APPLICATION: Designed to work with a well pump system to maintain water pressure when the pump is not running; certified for safe, clean, drinking water NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372 approved BUILT TO LAST: Heavy-duty 20-gauge steel tank; 304 stainless steel water connection with patented leak safe technology; high performance variable geometry butyl rubber diaphragm; propylene liner SET-UP: Tank is pre-charged to 20 PSI for transportation; air pressure in the tank must be topped off with a bicycle pump to 2 PSI below the pressure switch cut-in setting STURDY BASE: Thermoplastic base lifts tank off of the floor preventing condensation from forming and staining of the floor SPECIFICATIONS: 20 gallon vertical tank; 7.2 gallon drawdown @ 30/50 PSI; handles 6 water fixtures running simultaneously; 1\" FNPT elbow system connection, NSF/ANSI tested/certified by WQA › See more product details