no1special

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  1. antiquefirelt
    antiquefirelt liked a post in a topic by no1special in Backflow Preventer Use in the Fire Service   
    The FDNY uses them when conducting foam operations with the foam carriers or tender. The carrier or tender supplies concentrate to the FIMM (which controls the foam percenatge). The FIMM is built into the Sattelite engines, or a portable one can be connected to any engine. The engine being supplied with concentrate is hooked up to a hydrant, and must use a backflow preventer to prevent contamination of the water system.