A tank, a live hose reel and/or crosslay, a portable fire pump and/or a compressed air foam system (CAFS), with an engine: these can be combined into a single one-piece assembly that can be slipped onto a truck bed, trailer or into a body and used for flowing water and or foam on a structural fire, car fire or wildfire. The most common wildland and urban interface fire engines in North America combine a small truck with a water tank and a high performance portable pump.
