Radiator Coolant Vacuum Refill Kit with Gauge and Adapters

Radiator vacuum refill kit pulls a strong vacuum to refill coolant fast and help prevent air pockets for smoother cooling-system circulation. Connects to a standard air compressor (not included) to purge and fill in one workflow, reducing messy bleed cycles after radiator, hose, thermostat, or water-pump service. Built with aluminum, sealed adapters, and a clear fill hose for controlled flow.

• Delivers vacuum-and-fill operation to help avoid airlocks and cut manual bleeding time.


• Fits most vehicles with 35/40/45/55 mm adapters plus a tapered universal adapter (0.55–1.8 in).


• Includes shock-resistant gauge for clear vacuum readings during purge and refill.


• Connects easily via brass quick connectors; includes thread seal tape for secure hookups.


• Keeps parts organized in a dustproof, waterproof toolbox for shop or mobile use.

Use this cooling system vacuum fill tool whenever you drain coolant—especially after component swaps—so you can refill cleanly and check for vacuum hold before adding fluid. The transparent 1 m fill hose helps you monitor flow, while the built-in filter helps keep debris out of the radiator. For safe operation, never service a hot engine and wear eye and hand protection when handling coolant. Grab yours today and keep your coolant refills quick, tidy, and repeatable.

• Maximum vacuum: -0.83 bar / -83 kPa (-62 cmHg)


• Gauge range: -76 to 0 cmHg / -30 to 0 inHg


• Materials: 6061-T5 aluminum, rubber, PA66


• Adapters OD: 1.38/1.57/1.77/2.17 in (35/40/45/55 mm); tapered adapter fits 0.55–1.8 in


• Fill hose: 3.3 ft / 1 m, transparent, with built-in filter


• Air connection: US standard nozzle + additional EU nozzle (compressor not included)


• Toolbox size: 12.2 × 9.1 × 2.6 in (310 × 230 × 65 mm)


• Net weight: 2.8 lb / 1.25 kg