Gulfmew Coolant System Flush Gun – Lever‑Action Heater Core Flush Kit, 5 Nozzles & Lockable Trigger

Gulfmew's Coolant System Flush Gun is a lever‑action heater core flush kit that uses controlled water and air to backflush radiator and heater core passages, removing rust, scale, and debris.

This compact kit combines a sturdy flushing gun, multiple coolant bleeder nozzles, two garden‑hose connectors and PTFE tape so you can perform a targeted heater core or radiator backflush in a home garage or professional shop. Built from corrosion‑resistant materials, the tool is designed to survive repeated exposure to coolant, water and workshop conditions while giving you adjustable flow and a lockable trigger for hands‑free operation.

How does the Gulfmew flush gun remove buildup from a heater core or radiator?

The flush gun forces a mix of pressurized water and compressed air through heater core passages to dislodge and carry away trapped rust, scale and debris. You can vary the flow with the trigger to match delicate cores or stubborn blockages, and the included nozzles let you adapt to different hose diameters for a better seal and stronger backpressure.

• Lever‑action trigger controls water flow and pressure for precise flushing.
• Air‑assisted backflush improves debris removal versus water alone.
• Multiple nozzle sizes (19mm–40mm) to match common coolant line openings.

What connections and fittings are included, and will they fit my vehicle?

The kit ships with two garden hose connectors sized for 3/4" hoses (16mm ID / 20mm OD), a 1/4" air inlet for shop air lines, and a set of coolant bleeder nozzles covering commonly used diameters. These fittings make it simple to attach standard hoses and compressed air so you can flush heater cores, radiators and other cooling passages without specialty adapters in many cases.

• Garden hose connectors match 3/4" hose inner/outer diameters (16/20mm).
• 1/4" air inlet connects to most workshop air lines for pneumatic assist.
• Nozzles included: 19mm, 29mm, 32mm, 36.5mm, 40mm for broad compatibility.

How easy is the Gulfmew kit to use safely in a garage setting?

Assembly is straightforward: attach the garden hose and air line, seal threads with the supplied PTFE tape, select a nozzle and insert it into the hose or core opening, then open the water and actuate the trigger. The trigger lock holds the handle for continuous operation, reducing hand fatigue and allowing controlled, hands‑free flushing when needed.

• PTFE tape included to ensure leak‑free threaded connections.
• Trigger locking latch enables continuous flow without constant pressure.
• Corrosion‑resistant construction for long life in coolant environments.

What results can I expect and how should I follow up after flushing?

A proper backflush with this tool will typically remove loose rust, sediment and scale that restrict coolant flow and reduce heater output. After flushing, inspect the expelled fluid for particulate, rinse until clear water runs, then refill and bleed the cooling system per vehicle manufacturer procedures to avoid air pockets.

• Expect clearer discharge fluid once internal debris is removed.
• Repeat flushes or use a cleaning agent if heavy contamination persists.
• Always properly refill and bleed the cooling system after maintenance.

Who this is for: The Gulfmew Coolant System Flush Gun is aimed at DIY mechanics, mobile technicians and small workshops that need a reliable, portable solution for heater core and radiator maintenance. If you perform periodic cooling system servicing, restore heater performance, or prepare vehicles for sale, this kit gives a compact, affordable way to tackle clogs and buildup without renting large shop equipment.