Akron Brass AkroFoam [4471] 2 1/2'' (65 mm) Brass Master Stream Electric Nozzle with Pickup Tube. The AkroFoam nozzles are self-educting master stream nozzles designed for educting foam at flow rates up to 1000 gpm (4800 lpm). Contact a distributor today to learn more about this foam nozzle and eductor.