We recommend Crystal Quest CQ-RC-PL-20x5-ULTRA High-Flow Water Filter Replacement Cartridge 20"x5" - ULTRA. Heavy duty 20"x5" water filter cartridge for high-flow applications. Big Blue cartridge that is great for whole house water filters, apartments, or office water filtration needs. Filter features 5-stage filtration: one-micron filter pad, KDF55, KDF85, Ceramic Balls, Granular Activated Carbon (GAC), and another one-micron pad. Unique 20" long and 5" wide filter design will not affect water flow in higher-capacity applications. Removes hundreds of contaminants from water. Available in three models, PLUS, ULTRA and ULTIMATE with different filter life. Typical usage: for whole house filtration systems, filter fits into a standard 20x4.5 ( 20x5 ) inches water filter housing. Multi-Media Water Filter Cartridge Specifications: * Operating Water Temperature 40 F (5 C) - 100 F (38 C) * Operating Water Pressure 20 - 125 PSI Filter Life: * PLUS 160,000 gallons * ULTRA 240,000 gallons * ULTIMATE 320,000 gallons Filters 240,000 gallons.

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