Simply remove radiator cap and drain the coolant. Remove heater hoses from the engine, placed the stepped adapter end of the THX356 Back Flush tool into the hose opposite of the one connected to the water pump. Connect the adapter to the shop water supply. Turn water supply on and open the valve to allow water to flow through the heater core. Once you see clear, clean water, you heater core is clean.

Product Features:

• Provides the technician with an easy way to flush the heater core
• 1/2", 5/8" and 3/4" inches hose size fittings
• Connects by using a normal garden hose
• Easy to use
• Made of non-corrosive aluminum