Qnbes AC Oil Dye Injector for R134A/R12/R22 — 2 oz Brass Injector, SAE Couplers

A compact brass injector that lets you add 2 oz of compressor oil or UV dye safely into R134A/R12/R22 automotive and HVAC systems.

Qnbes AC Oil Dye Injector is a rugged, refillable tool designed to simplify introducing oil or fluorescent dye into vehicle and small HVAC refrigerant circuits. Built from solid brass and fitted with standard SAE and low‑pressure couplers, this injector supports fast filling, secure sealing, and reliable connections for leak detection and oil top‑ups. Its 60 ml capacity reduces trips to the shop while the included couplers adapt to common R134A service ports.

How do I use the injector step‑by‑step?

Using the injector is straightforward if you follow safety steps and ensure the compressor is running. Close the injector valve before loading fluid, secure the threaded end after filling, attach the appropriate couplers, then open the valve while the system is charged to introduce the oil or dye.

• Close shut‑off valve before loading additive.
• Unscrew the syringe end, pour in up to 2 oz (60 ml), then tighten firmly.
• Connect R134A/R12 low‑side coupler to vehicle service port and injector.
• Run AC with compressor engaged and open injector valve to inject.
• Clean tool after use with brake cleaner to remove residue.

Which refrigerants and oils is this compatible with?

The Qnbes injector works with common automotive and small refrigeration systems, supporting R134A, R12 and R22 service operations. It accepts a wide range of lubricants including POE and mineral oils, and is suitable for adding fluorescent dyes used in leak detection.

• Fits R134A, R12 and R22 systems with standard low‑side ports.
• Accepts POE, mineral oils, and fluorescent dye solutions.
• 1/4" SAE thread and low‑voltage 13 mm ID coupler for common hookups.
• Works with both automotive and small residential/commercial units.

What construction and pressure ratings should I expect?

Made from solid brass, the injector resists wear and corrosion for repeated field use and maintains a tight seal to minimize leaks. It’s engineered to handle typical service pressures encountered during charging and diagnostic work, so it’s robust enough for professional and DIY tasks.

• Solid brass metal body for durability and corrosion resistance.
• Good sealing design to reduce accidental leakage during use.
• Rated to work across common service pressures (600–3000 PSI operational range).
• 2 oz (60 ml) capacity for quick, single‑session fills.

How do I keep the injector safe and maintain performance?

Routine cleaning and correct storage preserve performance and prevent contamination of refrigerant circuits. After each use, purge remaining fluid, flush the injector with an appropriate cleaner, and store it capped and dry.

• Empty and wipe internal surfaces after injection jobs.
• Clean with brake cleaner or approved solvent to remove oil and dye residues.
• Store with couplers capped to keep debris out of seals.
• Inspect O‑rings and threads before each use for wear or damage.

Who is this for: Technicians, mobile mechanics, and advanced DIYers who perform refrigerant system maintenance or leak detection will appreciate the Qnbes injector’s compact 2 oz capacity, brass construction, and universal couplers. It’s particularly useful for topping off compressor oil, introducing fluorescent dyes for leak tracing, and performing quick service tasks on R134A/R12/R22 systems without repeatedly handling small bottles or improvised fittings.