Pneumatic 4/1 quick-connect. The 180° swivel joint directs the jet at any angle under full pressure. Also works as an RV water heater flush wand for both tilt-head and tank-style systems. Dual Water & Air Radiator Cleaning Wand — Deep Flush + Engine Air Filter Dusting in One Tool This radiator cleaning wand switches between water and air modes instantly — no tool swap required.