Akron Brass Akromatic 2000 [5178] 3 1/2" (89mm) Electric Master Stream Nozzle. Akron Brass’ Akromatic 2000 electric master stream nozzle is designed for flows from 500 to 2000 gpm (1900-7600 lpm) at an operating pressure of 80 psi (5.5 bar). This nozzle has a manual override and built-in stream shaper for ease of use. In addition, the Akromatic 2000 provides electric pattern control. To find out more about this master stream nozzle, contact an Akron Brass distributor today.