DUMOS AC Vacuum Pump & R134a Manifold Gauge Set — 4 CFM Kit with Leak Detector, 1/3 HP Motor

This all-in-one kit combines a powerful single-stage vacuum pump, a full manifold gauge set calibrated for R134a and other common refrigerants, a compact electronic leak detector, plus hoses, adapters and a durable carry bag. Designed for technicians and informed DIYers, the package focuses on fast evacuation, clear pressure readings and flexible, leak-resistant connections for a variety of refrigerants.

How fast and deep can the vacuum pump evacuate an AC system?

The DUMOS pump features a 1/3 HP motor and 4 CFM free air displacement for rapid evacuation of system moisture and non-condensables. Its single-stage rotary vane design and thermal protection let you run extended pull-downs while maintaining steady performance.

• 4 CFM free air displacement for efficient pump-downs
• 1/3 HP motor delivering consistent rotary-vane evacuation
• Built-in cooling fan and thermal protection for longer duty cycles
• Visible oil window and bottom drain port for clean oil changes

What refrigerants and pressures do the manifold gauges support?

The included aluminum manifold gauge set offers high and low gauges with clear faceplates that cover typical automotive and light commercial ranges. It’s engineered for R134a and compatible with r410a, r22, r12 and r404a when used with the correct adapters and service procedures.

• Low-side and high-side gauges with 0–140 psi and 0–400 psi ranges
• Color-coded controls and ports for safer hookup and operation
• R134a ready; adapters included for other common refrigerants
• Sturdy aluminum manifold housing for workshop durability

How does the leak detector and hose kit improve troubleshooting?

This set bundles a compact leak detector with three 1.5 m color-coded hoses rated up to 4000 psi and quick couplers for secure, fast connections. The detector helps locate escaped refrigerant, while the hoses and adapters reduce leaks during service and speed up switching between systems.

• Electronic leak detector for on-system refrigerant detection
• Three 1.5 m hoses, color-coded for easy identification
• Quick couplers and R410A adapters for tight, reliable seals
• Assorted fittings and can tap for cylinder and service access

What maintenance and handling features make this kit workshop-friendly?

Practical details like the large 330 ml oil chamber with an oil-view window, bottom drain port for clean oil changes, and an anti-slip base help keep the pump reliable and tidy. The carry bag organizes components and protects gauges and the detector during transport.

• 330 ml oil chamber with sight glass for quick level checks
• Bottom drain port simplifies oil changes with minimal mess
• Anti-slip base improves stability during operation
• Durable carry bag stores pump, gauges, hoses and accessories neatly

Who is this for? The DUMOS kit suits HVAC technicians, mobile AC specialists and advanced DIYers who need a single portable solution for evacuation, leak detection and refrigerant service. It’s ideal for automotive air conditioning repairs and light commercial refrigeration work where accurate gauges, fast vacuum capability and secure hose connections matter. If you require high-volume industrial pumping or factory-level certification, consider a larger multi-stage pump and calibrated lab equipment; for routine on-site service and repairs, this DUMOS kit balances performance, convenience and value.