OMT 4.5 CFM Single Stage Vacuum Pump for R134a R410a R22 Auto

The Orion Motor Tech single stage vacuum pump delivers reliable evacuation for automotive and light HVAC servicing. Powered by a 1/3 hp all-copper motor, it draws down systems to an ultimate vacuum level of 37.5 microns (5 Pa) with a 4.5 cfm flow rate. This makes it a practical solution for technicians and DIYers working on AC systems charged with R12, R22, R134a, R410a, or R502 refrigerants.

Durability and clean operation are central to the pump's construction. The reinforced aluminum alloy casing assists with heat dissipation during operation while resisting corrosion over time. To protect internal components and keep your workspace tidy, an integrated intake filter and trap block incoming debris and minimize oil mist release.

Day-to-day usability is straightforward thanks to thoughtful physical details. The oil reservoir features a built-in sight glass with level markings so you can check fluid condition and fill status at a glance. When moving between jobs, the nonslip handle provides a secure grip. Port compatibility with 1/4-inch, 1/2-inch, and 3/8-inch hoses broadens its utility beyond air conditioning to tasks like thermoforming, wine degassing, and vacuum packaging.

Because this is a single-stage pump, users requiring the multi-stage drawdown of two-stage units should note the configuration. Maintenance also requires monitoring the reservoir and periodically refilling fluid, though the package gets you started immediately by providing the required lubricating oil, Teflon tape, and gloves in the box.

Verdict: The Orion Motor Tech 4.5 CFM pump is an effective, service-ready option for auto repair and home DIY vacuum tasks. If you need a reliable pump compatible with standard refrigerants and multiple hose sizes, this complete kit fits the bill.

• Motor: 1/3 HP all-copper motor
• Flow Rate: 4.5 CFM
• Ultimate Vacuum: 37.5 microns (5 Pa)
• Housing Material: Reinforced aluminum alloy
• Hose Compatibility: 1/4 inch, 1/2 inch, and 3/8 inch
• Refrigerant Compatibility: R12, R22, R134a, R410a, R502
• Included Accessories: Lubricating oil, one pair of gloves, Teflon tape

A great fit if you:

• Service automotive or home AC systems using R134a, R410a, R22, R12, or R502 refrigerants
• Need an out-of-the-box kit with oil, tape, and gloves included
• Perform general vacuum projects such as wine degassing, thermoforming, or vacuum packaging
• Want flexible connection options for 1/4-inch, 3/8-inch, or 1/2-inch hoses

Consider something else if you:

• Require a dual-stage pump for specialized industrial applications
• Prefer maintenance-free equipment that does not use oil

What refrigerants is this vacuum pump compatible with?
The pump is designed to service air conditioning systems that use R12, R22, R134a, R410a, and R502 refrigerants.

What accessories come in the package?
The pump comes with lubricating and absorptive oil, a pair of one-size-fits-most gloves for refilling, and Teflon tape for threaded connections.

What hose sizes can connect to this pump?
It is compatible with 1/4-inch, 1/2-inch, and 3/8-inch hoses.

Can this unit be used for tasks other than HVAC repair?
Yes, it is suitable for wine degassing, vacuum packaging, and thermoforming projects.