Air Operated Wash Pump 1.for heavy duty cleaning with detergents, caustics, ... dilute acid type cleaners. 2.Material:S.S.316 Air Operated Wash Pumps Designed for heavy duty cleaning with detergents, caustics ... the pumping section are manufactured from 316 stainless steel. Code590881TypeAir operated wash pumpRatio10:1Air inlet1/2-14NPTF-1(F)Air Exhaust1 ...