Boltigen AC Oil Dye Injector for R1234YF/R134A — Mini Shut-Off Valve, 7.5–60ml

Boltigen’s R1234YF/R134A AC Oil Dye Injector is a compact low-side injection kit that lets you safely introduce oil or fluorescent dye into vehicle and small HVAC systems with precise control.

This injector kit is built to work across modern refrigerant services, including both R1234YF and R134A systems, and is designed for technicians and DIYers who need a reliable method to add POE or mineral oil and to trace leaks using fluorescent dye. The kit pairs a rugged aluminum body and brass SAE connector with a mini shut-off ball valve and two low-side quick couplers so you can hook up quickly and inject controlled volumes without system-disassembly.

How do I use the Boltigen injector safely and accurately?

Connect the included low-side quick coupler to the service port, attach the injector, and use the knurled rotary handle to meter oil or dye into the suction side. The mini shut-off ball valve allows you to stop flow instantly and reduces loss of refrigerant during attachment or removal.

• Attach r1234yf or r134a low-side coupler included in kit.
• Open valve, rotate handle to push the desired dose.
• Close mini shut-off ball valve before disconnecting.
• Use fluorescent dye compatible with system oil (POE/mineral).

Which refrigerants and oils are compatible with this injector?

The Boltigen injector is compatible with systems using R1234YF and R134A refrigerants and is suitable for injecting POE and mineral oils as well as fluorescent dyes formulated for auto and small commercial AC systems. Compatibility makes it a flexible tool for mixed-fleet shops and technicians transitioning between refrigerant types.

• Works with R1234YF and R134A low-side service ports.
• Accepts POE and mineral oils commonly used in compressors.
• Designed for fluorescent UV dyes used in leak detection.
• Useful across car AC and small home/office systems.

How much fluid can I inject and how is dosing controlled?

The hand-turn injector body offers graduated capacity from about 1/4 oz (7.5 ml) up to 2 oz (60 ml), letting you measure small top-ups or larger oil additions without estimating. The rotary push-style mechanism combined with the knurled handle gives tactile feedback for gradual, precise dosing.

• Main body capacity: 7.5 ml to 60 ml (approx. 1/4 oz–2 oz).
• Rotary push design for incremental, controllable injections.
• Knurled handle for secure grip even with gloves.
• Clear dosing range suitable for most service tasks.

What materials and build quality should I expect from the kit?

Boltigen manufactured the injector with durability in mind: an aluminum alloy hand body, brass 1/4" SAE connector, and a thickened rubber hose for resilient connections under service conditions. These higher-quality components extend tool life and help ensure leak-free attachments and repeatable performance.

• Aluminum alloy main body for strength and light weight.
• Brass 1/4" SAE connector for corrosion resistance and secure fit.
• Durable rubber hose to resist kinks and cracking.
• Mini ball valve to quickly isolate the injector.

Who is this for? Technicians, independent mechanics, and capable DIY enthusiasts who work on automotive air conditioning or small HVAC units and need a dependable, low-side method for adding oil or fluorescent dye will find this Boltigen injector especially useful. It’s intended for those comfortable working with refrigerant service ports and who want precise dosing, quick coupler convenience, and a compact, durable tool to include in service kits.