• Thexton's Heater Core Back Flush Tool with Air Assist fit 1/2", 5/8", and 3/4" heater hoses and uses standard garden hose for water and 1/8 NPT for shop air fitting.
• Basic garden hose hook-up cleans cooling system & heater cores without disassembly.
• No need to use acids or caustic solutions. Radiator pressure cap prevents over boosting.
• Water pressure can be easily controlled with ergonomic handle.
• Now Included: 1/4" coupling size with 1/8" NPT
(California Prop 65)