The RR1 should be used in place of Formula 500 and Formula 2000 and is made for use with any hardness of well water with pH 6 or greater. With this 2.5-gallon container you will get 625,000 gallons of treated well water with 1 ppm iron.
Model: AA-H1976 Product Dimension. Length: 20 1/16 “; Outer Dimension: 7″; Top: 3″ Open; Bottom: 3″ Open. Specifications: Filtration Area: 80 Sq. 100% American Made and Sourced. Great Seal: We use soft plastisol end caps to allow for a better seal on top and bottom, this will reduce water bypass and ensure your filter works as effectively as possible. COMPATIBLE REPLACEMENT PART NUMBERS. All American Cartridge is an independent brand.