Product Specifications: Flow Rate : 1.5GPM @ 65psig Product Dimensions: 15.1″ X 7.25″ (12.25″ is needed for the hoses) X 2.52″ Capacity: WD-20M-REP - 1st stage cartridge - Capacity depends on Dirt, Sediments, Dust and Dusk levels in your water. WD-S-8K-REP - 2nd stage cartridge - 8,480 Gallons with normal sediments levels. Cartridge lifespan: 1 year under warranty. WQA-Certified WD-S-8K Cartridge (2nd stage of this system) is certified by WQA to NSF/ANSI 42 for Chlorine taste, odor and NSF/ANSI 372 for lead free compliance as verified and substantiated by test data. System includes: WD-20M-REP cartridge (First Stage, capacity depends on Dirt, Sediments, Dust and Dusk levels) and WD-S-8K-REP cartridge (2nd stage, Capacity: 8480 Gallons, WQA Gold Seal Certified), Head with dual built-in shut off valves, inlet hose - 3/8 female compression by 1/4 standard pipe thread, outlet hose- 3/8 m compression by 1/4 standard pipe.