--- product_id: 3560127 title: "Mastercool 82375 Standard Oil and Dye Injector for R134a A/C Systems – 2 oz Heavy-Duty Canister – 1/2” Acme-M x 1/2” Acme-F Fittings – Needle Valve Control" price: "$117.39" currency: USD in_stock: true reviews_count: 13 url: https://www.desertcart.us/products/3560127-mastercool-82375-standard-oil-and-dye-injector-for-r134a-c store_origin: US region: United States of America --- # 1/2” ACME male x female fittings Precision needle valve control 2 oz heavy-duty metal canister Mastercool 82375 Standard Oil and Dye Injector for R134a A/C Systems – 2 oz Heavy-Duty Canister – 1/2” Acme-M x 1/2” Acme-F Fittings – Needle Valve Control **Price:** $117.39 **Availability:** ✅ In Stock ## Summary > 🔧 Inject with precision, service with confidence. ## Quick Answers - **What is this?** Mastercool 82375 Standard Oil and Dye Injector for R134a A/C Systems – 2 oz Heavy-Duty Canister – 1/2” Acme-M x 1/2” Acme-F Fittings – Needle Valve Control - **How much does it cost?** $117.39 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/3560127-mastercool-82375-standard-oil-and-dye-injector-for-r134a-c) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Rugged all-metal 2 oz canister engineered for repeated, heavy-duty professional use without fail. - • **Dual Injection Mastery:** Seamlessly inject oil or UV dye via vacuum suction or pressurized refrigerant for ultimate A/C system care. - • **Precision Flow Control:** Needle valve ensures smooth, exact fluid delivery—no spills, no guesswork, just perfect dosing every time. - • **Plug & Play Compatibility:** Standard 1/2” ACME fittings guarantee effortless integration with your existing R134a service tools. - • **Leak Detection Game-Changer:** High-volume UV dye injection makes pinpointing leaks faster and more reliable—stay ahead of costly repairs. ## Overview The 82375 Standard Oil and Dye Injector by Mastercool is a professional-grade tool designed for R134a automotive A/C systems. Featuring a durable 2 oz metal canister, precision needle valve control, and standard 1/2” ACME fittings, it enables dual-method injection of refrigerant oil or UV dye for efficient leak detection and system maintenance. ## Description Mastercool 82375 Standard Oil and Dye Injector for R134a Systems The Mastercool 82375 is a durable and easy-to-use tool for injecting refrigerant oil or UV dye into R134a automotive A/C systems. With its heavy-duty 2 oz metal canister and precise needle valve, this injector offers flexible operation using either system vacuum or refrigerant pressure. Technicians can add oil after evacuation by drawing it in through vacuum suction or inject it during the recharging process using system pressure. The built-in needle-style valve provides smooth, accurate control, and the tool connects easily between a manifold gauge set and charging hose using standard 1/2” ACME-M x 1/2” ACME-F fittings. Whether you're servicing a vehicle or performing routine maintenance, the 82375 is built to deliver reliable, controlled results — backed by Mastercool’s trusted support. ## Features - ✔️ Injects Refrigerant Oil or UV Dye – Designed to deliver oil or high volumes of UV leak detection dye into R134a automotive A/C systems. - ✔️ Dual Injection Methods – Add fluid using vacuum suction after system evacuation or pressurized refrigerant during recharge. - ✔️ Heavy-Duty 2 oz Metal Canister – Durable all-metal construction built to withstand repeated use in demanding service environments. - ✔️ Precision Needle Valve Control – Built-in valve provides smooth, controlled delivery when used between your manifold gauge set and A/C hose. - ✔️ R134a System Compatibility – Equipped with 1/2” ACME male x female fittings for seamless integration with standard R134a service tools. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000IKADRW | | Best Sellers Rank | #157,763 in Automotive ( See Top 100 in Automotive ) #555 in Air Conditioning Line Repair Tools | | Brand | Mastercool | | Customer Reviews | 4.6 4.6 out of 5 stars (372) | | Date First Available | October 2, 2001 | | Exterior | Silver | | Is Discontinued By Manufacturer | No | | Item Weight | 8 ounces | | Item model number | 82375 | | Manufacturer | Mastercool | | Manufacturer Part Number | 82375 | | Model | R134a 2 oz Oil/Dye Injector | | Product Dimensions | 4.3 x 2.3 x 11.3 inches | ## Images ![Mastercool 82375 Standard Oil and Dye Injector for R134a A/C Systems – 2 oz Heavy-Duty Canister – 1/2” Acme-M x 1/2” Acme-F Fittings – Needle Valve Control - Image 1](https://m.media-amazon.com/images/I/51iaTBw8DxL.jpg) ![Mastercool 82375 Standard Oil and Dye Injector for R134a A/C Systems – 2 oz Heavy-Duty Canister – 1/2” Acme-M x 1/2” Acme-F Fittings – Needle Valve Control - Image 2](https://m.media-amazon.com/images/I/71+cD7NVWeL.jpg) ![Mastercool 82375 Standard Oil and Dye Injector for R134a A/C Systems – 2 oz Heavy-Duty Canister – 1/2” Acme-M x 1/2” Acme-F Fittings – Needle Valve Control - Image 3](https://m.media-amazon.com/images/I/914xwFn9XZL.jpg) ![Mastercool 82375 Standard Oil and Dye Injector for R134a A/C Systems – 2 oz Heavy-Duty Canister – 1/2” Acme-M x 1/2” Acme-F Fittings – Needle Valve Control - Image 4](https://m.media-amazon.com/images/I/81Y+2My5nZL.jpg) ![Mastercool 82375 Standard Oil and Dye Injector for R134a A/C Systems – 2 oz Heavy-Duty Canister – 1/2” Acme-M x 1/2” Acme-F Fittings – Needle Valve Control - Image 5](https://m.media-amazon.com/images/I/81Hkjl+RfVL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Wouldn't this product allow air to enter the system when pushing it in w/ refrigerant? Vacuuming seems like it wouldn't b/c air would be vacuumed out.** A: If you install this oil injector in-line with the low side hose on your gauge set/manifold, you can pull vacuum on the hoses (remove air & moisture). Then, close off your valve to vacuum. Next, open up valve to your refrigerant tank, and charge the hoses with refrigerant. Finally, open the valve on the oil injector to allow the refrigerant from your gauge set/manifold to push the oil into the vehicle's A/C low side port. I do use a CPS MV5H3D 5-valve manifold (hi & low side hoses, refrigerant hose, vacuum hose, vacrometer all on one manifold) to limit the amount of things I have to assemble to do this (i.e., it's already set up, just connect hoses). **Q: If you continue to run the pump, wouldn’t that pull the oil right back out?** A: I'm not sure what you're asking, but this device allows you to add the proper type and quantity of oil to you HVAC system. That oil doesn't just sit there in the compressor, it disperses throughout the refrigerant, thereby lubricating the system. Honestly, my only concern with adding oil by this method is that it might dump too much oil too fast into the compressor and hydrolock the compressor. Hasn't ever happened, and I've used this thing dozens of times now on different units. Just make sure you're using the right oil and the right quantity. Since you can never be sure how much/type oil is in a system you're topping off, I vacuum pump the system down and then add the oil. Too much oil is as bad as too little. My actual steps are; recover/remove the old 134A....fix the leak......pump down the system...add I can 134A....add oil....add 134A until the gauges read correctly for the ambient air temperature. BTW; you will know you fixed the leak when the pump holds vacuum for 30 minutes (turned off). **Q: Can this be used as a nu calgon flush kit?** A: Dimitri, we're an auto repair shop and we sometimes use this for injection of oil/dye to the Auto A/C System through the low side port. Other times we use the automatic A/C equipment. It's just a small metal container of very good quality with the proper connecting fittings at each end. I'm not sure what exactly is the nu calgon flush kit but we use a larger container which holds more ounces for flushing Automotive A/C system. **Q: does this injector have 1/4" flare fittings or does it have 1/2" acne fittings?** A: The connector with the turning knob valve is 1/2" (which is outlet)the other end connector is 1/4",which is inlet from manifold gauges. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***L on January 30, 2025* ### ⭐⭐⭐⭐⭐ Review *by W***E on August 13, 2017* ### ⭐⭐⭐⭐⭐ Review *by C***3 on April 28, 2014* ## Frequently Bought Together - Mastercool 82375 R134A Oil Injector, Silver - Mastercool 98210-BL Electronic Refrigerant Charging Scale with Bluetooth® – 243 lbs Capacity, Rugged Platform, Backlit LCD, and Free App - Mastercool 69110 Automotive A/C Recovery System – SAE J2810 Certified, 30 lb DOT Tank, 1/2 HP Oil-Less Compressor, Automatic Shut-Off, Compatible with R134a, R12, R22, R410A --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.us/products/3560127-mastercool-82375-standard-oil-and-dye-injector-for-r134a-c](https://www.desertcart.us/products/3560127-mastercool-82375-standard-oil-and-dye-injector-for-r134a-c) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-05-19*