Abstract: A film processing fluid mixing and dispensing apparatus is disclosed having means for flushing residual chemicals from surfaces of the apparatus. The apparatus has a reservoir for mixing chemicals and a structure for delivering water under pressure to the reservoir. The apparatus also includes several bottles each containing film processing chemical components. The bottles each have a mouth which is sealed with a piercable septum. A stationary template is provided for stationarily engaging and supporting the inverted bottles so that fluid from them drains into the reservoir. Movable piercers are provided for piercing the septa. The piercers are tubular. An elongated nozzle is fitted into each piercer core for delivering water under pressure to the inside of the reservoir and to the piercer surfaces. The nozzles are equipped with defusers to deliver the water in a divergent spray. The nozzles are held stationary, while the piercers are mounted for relative longitudinal movement with respect to the nozzles.