Review on 💦 Thexton 356 Cooling System Backflush Tool: Efficient Solution for Flushing your Vehicle's Cooling System by Blake Mannasseh

I use this to backwash my cars heater core. It has a universal nozzle controlled by a ball valve. Simply pull off the heater hoses at the front of the engine, put a nozzle in the return hose and have it ripped off. The pulsing of the ball valve helps loosen dirt stuck to the tube walls in the core