The AP117 is sold as a 2-pack and is ideal for a whole-house water filtration system for use with Aqua-Pure AP100 series housings as well as the standard and large diameter stainless steel housings. The Aqua-Pure™ AP117 is a granular activated carbon filter that removes dirt, rust, sediment, and chlorine taste and odor. Product Benefits Patent pending technology provides fine sediment filtration down to 5 micron Rigid construction helps to eliminate sediment “unloading” due to variances in water pressure Double open ended design allows for filtration regardless of which way it is installed in housing The unique flow design of this cartridge allows for the use of finer, more effective granular activated carbon which yields a very low pressure drop. Neoprene gaskets on both top and bottom help provide sealing in any housing, helping to prevent bypass of unfiltered water down-stream