AC Dye Oil Injector Backflow Prevent Kit, HVAC Dye Oil Injector with R134A Snap Quick Coupler, R1234YF Low Side Quick Coupler, R410 Mini Split Adapter for R134A R22 R12 R410 R1234YF Refrigerant System

Original price was: $40.99.Current price is: $38.99.

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  • 【AC Oil Dye Injector】Professional automotive air conditioner compressor A/C dye oil injector with capacity 1/4 oz/7.5ml—2oz/60ml, for injecting oil and dye through low pressure suction side into the air conditioner compressor, the 1/4 SAE port with backflow protection.
  • 【Refrigerant Adapters】R134A low side quick coupler with 1/4’’ SAE male x 13mm female, Blue Low side R1234yf coupler with 14 mm female x 1/4″SAE male, R410a mini split adapter with 5/16’’ SAE Female to 1/4’’ SAE Male.
  • 【Application】 AC dye injector kit with R134A and R1234YF low side port quick coupler, R410a refrigerant hose adapter, compatible with fluorescent dyes for leak monitoring, all oil types(POE, or mineral oil) and all home office AC and car AC systems.
  • 【How To Use】Oil cylinder of refrigerant oil injector is filled with 2 ounces of refrigeration oil, check valve screwed onto cartridge and tightened. The inner and outer cylinders are tightened clockwise, and then a little 1/4 SAE threaded inner core is used to discharge a little air inside the blue tube. Connect the low-pressure port of the refrigeration system that needs to be refueled, and add the required amount of cooling oil to the inner and outer cylinders.
  • 【Guarantee】The 12 months free worry is guaranteed, If any question when you buy or use our AC oil dye injector tool, please feel free to contact us, our customer service will reply you within 24 hours.

Delivery service is available for All cities of North America, Europe and Japan. Delivery time will 3-14 working days depend on courier service. Please check the lead time before placing order if you are in other regions.

If your product is damaged, defective, or incorrect at the time of delivery, please contact us within 7 days. Items can be returned within 7 days of delivery i.e. if an item was delivered on 1st December, it can be returned till 8th December. All items must be returned is in original form (unused, unworn, original packaging, seals, and tags attached), along with all the accessories, manuals, and warranty card that came with it. All items sent for return first go through quality check to ensure they are returned in the original condition. If a product is returned to us in an inadequate condition, we reserve the right to send it back to you.




  • Ideal for Car Home Office AC and Car AC systems, it’s a professional service tool.
  • Using Aluminum alloy, with 1/4″ female connector, make it compatible with most AC systems (if not, use CV23p for some 5/16″ R410a systems).
  • Once shot may cure and save a sickened compressor caused by low oil.
  • Compatible with fluorescent dyes for leak monitoring, compatible with all oil types (POE, or mineral oil) Compatible with all refrigerant types.


  • Bulit in hose with no leak coupler seal for safe connection.
  • Material: aluminum alloy body + brass connector
  • R134A Working Pressure: 3000 PSI
  • Burst Pressure: 600 PSI

How do you use AC oil injectors?

  1. Before adding any additive to the injector, the shut off valve must be off. Uscrew the end off the injector.
  2. Put in the desired amount of additive.
  3. Screw the end back on the injector.
  4. Connect R134A R12 F22 coupler to the injector.
  5. Connect other end of the injector to the low side service port on the vehicle.
  6. Open the valve on the injector.
  7. With refrigerant attached, fill to proper pressure.
  8. When finished using the injector toool, clean well by using brake cleaner.


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