VIVOHOME VH322 4 CFM Vacuum Pump Kit with R134a Manifold and Leak Detector

Some A/C jobs call for evacuation equipment, while others are easier to organize with gauges and service accessories together. The VIVOHOME VH322 combines a vacuum pump, manifold gauge set, leak detector, and fittings for automotive A/C and HVAC servicing.

Its 110V, 1/3 HP single-stage rotary vane pump is rated at 4 CFM and removes moisture before refrigerant charging. The color-coded hoses and included adapters help connect the kit to compatible systems.

Tech summary

The pump’s die-cast aluminum body and anti-slip base provide a stable setup, and a built-in cooling fan supports extended operation. A clear oil sight glass makes it easier to check the oil level, while the bottom drain port simplifies oil changes. The kit includes 0.35 qt/330 ml of pump oil.

The manifold has a large viewing glass for observing refrigerant flow and a shock-resistant core. Buyer feedback often appreciates the kit’s range of components and ease of setup. Experiences with gauge accuracy are mixed, and some buyers report hose leaks or durability problems, so careful connection and inspection are part of the servicing workflow.

How to use it

Use the pump during the evacuation stage before charging an automotive A/C or HVAC system. The three 5 ft hoses are color-coded for high pressure (red), low pressure (blue), and service (yellow), making their roles easier to identify while connecting the manifold. Keep the pump level during operation and use the sight glass to monitor its oil level.

The kit is listed for R134a, R12, R22, R502, and R410a systems. For R410a connections, use the included 1/4-inch-to-5/16-inch adapter. Choose the R134a can tap that matches the refrigerant container: the kit provides both self-sealing and piercing-style taps.

Box contents

The set includes the 4 CFM vacuum pump, manifold gauge set, three color-coded hoses, leak detector, R410a adapters, R134a can taps, quick couplers, carry bag, and pump oil. This bundled approach suits users who want evacuation and refrigerant-service tools together, those choosing equipment one piece at a time may prefer to assemble a setup around their existing tools.

Questions before you buy

Which refrigerants can the kit be used with? It is listed for R134a, R12, R22, R502, and R410a systems. R410a connections use the included 1/4-inch-to-5/16-inch adapter.

What do the hose colors indicate? Red is for the high-pressure side, blue for the low-pressure side, and yellow for service. The color coding helps identify each hose during connection and use.

How do I choose the R134a can tap? Select the self-sealing or piercing-style tap to match the type of refrigerant container being used.

When it makes sense

The VH322 is a practical fit for home mechanics and HVAC users handling automotive A/C, residential systems, heat pumps, and 1–3 HP split, window, or portable A/C units. Its 4 CFM pump, manifold, hoses, leak detector, and service fittings bring key parts of an evacuation and charging setup into one portable kit.