Optimise the performance and accuracy of your AC and refrigeration projects with this 4CFM Vacuum Pump Set 1/3HP 1 Stage HVAC Refrigeration AC Auto Repair Tools. Featuring lightweight cast aluminium and an ergonomic grip handle, this refrigerant vacuum pump promises remarkable sturdiness, durability, comfort, and portability. Plus, the direct-driven, all-copper motor ensures effortless start-up, while the built-in cooling fan and aluminium alloy casing provide thermal protection and effective heat dissipation. Moreover, the three-colour hoses allow for precise operation at pressures ranging from 600PSI to 3000PSI, while the brass-fitted safety caps prevent oil leaks, boosting safety. Additionally, the 1/4" oil fill port simplifies oil addition, the oil drain hole speeds up oil drainage, and the gas exhaust port prevents oil spouting efficiently. Besides, the backflow prevention technology minimises chamber contamination for optimal performance and longevity. Even better, the manifold gauges are compatible with R502, R410, R134A, R12, and R22, making them versatile for air conditioner cleaning, vehicle maintenance, vacuum packaging, refrigerator vacuuming, and industrial applications.