Best Engine Radiator Drain Cocks of 2025

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.
Engine radiator drain cocks are essential components of a vehicle's cooling system. These small valves are typically located at the bottom of the radiator and allow for easy draining of coolant when performing maintenance or repairs. Engine radiator drain cocks come in a variety of sizes and materials to fit different makes and models of vehicles. They are durable and reliable, making them a cost-effective solution for maintaining a vehicle's cooling system. Properly maintaining a vehicle's cooling system can help prevent overheating and extend the life of the engine.
At a Glance: Our Top Picks
Top 10 Engine Radiator Drain Cocks
Dorman 61134 Radiator Drain Cocks
The Dorman 61134 Radiator Drain Cocks is a direct replacement that fits perfectly and functions like the original equipment part. It is made of high-quality materials that ensure long service life and offers original equipment quality at a competitive price. The petcock has undergone virtual testing to assure proper fit and function. To ensure a perfect fit, the user needs to input their vehicle's make, model, and trim level into the garage tool.
Dorman Radiator Drain Cocks
The Dorman 61137 Radiator Drain Cocks is a direct replacement for your original part, featuring durable construction that assures a long service life. It is a cost-effective solution that offers original equipment quality at a competitive price. The petcock has undergone virtual testing to ensure proper function and fit. To make sure it fits your exact vehicle, use the garage tool and input your make, model, and trim level.
Dorman 61127 Radiator Drain Petcock
The Dorman 61127 Radiator Drain Petcock is a direct replacement for your original equipment part, ensuring proper fit and function. It is made of durable materials for a long service life and is quality assured through virtual testing. Additionally, it can save you money by offering original equipment quality at a competitive price. To ensure fit, input your make, model, and trim level into the garage tool.
Dorman 61105 Brass Drain Cock
The Dorman Drain Cock is a valuable addition to your automotive toolkit. Measuring 5.05 inches in length and weighing only 0.5 pounds, it is compact and easy to handle. This product falls under the category of engine radiator drain cocks, making it essential for effective coolant management. Manufactured in China, it offers reliable performance for various automotive fittings. With the Dorman Drain Cock, you can ensure efficient draining of your radiator, which is crucial for maintenance and repairs. This convenience helps you keep your vehicle running smoothly by preventing potential overheating issues.
COOLINGBEST Brass Radiator Drain Cock
The COOLINGBEST Drain Cock is designed for use with aluminum radiators, making it a versatile choice for your vehicle. With its durable brass construction, you can trust it to withstand harsh conditions and provide long-lasting performance. Installation is quick and straightforward, allowing you to get back on the road without hassle. The NPT 1/4-18 threading ensures a secure fit, preventing leaks and ensuring optimal coolant drainage. However, it's recommended to have a professional installer handle the setup, as no instructions are included. If you have any questions or concerns, customer support is available to assist you.
Dorman 61106 Drain Cock
Introducing the Dorman Drain Cock, a reliable radiator petcock replacement designed to match your vehicle seamlessly. Its durable construction ensures a long service life, saving you money with its competitive pricing. Quality assurance through virtual testing guarantees proper fit and function. By using the garage tool feature, you can ensure this part fits your specific vehicle model, making installation a breeze.
X AUTOHAUX Radiator Drain Plug
The X AUTOHAUX Drain Plug is designed for various Chrysler and Dodge models, ensuring a perfect fit for your vehicle. Made from high-quality plastic, this drain plug is both sturdy and durable, providing a reliable solution for your radiator needs. It serves to securely attach your radiator, enhancing stability during operation. With its original size and exact match, you can easily replace your old plug without any hassle. Just remember to check your vehicle's model and OE number for compatibility before purchasing.
Dorman Radiator Drain Cock
The Dorman Drain Cock is a vital auto part designed specifically for select Ford and Mercury models. With compact dimensions of approximately 13.7 cm in length, 3.6 cm in width, and 2.3 cm in height, it fits seamlessly into your vehicle's radiator system. This single-package product ensures you have everything you need for installation. Originating from Taiwan, it reflects quality and reliability. By using this drain cock, you can easily manage coolant levels, making maintenance simpler and more efficient, ultimately extending the life of your vehicle's engine.
Dorman 61104 Drain Cock for Jeep Models
The Dorman 61104 Drain Cock is a durable and affordable replacement for your Jeep's radiator drain petcock. Made of quality materials, this part will serve you for a long time. It offers original equipment quality and has undergone virtual testing to ensure proper fit and function. To ensure fit, you can input your make, model, and trim level into the garage tool.
Milton S-614-2 Compressor Tank Drain Cock
The Milton Drain Cock is an essential replacement for damaged drain cocks found on compressor tanks. You can easily turn the handle to drain excess water, ensuring your compressor operates efficiently. Once the water is drained, simply close the drain cock to prevent any leaks. This drain cock features a 1/8" male national pipe thread, making it compatible with most compressor setups. Proudly made in the USA, this product reflects Milton's long-standing commitment to quality air accessories since 1943, serving various markets including automotive and industrial sectors.
Frequently Asked Questions (FAQs)
1. Do you need a drain valve on a radiator?
While there is no requirement to have a drain valve on radiators, it is generally recommended to install drain off points on every radiator. This allows for easier maintenance and draining of the system.
2. What are the three types of radiator valves?
There are three main types of radiator valves based on their functionality: Smart valves, Thermostatic valves, and Manual valves. Each type operates differently and offers various features and benefits.
3. What are the different types of drain valves?
Drain valves come in various types, including pneumatic, electric, thermostatic, and manual handles or wheels. The choice of valve technology depends on the specific application and media to prevent failure or clogging.
4. Where must a drain valve be installed?
A drain-off valve should be installed immediately above the internal stop valve. It is the responsibility of the property owner to ensure proper installation. The communication and supply pipes together form the building water service.
5. Where should a drain off valve be installed?
The drain-off valve is typically located on the lowest point of the radiator or pipework. Look for the radiator in your home with the drain-off valve, which is usually close to the ground floor radiators.
6. Can you replace a petcock?
Yes, it is possible to replace a petcock. However, you may also try cleaning the existing petcock and reinstalling it if it is in good condition.
During our engine radiator drain cock research, we found 24 engine radiator drain cock products and shortlisted 10 quality products. We collected and analyzed 6,031 customer reviews through our big data system to write the engine radiator drain cocks list. We found that most customers choose engine radiator drain cocks with an average price of $5.65.
The engine radiator drain cocks are available for purchase. We have researched hundreds of brands and picked the top brands of engine radiator drain cocks, including Dorman, COOLINGBEST, X AUTOHAUX, Milton. The seller of top 1 product has received honest feedback from 385 consumers with an average rating of 4.7.

Robert Reyes is a dedicated writer from San Francisco with a bachelor of degree in mechanics and a bachelor of degree in marketing. He focuses on making some complicated topics simple and enjoys explaining complex and technical things in an easy-to-understand way.