Port-O-Flush Jr.™ is the smallest flushing unit available on the market today. A powerful tool packaged into a five-gallon bucket, Port-O-Flush Jr.™ provides portability and versatility while still efficiently handling small to medium size engines, heat exchangers, air conditioning & refrigeration systems. Use Port-O-Flush Jr.™ to cure: Engine overheat Clogged pipes Poor heat transfer on air conditioning & refrigeration systems Small parts cleaning Recommended Application Range and Uses: Flushing projects ranging from 1-20 Gallons Engines Up to 750 HP Small Air Conditioning & Refrigeration systems Small heat exchangers Piping up to 1.5" ID