QUFYSK Coolant Flush Gun, Lever-Action Heater-Core & Radiator Flush Kit with 5 Adapters (19–40mm) and Air+Water Pulse

QUFYSK Coolant Flush Gun is a lever-action heater core and radiator flush kit that uses water plus compressed air to quickly clear rust, scale, and debris from automotive cooling and heater-core hoses.

This compact kit includes a trigger-operated flush gun, five universal coolant-vent adapters sized for 19–40 mm hoses, three hose adapters, an air line fitting, and PTFE sealant tape so you can connect garden hoses and shop air lines for a forceful, controlled flush. It’s designed to restore flow through heater cores and radiators by combining pressurized water with bursts of air to dislodge contaminants and move them out of the cooling circuit.

How does the QUFYSK flush gun remove buildup from heater cores?

The gun delivers alternating water flow and compressed-air pulses that agitate and push trapped rust, sediment, and scale out of narrow heater-core passages. The lever-action trigger controls flow intensity while a lock lets you run continuous flushing without hand fatigue.

• Air+water mixing creates strong, directional flushing force
• Multiple nozzle sizes match common coolant hose diameters
• Lever lock supports extended flushing sessions

Which vehicles and hose sizes are compatible with this kit?

QUFYSK supplies five vent adapters (19, 29, 32, 36.5, 40 mm) plus three hose fittings to fit standard garden and US-thread hoses. That covers most passenger cars, light trucks, and many older or imported models that use 1/2"–3/4" cooling hoses.

• Adapters for 0.7 in (19 mm) to 1.6 in (40 mm) coolant ports
• Fits 1/2", 5/8" and 3/4" garden hose threads and 1/4" shop air
• PTFE tape included for leak-free connections

What do I need to set up and operate the flush gun?

Set up requires a garden hose, a compressed-air source with a 1/4" line, and basic hand tools to access heater-core hoses. Connections are straightforward: attach water and air, select the matching adapter, seal with PTFE tape, then insert the nozzle into the coolant line and trigger the flush.

• Nozzle inserts into heater or radiator hose for direct flushing
• Adjustable trigger and lock for precise control and hands-free operation
• Includes air fitting and seal tape to reduce leaks during use

How long does a typical flush take and what results should I expect?

A basic flush usually takes 10–30 minutes depending on contamination level and system access. Expect clearer discharge water and improved flow through heater cores or radiators; repeat as needed until runoff appears clean. Always follow vehicle manufacturer guidance for coolant disposal and system refills.

• Quick initial flush in about 10 minutes for light deposits
• Longer sessions for heavy corrosion or buildup
• Safe, controlled flushing helps avoid pushing debris into other components

Who is this for: The QUFYSK Coolant Flush Gun Kit is aimed at DIY mechanics, professional technicians, and fleet maintenance crews who need a compact, versatile tool to clear heater cores, radiators, and coolant hoses. It suits anyone with access to a garden hose and shop air who wants a faster, more effective flush than gravity-only methods — while keeping connections sealed and hands comfortable during extended work.