designed for long-lasting durability and performance, this unit is ideal for residential and light commercial use—effectively reducing sediment, chlorine, rust, and other contaminants. Compatible with all standard 20” x 4.5” filter cartridges, this housing features a 1-inch NPT inlet and outlet for robust, corrosion-resistant connections. Built from reinforced polypropylene, the housing withstands high pressures and corrosive environments while maintaining water purity. All materials are food-grade, BPA-free, and lead-free, compliant with NSF standards for health and safety. Key Features: Fits all standard 20" x 4.5" Big Blue filter cartridges 1” NPT brass threaded ports for durable, leak-free connections Double O-ring seal prevents leaks and enhances long-term reliability Reinforced polypropylene construction resists corrosion and cracking Pressure relief button on cap allows safe, easy cartridge changes BPA-free & lead-free for safe, clean drinking water Includes: Steel mounting bracket, housing wrench, and installation screws Applications: Perfect for whole-home filtration setups, this housing is ideal for use with sediment, carbon block, or specialty cartridges to protect plumbing systems and appliances while improving overall water quality. Whether your concern is rust, chlorine, dirt, or taste and odor, this housing supports the filtration solution you choose. Why Choose This Model? With its robust build and included accessories, this Big Blue housing is a complete, easy-to-install system designed to meet the demands of large households or high-usage water systems. Its long service life, minimal maintenance needs, and strong sealing design make it the go-to choice for reliable, cost-effective water treatment.