Oil and Coolant Filling Tool

Precise Manual Oil & UV Dye Injector for AC Systems
Designed for adding compressor oil or UV leak detection dye during automotive and HVAC AC system maintenance. Helps simplify servicing and troubleshooting of air conditioning systems.


Clear 30ml Capacity Cylinder
The transparent ABS syringe body features clear volume markings up to 30ml (1 oz), letting you monitor and control fluid injection precisely to avoid overfilling.

Quick & Secure Coupling System
Equipped with a low-pressure quick coupler and 1/4" SAE brass connectors to ensure reliable coupling and zero-leak operations during high-pressure servicing.

Easy Threaded Manual Operation
Designed with a curved double-wing handle and threaded metal rod, this injector allows you to smoothly press fluids into pressurized AC systems by simple manual rotation.
Complete Maintenance Package
- 1 × 30ml (1 oz) Oil & Dye Injector
- 1 × Blue Flexible Hose
- 1 × Quick Coupler

Product Specifications
| 30ml (1 oz) |
| 1/4 inch SAE Male |
| 1/4 inch SAE Female Thread on both ends |
| Low-Pressure Connection |
| POE or Mineral Oils |
| Fluorescent dyes used for leak monitoring |
| Compatible with all refrigerant types |
| Durable ABS, Copper/Brass, and Rubber |
Frequently Asked Questions
🔧 What types of oils and dyes can I use with this injector?
You can use it with POE or mineral compressor oils, as well as fluorescent UV leak detection dyes. It is compatible with all refrigerant types.
🔧 How do I connect this injector to my car's AC system?
Assemble the transparent injector, blue flexible hose, and the 13mm low-pressure quick coupler. Then, insert the quick coupler directly onto the low-pressure service port of your vehicle's air conditioning system.
🔧 Does this injector require tools to operate or connect?
No tools are required. The quick coupler features a push-to-lock sleeve, and the connections use hand-tightened threaded brass fittings for a sealed, secure setup.