Boltigen AC Oil Injector Kit for R1234yf R134a R410a — Aluminium Dye Injector with Shut-Off & Backflow Prevention

Boltigen AC Oil Injector Kit is a compact, multi-adapter tool that lets technicians and DIYers add oil or fluorescent dye to R1234yf, R134a and R410a air conditioning systems safely and cleanly.

This all-in-one injector set includes the main aluminum alloy injector body, low-side couplers for R1234yf and R134a, an R410a adapter, valve-core remover, gloves and protective bag. Designed for service work on automotive and small HVAC systems, the kit supports POE and mineral oils plus fluorescent dyes for leak detection while providing backflow prevention and a shut-off valve for controlled dispensing.

How does the injector prevent backflow and overfill?

The Boltigen injector uses an integrated check valve and a manual shut-off to stop refrigerant or oil from returning into the container once connected. That reduces contamination and accidental overfills during charging or dye injection. The shut-off also lets you meter small, precise doses without pressure spikes.

• Built-in check valve for one-way flow
• Manual shut-off for controlled dispensing
• 1/4" SAE brass connector ensures secure, leak-resistant seating

Which refrigerants and oils are compatible with this kit?

This injector is made to work with modern automotive refrigerants R1234yf and R134a and includes an adapter for R410a systems. It accepts common compressor oils such as POE and mineral oils, and is suitable for fluorescent leak dyes used in troubleshooting.

• R1234yf and R134a quick-couplers included
• R410a adapter for broader HVAC compatibility
• Supports POE, mineral oils and fluorescent dyes

What materials and build quality can I expect?

The injector body is machined from aluminum alloy for durability with a brass 1/4" SAE connector to withstand repeated service operations. The reinforced rubber hose and anodized finish resist wear and chemical exposure so the kit remains reliable over many uses.

• Aluminum alloy hand-turn body for lightweight strength
• Brass threaded connector for corrosion resistance
• Thick rubber hose and protective flannelette bag included

How do I use the Boltigen oil and dye injector safely?

Fill the injector cylinder with the recommended oil or dye amount (typically up to 2 ounces), attach the check valve and tighten the inner/outer cylinders to purge air. Connect the low-side coupler to the vehicle or system low port, open the shut-off and dispense the measured amount while monitoring system pressure.

• Fill inner cylinder up to recommended volume (about 2 oz)
• Use valve-core remover and couplers to access low-side port
• Wear supplied gloves and stow kit in the included bag after use

Who is this for: The Boltigen AC Oil Injector Kit is aimed at automotive technicians, HVAC service professionals and knowledgeable DIYers who need a portable, adaptable tool to add oil or fluorescent dye into R1234yf, R134a or R410a systems. If you perform routine AC servicing, leak tracing, or oil top-ups and want a compact kit with backflow prevention and accurate dosing, this tool provides a practical, durable solution.