~Install 4 stage Reverse Osmosis System with a 3.2 gallon storage tank and 50 GPD (gallon per day) membrane. ~Warranty - Components are warranted for one year from installation, excluding membrane, pre & post filters ~Our workmanship is warrantied for 90 days ~Pre and Post Filters - Recommended change every six months for regular usage, or once a year in light usage. ~ RO Membrane - Change recommended based on periodic TDS rejection tests. Typical is every two years. ~Manufacturer recommends replacing the sump housings every 2-5 years depending on water usage and water chemistry.