The Corn King model #903 is designed as a “dry and wet” pipe principal of construction. The outer or dry pipe encloses and protects the inside parts while the inner or wet pipe protects water as it passes to the brass outlet nozzle. The Corn King model #903 comes standard with galvanized inside and outside pipe with all brass principle working parts, ¾” FIP Inlet and ¾” GHT outlet, self draining non-freezing drain. The Corn King model #903 is fully serviceable from above ground. Certified to NSF/ANSI 372.