OEMTOOLS 24506 Cooling System Backflush Tool – Heater Core & Radiator Flush Valve, Brass Adapter Fits 1/2", 5/8", 3/4" Heater Hoses

OEMTOOLS 24506 Cooling System Backflush Tool – Heater Core & Radiator Flush Valve, Brass Adapter Fits 1/2", 5/8", 3/4" Heater Hoses

• Flush Fast: Quickly clears rust, sludge, and debris from heater cores and cooling systems.
• Full Control: Built-in brass shut-off valve lets you adjust flow rate precisely.
• Universal Fit: Connects to ½”, ⅝”, and ¾” heater hoses — fits most vehicles.
• Built to Last: Non-corrosive brass and aluminum construction for long-term reliability.
• Shop-Ready: OEMTOOLS design trusted by pros for fast, mess-free coolant system maintenance.

Provides the technician with an easy way to flush the heater core. 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.