KleenWater filter set of 2 compatible with Pentek EP-20BB and FLOPLUS-20BB 4.5 x 20 inch, provides "bottled quality" water for the entire home Compatible with KX Industries USA 32-425-125-20, Home Master CFRFGAC20-20BB, Watts PWCB20BBS, Pentek EP-20BB & FLOPLUS-20BB, DB20P, CTO20BB, 155312-43, CBC-20BB KleenWater brand KW4520CB 4.5 x 20 inch whole house solid activated carbon block water filter cartridges with two KleenWater drink holders. The 4.5 X 20 inch dimension supports flow rates of up to 6 gallons per minute. Thus the cartridge is acceptable for "point of entry" whole house applications. The KW4520CB carbon block cartridge is wrapped in a 5 micron polypropylene sheathing which traps dirt, sediment and rust. The extruded carbon block design will ensure that this cartridge will perform optimally for 40,000 gallons or 6-8 months (for a family of 4) before being exhausted under normal water conditions. Specification/Features: Double open ended cartridge configuration with the industry standard 4.5 inch x 20 inch dimension. Change cartridge every 6-8 months or upon substantial pressure reduction. Radial flow (vs axial flow) provides extended useful life and impressive flow rates