Tellegloww AC Oil Dye Injector Kit — 2 oz Hand Push 1/4" SAE with R134a/R1234yf/R410a Adapters, Aluminum Alloy

The Tellegloww AC Oil Dye Injector Kit is a compact, hand-operated 2 oz injector and adaptor set designed to safely add oil or fluorescent dye into automotive and HVAC low-side systems without a running compressor.

This lightweight aluminum-alloy injector combines brass 1/4" SAE fittings and three quick-coupler adapters so you can introduce oil or dye into R22, R134a, R404a, R410a, R1234yf and many halogenated refrigerant systems. It’s a one-person tool intended for quick diagnostic or maintenance tasks where you want controlled metering of up to 1 oz (30 ml) per push, and it eliminates the need to use the system compressor during the injection procedure.

How do I connect the injector to my vehicle or HVAC low-side port?

Attach the appropriate quick coupler for your refrigerant type, then screw the injector onto the low-side service port. The kit includes R134a and R1234yf couplers and a mini split R410a adapter so you can match common service ports without extra tools.

• Use the 13mm R134a low-side quick coupler for most automotive systems.
• Swap to the 14mm R1234yf coupler if your vehicle uses that refrigerant.
• Employ the R410A mini split adapter for compatible HVAC units.
• Use the included valve-core tool to depress the core and gain access safely.

How much oil or dye can I inject and how precise is the control?

The hand-turn screw injector holds roughly 1 oz (30 ml) and dispenses in small, controlled increments when you twist the handle. Because it’s a manual, single-use-friendly tool, it’s ideal for adding modest amounts of dye or oil for leak detection or topping up a system during service.

• Main body capacity: about 1 oz (30 ml) per fill.
• Push-style dosing gives tactile control—stop when the desired quantity is delivered.
• Not dependent on a running compressor, reducing procedural complexity.
• Designed for limited or one-time exposures; tubing reacts with refrigerant over extended periods.

What materials and adapters are included, and are they durable?

The injector body is machined from aluminum alloy for a lightweight but sturdy shell, while the 1/4" connectors and quick couplers are brass for corrosion resistance and reliable sealing. The kit supplies five pieces to cover the most common service scenarios.

• One 2 oz hand-turn screw-in injector (aluminum alloy body).
• Brass 1/4" SAE compatible connectors and quick couplers for strength.
• Adapters for R134a, R1234yf, and an R410A mini split interface.
• Valve core removal tool included for safe port access.

Are there any safety or reuse considerations I should know?

The kit is intended for controlled, short-duration injection tasks; the tubing and internal seals can react with refrigerants over time, so the manufacturer recommends single-use or limited reuse per operation. Follow all standard safety and refrigerant-handling practices when connecting or depressurizing service ports.

• Do not leave the injector attached for long periods; use briefly to inject dye or oil.
• Replace the tubing after extended exposure—materials may degrade with refrigerant contact.
• Observe refrigerant-specific handling and disposal guidelines.
• Not a substitute for professional evacuating, charging, or repair when needed.

Who is this for: The Tellegloww AC Oil Dye Injector Kit suits HVAC technicians, mobile mechanics, fleet maintenance teams and DIYers who need a compact method to introduce small amounts of oil or fluorescent dye into low-side refrigerant circuits without running the compressor. It’s especially useful for targeted leak-detection tasks and quick service interventions on a variety of refrigerants when controlled, measured dosing is required.