A back flow preventer device that produces an air gap that prevents the backflow of hazardous chemicals into a potable water system, being a component part of eductors

exterior residential and commercial thermal and moisture management building products, namely, non-metallic underlayments and wraps in the nature of spacer sheets for conducting water and vapor between juxtaposed surfaces in a roof or wall of a building

fluid handling equipment, namely proportioners and eductors with back flow preventors