Orion Motor Tech 3-Way AC Manifold Gauge Set — R1234yf/R134a/R404a, 5ft Hoses, Oil-Filled Gauges

Orion Motor Tech's OMT 3-Way AC manifold gauge set is a complete, aluminum-bodied HVAC diagnostic and recharge kit built for R1234yf, R134a and R404a service tasks.

This compact manifold gauge set combines durable, oil-filled high/low gauges, a three-way selector, five-foot color-coded hoses and a full suite of service fittings so technicians and DIYers can measure pressures, evacuate lines and refill refrigerant without swapping tools. Built with reinforced PVC hoses and pure copper fittings, the kit balances field-ready toughness with the accuracy needed for repeatable measurements.

How accurate and durable are the gauges for routine service?

The OMT set uses oil-filled cores on the high and low pressure gauges for improved shock resistance and stable needle movement. Calibration screws allow you to adjust readings to stay within about 1.6% accuracy, while the dry dial design helps maintain readable performance in colder conditions.

• Oil-filled high/low gauges reduce vibration error and extend life
• Calibration screws for field recalibration and long-term accuracy
• Dry dial element for reliable low-temperature readability

Which refrigerants and service actions can I perform with this kit?

This manifold set is sized and supplied for R1234yf, R134a and R404a work, covering common automotive and light-commercial A/C systems. Use the three-way selector and included quick couplers to measure system pressure, evacuate or backfill coolant and connect service cans or recovery equipment as needed.

• Includes can taps and quick couplers for both R1234yf and R134a
• Three-way valve lets you isolate, read, or vent the system
• Suitable for pressure testing, evacuation and refrigerant charging

What construction features help this kit hold up under shop use?

The manifold body is machined from aluminum for light weight and corrosion resistance, while pure copper fittings resist rust where hoses and adapters connect. Hoses are four-layer reinforced PVC rated for high working pressures, and the kit includes left- and right-hand threaded adapters to fit a variety of service ports.

• Aluminum manifold body for strength and lower weight
• Pure copper fittings reduce corrosion at threaded connections
• Four-layer reinforced PVC hoses withstand up to 600 psi working pressure

What accessories come in the box and how do they save time?

The kit ships with three five-foot color-coded hoses (red, blue, yellow), two R1234yf quick couplers, two R134a quick couplers, self-sealing can taps for each refrigerant type and two 1/4" male to 1/2" female adapters (LH & RH). These ready-made connections reduce the need to source separate fittings and let you switch between refrigerant types quickly.

• Five-foot hoses provide flexible reach to service ports and cylinders
• Self-sealing can taps simplify refrigerant can connections
• Both LH and RH threaded adapters included for cross-compatibility

Who this is for: The Orion Motor Tech OMT 3-Way manifold gauge set is designed for professional mechanics, mobile A/C technicians and experienced DIYers who service modern automotive and light-commercial cooling systems. If you need a rugged, multi-refrigerant kit that combines field adjustability, reinforced hoses and a full complement of fittings, this set provides a practical balance of accuracy, durability and value without requiring separate tools for each refrigerant type.