Boltigen R1234yf Dye Injector for R1234yf/R134a — Shut-off Valve, Adjustable Quick Couplers, Aluminum Body

Boltigen R1234yf Dye Injector is a compact, professional-grade AC oil and dye injector with a shut-off valve and adjustable quick couplers for both R1234yf and R134a systems.

This injector kit is built for technicians and DIYers who need a precise, mess-minimizing way to add oil or UV dye to automotive air conditioning systems. Hand-finished aluminum construction, etched volume markings, and a user-friendly shut-off valve simplify topping up compressor oil or introducing trace dye. The kit also includes adjustable quick couplers and accessories to support safe connection and repeated use.

How does the shut-off valve improve the oil injection process?

The integrated shut-off valve gives you control over flow so you can start and stop injection without disconnecting hoses or wasting fluid. That reduces spills, improves measurement accuracy, and protects the system from overfill.

• Quickly stop flow when the correct volume is reached
• Prevents drips during coupling and uncoupling
• Enables stepwise injection for precise topping-up

Can this injector work with both R1234yf and R134a systems?

Yes — the kit includes adjustable quick couplers that adapt to service ports for R1234yf and R134a refrigerants. Those couplers make the tool versatile across modern vehicles and older models without needing separate adapters.

• Adjustable couplers fit common service port sizes
• Brass construction resists wear from repeated use
• One tool covers both refrigerant types for convenience

What features make this injector durable and accurate?

The main body is precision-machined from aluminum and the cylinder features etched volume markings that won’t fade. A reinforced hose and brass quick couplers deliver a long service life, while the shut-off valve and clear markings support repeatable, accurate fills.

• Aluminum body for strength and light weight
• Etched measurement marks (1/4 oz to 2 oz / 7.5–60 ml)
• Durable rubber hose and brass couplers reduce leaks and wear

How easy is it to use this injector kit for a routine service?

Operation is straightforward: rotate the cylinder open, pour in the desired oil or dye, secure the cap, run the A/C, attach the coupler, and rotate to inject. The included accessories and clear markings reduce guesswork, making the process faster and cleaner for pros and hobbyists.

• Stepwise instructions: fill, cap, connect, then inject
• Includes two oil checkers and a valve core remover for common tasks
• Supplied gloves and storage bag keep components clean between uses

Who is this for: Boltigen’s R1234yf Dye Injector kit suits automotive technicians, fleet mechanics, and knowledgeable DIYers who service HVAC systems and want a compact, accurate tool for adding oil or UV dyes. If you need compatibility with both R1234yf and R134a systems, etched volume control, and a shut-off valve to prevent messes, this kit offers a balanced mix of durability, precision, and useful accessories for routine maintenance and leak-detection prep.