Orion Motor Tech 4-Way Automotive AC Diagnostic Manifold Gauge Set — R134a/R410a/R22, hybrid anti-shock gauges

The OMT 4-way Automotive AC Diagnostic Manifold Gauge Set is a complete, durable toolkit for measuring, evacuating, and charging vehicle HVAC systems using R134a, R22, or R410a refrigerants.

If you service car air conditioning, whether as a professional technician or a hands-on DIYer, this Orion Motor Tech manifold set groups the core tools into one compact kit. It combines a four-way manifold with hybrid anti-shock gauges, color-coded heavy-duty hoses, multiple adapters, and a puncture can tap so you can diagnose pressures, evacuate lines, and add refrigerant without hunting for separate parts. The build uses brass fittings, reinforced PVC hoses, and calibration adjustments to keep readings reliable under demanding use.

How accurate and durable are the gauges for field use?

The gauges use a hybrid design that merges the shock resistance of an oil-filled core with a dry dial face to preserve performance in colder conditions. Adjustable calibration screws let you fine-tune readings, and the sealed construction resists wear from workshop vibrations and drops.

• 2.6-inch high and low pressure dials with oil-core and dry-dial combo
• Calibration screws for approximately 1.6% accuracy
• Rugged ABS housing and shock-tolerant internals for long service life

What connections and adapters are included for different systems?

This set arrives with multiple threaded adapters and quick couplers so you can link to common service ports and refrigerant cans without additional fittings. The kit includes both straight and angled adapters to reach tight locations, plus a trap adapter and tank fittings for varied service tasks.

• Two adjustable 1/4" quick couplers for fast connect/disconnect
• 1/2" to 1/4" 29° trap adapter, 1/4" to 5/16" tank adapter, angled and straight 5/16" to 1/4" adapters
• Puncture-style can tap for standard refrigerant cans

Are the hoses safe and suitable for high pressure work?

The hoses are four-layer PVC with color coding for low, high, charge, and evacuation lines, built to stand up under routine shop pressures and accidental overpressure. Each hose is rated for working pressures commonly seen in automotive HVAC service and has a high burst resistance for added safety.

• Color-coded: blue (low), red (high), yellow (charge), black (evacuation)
• Designed for normal service working pressure up to 800 psi with 4000 psi burst resistance
• Reinforced PVC construction for abrasion and kink resistance

Which refrigerants and tasks can this manifold set handle?

The manifold supports multiple refrigerant types used in vehicle and light HVAC systems and covers the common diagnostic and service operations technicians perform. Use it to read system pressures, evacuate lines, and refill coolant, keeping in mind applicable safety and environmental handling procedures for each refrigerant.

• Compatible with R134a, R22, and R410a refrigerants
• Useful for pressure checks, evacuation, and charging operations
• Includes moisture indicator to monitor system condition during service

Who is this for: The Orion Motor Tech OMT 4-way manifold gauge set is intended for professional mechanics, HVAC technicians, and experienced DIYers who service automotive air conditioning. It’s built for repeated workshop use, offers multiple adapters for flexible connections, and provides durability features that help preserve measurement accuracy across routine diagnostics and charging tasks. Always follow refrigerant handling regulations and safety procedures when using this equipment.