--- product_id: 3560127 title: "Mastercool 82375 Oil and Dye Injector for R134a" brand: "mastercool" price: "B/.172" currency: PAB in_stock: true reviews_count: 13 url: https://www.desertcart.com.pa/products/3560127-mastercool-82375-oil-and-dye-injector-for-r134a store_origin: PA region: Panama --- # Precision needle valve control R134a system compatibility with 1/2” ACME fittings 2 oz heavy-duty metal canister Mastercool 82375 Oil and Dye Injector for R134a **Brand:** mastercool **Price:** B/.172 **Availability:** ✅ In Stock ## Summary > 🛠️ Inject with precision, service with confidence — never miss a leak again! ## Quick Answers - **What is this?** Mastercool 82375 Oil and Dye Injector for R134a by mastercool - **How much does it cost?** B/.172 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/3560127-mastercool-82375-oil-and-dye-injector-for-r134a) ## Best For - mastercool enthusiasts ## Why This Product - Trusted mastercool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Heavy-duty all-metal 2 oz canister designed for demanding professional use and repeated service. - • **Precision Control:** Smooth, needle valve delivery ensures exact fluid flow between manifold gauge and A/C hose. - • **Seamless Integration:** Standard 1/2” ACME male x female fittings guarantee hassle-free connection with R134a tools. - • **Dual Injection Mastery:** Inject oil or UV dye via vacuum suction or pressurized refrigerant for ultimate flexibility. - • **Trusted Professional Grade:** Mastercool’s proven reliability and quality empower both DIYers and pros to chase leaks confidently. ## Overview The Mastercool 82375 Oil and Dye Injector is a professional-grade tool engineered for precise injection of refrigerant oil or UV dye into R134a automotive A/C systems. Featuring a durable 2 oz metal canister, dual injection methods (vacuum suction or pressurized refrigerant), and precision needle valve control, it seamlessly integrates with standard 1/2” ACME fittings. Trusted by technicians and DIY enthusiasts alike, this injector delivers reliable, controlled performance to detect leaks and maintain optimal A/C system health. ## 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 | #196,917 in Automotive (See Top 100 in Automotive) #524 in Air Conditioning Line Repair Tools | | Brand | Mastercool | | Customer Reviews | 4.6 4.6 out of 5 stars (374) 4.6 out of 5 stars | | Date First Available | October 2, 2001 | | Exterior | Silver | | Item Model Number | 82375 | | Item Weight | 8 ounces | | Manufacturer | Mastercool | | Manufacturer Part Number | 82375 | | Model | R134a 2 oz Oil/Dye Injector | | Oem Part Number | 82375 | | Product Dimensions | 4.3 x 2.3 x 11.3 inches | ## Images ![Mastercool 82375 Oil and Dye Injector for R134a - Image 1](https://m.media-amazon.com/images/I/51iaTBw8DxL.jpg) ![Mastercool 82375 Oil and Dye Injector for R134a - Image 2](https://m.media-amazon.com/images/I/71+cD7NVWeL.jpg) ![Mastercool 82375 Oil and Dye Injector for R134a - Image 3](https://m.media-amazon.com/images/I/914xwFn9XZL.jpg) ![Mastercool 82375 Oil and Dye Injector for R134a - Image 4](https://m.media-amazon.com/images/I/81Y+2My5nZL.jpg) ![Mastercool 82375 Oil and Dye Injector for R134a - 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 ### ⭐⭐⭐⭐⭐ Easy way to add product to AC system *by on Reviewed in the United States August 13, 2017* Very good quality. The valve works and is also of high quality. The body is machined, the threads are clean. I had no trouble using this item on several auto AC systems this summer. I would recommend it to anyone who needs a way to get oil into their AC system. On one car when I didn't have my gauges with me I just used a can of 134a to push the oil into the system. Worked perfectly that way. ### ⭐⭐⭐⭐⭐ Great Mastercool quality as usual *by on Reviewed in the United States April 8, 2022* Been a pro for years, using Mastercool products. This oil injector does exactly what it's supposed to do, and is high quality. If you're too clumsy to thread a big lid onto a cannister without crossing it up, AND if you don't know what size fittings you need, you probably should leave this stuff to the big boys and stay out from under your hoods. Oafs and clowns. ### ⭐⭐⭐⭐⭐ Terrific Tool that is easy to use. *by on Reviewed in the United States January 30, 2025* Very good tool to own if you're DIY'ing your A/C work. Great way to add dye to the system to chase leaks with. ## 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.com.pa/products/3560127-mastercool-82375-oil-and-dye-injector-for-r134a](https://www.desertcart.com.pa/products/3560127-mastercool-82375-oil-and-dye-injector-for-r134a) --- *Product available on Desertcart Panama* *Store origin: PA* *Last updated: 2026-10-29*