Boltigen AC Oil & Dye Injector Kit, 2 oz — Backflow-Protected with R134a/R1234YF Quick Couplers

Boltigen AC Oil Dye Injector Kit is a compact, 2 oz refrigerant oil and dye injection system with backflow protection and multiple quick coupler adapters for R134a, R1234YF and R410 installations.

This kit gives technicians and DIYers a precise way to introduce oil or fluorescent dye into the low‑pressure side of automotive and small HVAC systems. It combines a sealed injection cylinder with quick couplers for common refrigerants and a mini‑split adapter so you can add tracer dye or top up POE/mineral oil without contaminating the system or wasting product. The built‑in backflow prevention and threaded cores help protect your injector and the service lines during transfer.

How do I use the injector safely on my car or home AC?

Set up by filling the injector cylinder with the required volume (up to 2 oz / 60 ml), attach the check valve, purge a small amount of air, then connect to the system’s low‑pressure service port. Operate with the engine/climate system off or as recommended for the specific service procedure and follow dye manufacturer instructions. The included quick couplers make secure, leak‑resistant connections to R134a or R1234YF low‑side ports.

• Fill inner cylinder with oil or dye up to 2 oz (60 ml).
• Attach check valve and tighten the inner and outer cylinders clockwise.
• Purge a bit of air through the 1/4" SAE core before connection.
• Connect matching quick coupler (R134a or R1234YF) to the low side port.

Which refrigerant systems and oils are compatible with this kit?

The injector supports automotive and small HVAC systems using R134a, R1234YF and R410A (via adapter) refrigerants, and accepts POE and mineral oils as well as fluorescent tracer dyes formulated for leak detection. It’s intended for low‑side suction port service only and is compatible with handheld leak inspection workflows. Avoid cross‑contamination by flushing or dedicating dyes to specific systems.

• R134a quick coupler: 1/4" SAE male x 13mm female.
• R1234YF quick coupler: 14mm female adapter included.
• R410A mini‑split adapter: 5/16" SAE female to 1/4" SAE male.
• Works with POE, mineral oils and compatible fluorescent dyes.

What safety or performance features protect the system and injector?

The design includes a backflow check valve on the 1/4" SAE port to prevent refrigerant or oil from flowing back into the injector, reducing contamination risk. Threaded inner and outer cylinders create a secure seal to control dispensing, while the small purge step clears trapped air for accurate dosing. Quick couplers lock in place to minimize leaks during attachment and service.

• Integrated check valve prevents backflow into the injector.
• Threaded cylinders allow controlled, measurable dispensing.
• Purge procedure reduces air pockets for accurate injection.
• Positive‑lock quick couplers limit loss during connection.

What comes in the box and what extra items might I need?

The Boltigen kit ships with the 2 oz (60 ml) oil and dye injector, R1234YF low‑side coupler, R134a low‑side coupler with valve, R410 mini‑split adapter, and a valve core remover. For complete service you'll also want safety goggles, gloves, approved fluorescent dye, and refrigerant recovery/handling equipment if you’re performing broader repairs. Use manufacturer‑specified dyes and oils to avoid performance or warranty issues.

• 1 × 2 oz oil/dye injector with backflow protection.
• 1 × R1234YF low‑side quick coupler.
• 1 × R134a low‑side quick coupler (with valve).
• 1 × R410 mini‑split adapter and 1 × valve core remover.

Who is this for: The Boltigen AC Oil Dye Injector Kit is aimed at automotive technicians, HVAC service pros, and experienced DIYers who need a compact, adaptable tool for introducing oil or fluorescent dye into low‑pressure refrigerant systems. It’s best suited to routine leak tracing, small top‑ups, and diagnostic work on cars, light trucks, window units, and mini‑split systems when used alongside proper safety and refrigerant handling practices.