LURKA Coolant System Flush Gun - Lever-Action Radiator & Heater Core Flusher with 5 Nozzles, 3/4" & 1/2" Hose Adapters

The LURKA Coolant System Flush Gun is a lever-action air-and-water radiato­r flusher kit that backflashes heater cores and cooling systems quickly using interchangeable nozzles and garden-hose adapters.

Built for both professional shops and at-home mechanics, this complete kit includes the flush gun, 3/4" and 1/2" garden hose quick-connect adapters, a 3/4" shut-off valve, and five rubber nozzles sized for 19–40mm hose inner diameters. Corrosion-resistant components, an ergonomic trigger with a locking latch, and an air-plus-water feed make it simple to clear rust, scale, and debris without buying extra fittings. The quick-connect fittings and multiple nozzle sizes mean you can adapt to most vehicle cooling lines and garden-hose supplies in minutes.

How does the LURKA flush gun improve heater core and radiator cleaning?

The unit pairs compressed air with a water stream to create a forceful backflush capable of dislodging accumulated deposits. That combined action reaches deep into narrow passages where hand-pumping or plain garden-hose pressure often fails. The lever trigger adjusts flow instantly, and the lock keeps the stream continuous during longer cycles.

• Dual air-and-water flow for stronger backflushing action
• Five nozzle sizes (19, 29, 32, 36.5, 40 mm) for tight hose fits
• Locking trigger prevents hand fatigue during extended flushing
• Corrosion-resistant materials for chemical and coolant exposure

What adapters and hose sizes are included, and how do they connect?

The kit ships with 3/4" and 1/2" garden hose quick-connect fittings plus a 3/4" female shut-off valve so you can control flow at the source. Quick-connect couplers create a secure, low-leak seal to standard garden hoses and workshop air lines. Swap nozzles to match the inner diameter of the cooling hose you’re servicing and insert the chosen nozzle directly into the hose for an effective seal before flushing.

• 3/4" garden-hose quick-connect adapter and 1/2" quick connector
• 3/4" female-thread shut-off valve for on-tool flow control
• Nozzles sized for 0.7"–1.6" (19–40 mm) hose bores
• Standard 1/4" air inlet compatibility for shop compressors

Is the flush gun durable and safe to use with coolant and cleaners?

Components are made from corrosion-resistant metals and durable polymers chosen to tolerate automotive coolants and common cleaning solutions. The quick-connect seals and robust trigger mechanism reduce leakage and accidental spray during use. Always follow vehicle manufacturer guidance and avoid excessive pressure; the tool is engineered for cleaning, not pressurizing sealed cooling systems.

• Corrosion-resistant construction for longer service life
• Secure quick-connects to minimize leaks and mess
• Ergonomic trigger with locking latch for safer operation
• Designed for cleaning only — not pressurizing closed systems

How easy is setup and operation for a DIYer or technician?

Setup takes only minutes: attach the appropriate quick-connect to your garden hose and shop air, choose the nozzle that fits the cooling hose, insert it, open the shut-off valve, then squeeze the trigger. The simple controls and visible flow response let you tailor pressure and duration to the job. Quick-change fittings let technicians switch hoses and nozzles fast between vehicles or cooling components.

• Fast tool-free connections with included adapters
• Trigger control for incremental flow adjustments
• Nozzle choices for most common cooling-hose diameters
• Works with standard garden hoses and shop air lines

Who is this for: the LURKA Coolant System Flush Gun is aimed at mechanics, fleet maintenance teams, and hands-on vehicle owners who need a reliable, adaptable flushing solution. It’s especially useful for anyone who services multiple vehicle models or frequently maintains heaters, radiators, and industrial cooling circuits and wants a kit that reduces additional parts purchases while improving cleaning effectiveness.