The HydroGuard HDGT-45 series is a compact under-sink reverse osmosis water purification system. It can filter up to 50 gallons of water per day, has a designer lead-free faucet, includes a SHOCK BLOK filter protection valve and, FLOWLOK leak detector water shutoff valve. It is easy to install and requires no tools for filter changes. 15″ (H) x 14.6" (W) x 4.6" (D) Flow Rate: Up to 50 Gallons Per Day Application: Point-of-Use Includes Chrome Non-Air Gap Faucet 4.5 Gallon Storage Tank 3-year limited warranty Stage 1: Sediment FiltrationRemoves dirt, sand, rust, and other physical particles. Stage 2: Carbon FilterRemoves the chlorine, chloramines, foul tastes, odors, and chemicals. Stage 3: Reverse Osmosis MembraneRemoves up to 99% of the total dissolved solids and contaminants. Stage 4: Post Carbon FilterRemoves dissolved gases, tastes, and odors from the holding tank water. It is recommended to replace the Hydro Guard RO Filters every 12 months.