Aupoko AC oil and dye injector — 2 oz hand-turn screw-in with 1/4" SAE quick coupler, aluminum body

Aupoko's 2 oz hand-turn AC oil and fluorescent dye injector is a screw-in refill tool with a snap quick coupler designed to introduce lubricant or UV dye into refrigerant systems without relying on the compressor.

This compact injector combines a 2 oz (60 ml) cartridge with a 1/4" SAE quick-connect to make adding oil or UV tracer dye to automotive and small HVAC systems faster and less messy. Engineered with an aluminum alloy body, brass fittings, and a user-friendly hand-turn screw mechanism, the tool works on low-side ports for common refrigerants including R410A, R134A, R22 and R12. It’s intended for service techs, DIY mechanics and HVAC hobbyists who need a controlled, compressor-independent method to top up oil or introduce fluorescent dyes for leak detection and diagnostics.

How does the injector deliver oil or dye without the compressor running?

The injector uses a screw-in cartridge and internal check valve to force oil or dye into the system by hand-turn pressure rather than relying on system pressure. Tightening the inner core displaces the cartridge contents in a measured way and the check valve prevents backflow into the canister.

• Hand-turn screw mechanism discharges fluid gradually for controlled filling.
• Internal check valve keeps refrigerant from entering the injector.
• Inner core vent allows air release before injection for smoother flow.

What refrigerants and oil types is this injector compatible with?

The Aupoko injector is built to work with a wide range of common automotive and small HVAC refrigerants and oils. It accepts POE and mineral oils and can introduce fluorescent UV dyes formulated for refrigeration leak tracing.

• Compatible refrigerants: R410A, R134A, R22, R12.
• Accepts POE and mineral-based oils and standard UV tracer dyes.
• 1/4" SAE low-side 13 mm female quick coupler fits most service ports.

How easy is setup and use for a typical service visit?

Setup is straightforward: screw the check valve onto the cartridge, assemble inner and outer cylinders, bleed a little air through the inner core, then attach the quick coupler to the low-side port. The tool’s hand-turn action and snap-on coupler let a single technician accurately add the needed amount without special pumps.

• Three-part assembly: cartridge, check-valve connector, outer cylinder.
• Snap quick coupler makes one-handed connection to low-side port.
• Simple bleed step reduces air pockets before injecting fluid.

Will this injector fit all AC systems and what about adapters?

The tool fits most vehicle and small HVAC low-side fittings via its 1/4" SAE female connector, but some R410A systems use larger 5/16" ports. If your equipment requires it, use the compatible CV23p adapter for select 5/16" R410A fittings to ensure a secure connection.

• Standard 1/4" SAE connector suits the majority of systems.
• Use CV23p adapter for specific 5/16" R410A service ports when needed.
• Aluminum body and brass connector resist corrosion in service environments.

Who this product is for: The Aupoko AC Oil and Dye Injector is aimed at professional technicians, mobile mechanics and experienced DIYers who routinely service automotive or small HVAC systems and need a portable, controlled way to add lubricant or UV dye. It’s useful when a compressor is weak or when diagnosing leaks with fluorescent tracers, and for anyone seeking a durable, easy-to-use hand-fill accessory that reduces mess and speeds routine maintenance. The product is backed by Aupoko’s 12-month warranty and the company offers customer support to help with installation questions or compatibility concerns.