Tellegloww A/C Oil Dye Injector Kit for R134A/R1234yf — Low-Side Adjustable Coupler, UV Light & Backflow Prevent

Tellegloww A/C Oil Dye Injector Kit is a complete low-side solution for introducing oil or fluorescent dye into HVAC and automotive refrigerant systems while helping you locate leaks with a UV lamp and protective eyewear.

This compact kit combines an aluminum-alloy injector, adjustable low-side coupler options, a mini-split adapter, and a handheld UV inspection light so you can add oil or trace dye through the low-pressure suction port and then inspect for leaks safely. Components are built from corrosion-resistant brass and reinforced hose fittings intended for routine shop or DIY service on systems that use R134A, R22, R12, R1234yf and R410A-compatible interfaces.

How do I inject oil or fluorescent dye into an A/C system?

Use the low-side suction method: attach the injector to the system’s low-pressure port using the adjustable R134A or R1234YF coupler, or the R410 mini-split adapter for applicable units. Turn or pull the injector handle to introduce the measured amount of oil or dye and monitor system pressure while working to avoid overfilling.

• Connect the appropriate coupler to the vehicle or HVAC low-side service port.
• Secure the injector hose to the coupler using the 1/4" internal thread fittings.
• Operate the injector handle to dispense the exact volume needed.
• Check system pressures and restart the compressor per manufacturer guidelines.

Will the kit work with my refrigerant type and equipment?

The Tellegloww kit includes adapters and couplers designed to fit common service ports, so it works with systems using R134A, R22, R12, R1234yf and many R410A mini-split fittings via the provided adapter. The hose and couplers accept standard fluorescent dyes and are suited for both automotive and residential/commercial air conditioning units.

• R134A adjustable quick coupler for standard low-side ports.
• R1234YF quick coupler for newer vehicle systems.
• R410 mini-split adapter to reach smaller service ports.
• 1/4" internal thread fittings compatible with common dye syringes.

How does the UV light and glasses help locate leaks?

After adding fluorescent dye, shine the included UV flashlight over suspect components—the dye glows under UV, revealing oil trails and leak paths that are otherwise hard to see. The UV protective glasses filter the light and enhance contrast so you can spot leaks while reducing eye strain from the lamp.

• Handheld UV lamp for visual inspection of dye traces.
• Protective glasses to improve visibility and safeguard eyes from intense UV light.
• Use in shaded or darkened areas for best dye fluorescence.
• Ideal for evaporators, condensers, lines, fittings, and compressor seals.

What materials and durability features are included?

The injector housing and flashlight are crafted from lightweight aluminum alloy for strength and corrosion resistance, while couplers, adapters and reinforced brass joints provide reliable sealing and long service life. The thicker hose and reflow-resistant brass fittings reduce the risk of leaks at connection points under routine shop use.

• Aluminum-alloy injector and flashlight bodies for durability.
• Heavy-duty brass couplers and adapters resist rust and wear.
• Thick hose with reflow-resistant brass joints for secure fittings.
• Designed for repeated use with compatible fluorescent dyes and oils.

Who is this for? Technicians, HVAC hobbyists and vehicle owners who perform routine A/C servicing will find this Tellegloww kit useful for targeted oil top-ups and tracer-dye leak detection without complicated equipment. It suits shops that need portable low-side injection capability and field inspections, as well as DIYers who understand refrigerant safety and follow proper handling and disposal practices.

• Included: 1 A/C oil & dye injector, 1 R134A adjustable coupler, 1 R1234YF coupler, 1 R410 mini-split adapter, 1 UV flashlight (batteries not included), 1 pair UV protective glasses.
• Note: Use with compatible fluorescent dyes and follow refrigerant manufacturer service procedures. Always work in a ventilated area and wear appropriate PPE.