Flushing your coolant, radiator, or heater core system doesn't have to be a difficult process thanks to the OEMTOOLS 24719 Coolant System Flush Gun. When the vents in your vehicle's cabin aren't outputting enough heat, turn to our heater core flush system for backflushing your systems. Remove rust, dirt, and other particles from the heater core, radiator, and coolant system with an effective pressurized blast from our radiator coolant flush gun. The universal nozzle of our cooling system flush kit gives you a tight fit in the hose of your radiator or heater core for maximized pressure with the radiator backflush kit. Our coolant system flush kit is simple and effective. Hook up a standard garden hose with the included coupler and utilize the lock-on latch for simple attachment of an air hose. Operate the heater core flush tool with a PSI of 20-40 to ensure the interior walls of your systems remain undamaged during cleaning. Be sure to allow water to fill the system for heater core or radiator flushing before sending pressure through the line, to ensure your system is receiving adequate pressure for cleaning with every pressurized blast from the radiator flush tool. You'll get excellent control and comfort from our heater core kit's lever-action air throttle for blasting air into the line. Flush your systems of the rust and particulate that accumulates in your heater core, radiator, and coolant systems with the simple and effective utility of the OEMTOOLS 24719 Coolant System Flush Gun.