About This Includes a 3-stage whole house water filter system (iSpring WGB32B-DS) with sediment, polyphosphate anti-scale, and carbon block filters to remove sediment, chlorine, rust, herbicides, industrial solvents and more while protecting pipes and appliances from scale and corrosion. Also includes a reusable 1000 micron spin down sediment prefilter (iSpring WSP-1000) to trap sediment, rust, dirt and large particles as a first defense for the whole house system. DIY installation; whole house system has 1" NPT inlet/outlet compatible with the spin down prefilter's 1" MNPT and 3/4" FNPT threads. Whole house system filters water flow up to 15 GPM; spin down prefilter rated for maximum 20 GPM flow. Both the whole house system and spin down prefilter are for indoor use only, within suitable temperature (40-100°F) and pressure (15-115 PSI) ranges. Overview Brand : iSpring Special Feature : Chlorine Reduction, NSF certified Capacity : 100000 Gallons Package Information : Cartridge Installation Type : Under Sink Purification Method : Carbon Block, Sedimentation Power Source : Water Pressure Model Name : WSP 1000 Lower Temperature Rating : 40 Degrees Fahrenheit Maximum Flow Rate : 15 Gallons Per Minute