VIVOHOME 110V 1/3 HP 4.5 CFM Single Stage HVAC Vacuum Pump with

The VIVOHOME 110V 1/3 HP HVAC Vacuum Pump is designed for technicians and DIYers who need to evacuate air and moisture from air conditioning and refrigeration systems. Driven by a 250W four-pole pure copper motor spinning at 1728 r/min, this single-stage pump delivers 4.5 CFM of airflow and draws down to an ultimate vacuum of 5 Pa in about 3 minutes.

Daily operation is straightforward thanks to practical hardware features. The pump connects via a standard 1/4 inch SAE inlet, making it directly compatible with R134a, R12, R22, and R502 setups. A one-piece die-cast aluminum housing protects the internal assembly from jobsite bumps, while an ergonomic carry handle makes transporting the unit between vehicles and service locations manageable. It also operates at roughly 65 dB, supported by a built-in cooling fan and a stabilizing non-slip base to reduce vibration.

Maintenance and pump longevity are built into the layout. A 304 stainless steel coarse filter prevents debris from entering the pump chamber, and an exhaust cotton layer helps trap oil mist and particles. When it is time to inspect or change the oil, a clear sight glass lets you check fluid levels instantly, and a dedicated bottom drain valve allows clean emptying without spills.

A few limitations are worth noting. While it supports R410a systems, you must source a 5/16 inch adapter separately since it is not included in the box. Because this is a single-stage pump, users needing multi-stage deep evacuation for specialized industrial setups may need to look elsewhere.

Verdict: This VIVOHOME unit is a solid, reliable choice for automotive mechanics and residential HVAC technicians looking for a durable, portable pump for common refrigerant lines. It balances rapid evacuation, quiet operation, and mess-free upkeep in an easy-to-carry package.

• Motor Power: 1/3 HP (250W)
• Voltage: 110V
• Airflow Capacity: 4.5 CFM
• Rotational Speed: 1728 r/min
• Ultimate Vacuum: 5 Pa (reached in 3 minutes)
• Inlet Port: 1/4 inch SAE
• Noise Level: Approximately 65 dB
• Housing Material: One-piece die-cast aluminum
• Motor Type: Four-pole pure copper
• Filter Material: 304 stainless steel
• Compatible Refrigerants: R134a, R12, R22, R502 (R410a with extra adapter)

A great fit if you:

• Service automotive air conditioners using R134a or R12 refrigerants.
• Maintain home HVAC systems running on R22 or R502.
• Need a portable vacuum pump that is easy to carry between job sites.
• Want an easy-to-maintain unit with a direct sight glass and bottom oil drain.

Consider something else if you:

• Require out-of-the-box R410a compatibility without buying a separate 5/16 inch adapter.
• Need a dual-stage vacuum pump for deeper laboratory or heavy industrial evacuations.

Which refrigerants work with this vacuum pump?
It works directly with R134a, R12, R22, and R502 using the standard 1/4 inch SAE inlet. It can also service R410a systems if you purchase a separate 5/16 inch adapter.

How noisy is this pump during operation?
It operates at approximately 65 dB and includes a non-slip base and integrated cooling fan to keep operation stable and relatively quiet.

How do you check and drain the pump oil?
The pump features a clear oil sight window on the side to monitor fluid levels and conditions, along with a bottom-mounted drain valve for clean oil changes.

How fast does it reach an ultimate vacuum?
Powered by its 1/3 HP motor running at 1728 r/min, the unit reaches an ultimate vacuum of 5 Pa in approximately 3 minutes.