VIVOHOME 110V 1/4 HP 3.5 CFM Single Stage Rotary Vane AC Vacuum

The VIVOHOME 1/4 HP AC Vacuum Pump is an essential tool designed to evacuate air and moisture from air conditioning systems before recharging them with refrigerant. Powered by a 180W, four-pole pure copper motor running at 1440 r/min, this rotary vane unit delivers a 3.5 CFM flow rate and reaches an ultimate vacuum of 5 Pa in approximately 3 minutes. It suits DIYers and technicians looking to handle standard automotive or home AC maintenance without complex equipment.

Connecting to various cooling setups is straightforward thanks to the included 1/4-inch SAE and 1/2-inch Acme intake fittings. Out of the box, the pump supports common refrigerants including R134a, R12, R22, and R502. It can also service R410a systems, provided you supply your own 5/16-inch adapter. Physical durability comes from a single-piece die-cast aluminum housing that protects internal mechanisms from accidental drops while remaining lightweight enough to transport easily.

Day-to-day operation is clean and low-maintenance. The intake features a 304 stainless steel coarse filter to block debris from entering the pump chamber, while the exhaust port uses a cotton layer filter to trap oil mist. Routine maintenance is equally simple: a clear viewing window lets you monitor oil levels at a glance, a top port handles refills, and a bottom drain valve speeds up fluid changes. Operating noise sits around 65 dB, supported by a built-in cooling fan, non-slip base, and an ergonomic carrying handle.

There are a few limits to note based on the specifications. Because this is a single-stage pump, it is intended to operate within its recommended duty cycle rather than continuous industrial running. Motor current protection prevents damage against overload or phase loss, but you will still need to plan your evacuation routines accordingly. Additionally, anyone working on modern R410a mini-split systems must purchase a separate 5/16-inch adapter beforehand.

Verdict: The VIVOHOME 3.5 CFM Vacuum Pump is a dependable, well-protected tool for anyone servicing R134a, R22, or similar AC systems. If you need a compact pump with built-in filtration and easy oil maintenance for routine diagnostic and recharge work, it is a practical choice.

• Motor Power: 1/4 HP (180W)
• Voltage: 110V
• Motor Speed: 1440 r/min
• Flow Rate: 3.5 CFM
• Ultimate Vacuum: 5 Pa
• Housing Material: Die-cast aluminum
• Motor Type: 4-pole pure copper
• Intake Ports: 1/4-inch SAE, 1/2-inch Acme
• Refrigerant Compatibility: R134a, R12, R22, R502 (R410a with optional adapter)
• Noise Level: Approximately 65 dB
• Filtration: 304 stainless steel intake filter, cotton exhaust filter

A great fit if you:

• Need to pull moisture and air out of AC systems using R134a, R12, R22, or R502 refrigerants.
• Want an easy-to-carry pump with a built-in handle, oil viewing window, and bottom drain plug.
• Appreciate built-in motor safety features like current overload and phase loss protection.

Consider something else if you:

• Need to service R410a equipment immediately without buying an extra 5/16-inch adapter.
• Require a dual-stage industrial setup for continuous, heavy commercial evacuations.

Can this vacuum pump be used on R410a systems?
Yes, but you will need to purchase a separate 5/16-inch adapter, as it is not included in the package.

What intake fittings come built into the pump?
The unit features both a 1/4-inch SAE fitting and a 1/2-inch Acme intake fitting for broad connection options.

How do you check and change the pump oil?
The housing includes a clear sight glass for monitoring fluid levels, a dedicated top oil fill port, and a bottom drain valve for clean oil changes.

How loud is the pump during operation?
The pump operates at approximately 65 dB and features a non-slip base and cooling fan for steady, low-noise performance.