The pressure hose of the rinse aid pump of the commercial dishwasher. It is located between the machine's boiler and the pressure-activated rinse aid pump. The water supply pressure activates the rinse aid pump via this hose during the water intake phase of the machine. after the water intake is finished, the activated fabric softener pump pushes the fabric softener into the machine. Suitable for dishwashers in many restaurant kitchens and commercial kitchens. e.g. Electrolux Professional, Zanussi, Amica, Colged, Elettrobar, Eurowash, Fagor, Wolk.