OMT 4.5 CFM AC Vacuum Pump and Gauge Set for R134a R22

The OrionMotorTech 4.5 CFM AC Vacuum Pump and Gauge Set is an all-in-one service package designed for servicing automotive and residential cooling systems. Powered by a 1/3 HP all-copper motor housed in an aluminum alloy casing, this unit evacuates air conditioning systems efficiently while dissipating heat and resisting corrosion. It serves DIYers and technicians looking to handle HVAC maintenance without piecing together individual tools.

Diagnostics and servicing rely on the included 4-way manifold gauge set, which delivers real-time pressure readings during refrigerant charging. The kit comes with 4-layer color-coded hoses capable of handling up to 800 psi working pressure and 4,000 psi burst pressure. For locating issues before recharging, an electronic leak detector is bundled in the package alongside R134a can taps, quick couplers, and R410a adapters.

Routine maintenance of the pump is straightforward thanks to practical hardware features. A built-in cooling fan prevents overheating during long run times, while tethered brass safety caps stop oil from leaking during transport. Users can monitor oil levels through the integrated sight glass and perform oil changes via the bottom drain valve using the supplied 0.26-quart oil bottle.

As a trade-off, this is a comprehensive setup with many distinct parts, meaning users must keep track of various fittings and manage regular oil upkeep to maintain performance. The product information also does not list specific hose lengths or the exact physical weight of the full kit when packed inside the carrying case.

Verdict: This OrionMotorTech set is a solid choice for anyone servicing R134a, R22, or R410a systems who wants a pump, gauges, and leak detector in a single organized kit. It delivers all the core hardware necessary for complete AC evacuation and charging right out of the box.

• Flow Rate: 4.5 CFM
• Motor Power: 1/3 HP
• Motor Material: All-copper
• Casing Material: Aluminum alloy
• Hose Working Pressure: 800 psi (4,000 psi burst)
• Included Oil Volume: 0.26 qt
• Refrigerant Compatibility: R134a, R22, R410a

A great fit if you:

• Service automotive air conditioners, home HVAC units, or mini split systems.
• Need a complete package with gauges, hoses, leak detector, and adapters in one purchase.
• Work with R134a, R22, or R410a refrigerants.

Consider something else if you:

• Already own manifold gauges and only require a standalone vacuum pump.
• Need equipment rated for refrigerants outside of R134a, R22, and R410a.

What refrigerants work with this kit?
The set is compatible with R134a, R22, and R410a systems, and it includes R134a can taps, quick couplers, and R410a adapters.

Does the pump come with vacuum oil?
Yes, the package includes 0.26 quarts of vacuum oil so you can use the pump right away.

What pressure levels can the hoses handle?
The 4-layer color-coded hoses support a working pressure of up to 800 psi and a burst pressure of up to 4,000 psi.

How do you monitor and change the pump oil?
The pump features an oil sight glass for quick level checks and a bottom drain valve for mess-free oil changes.