Can You Use Compression Fittings on Brake Lines?

Brake lines are an important part of your vehicle’s braking system. They carry brake fluid from the master cylinder to the brakes at each wheel. Over time, brake lines can become corroded or damaged, which can lead to leaks.

If you have a leak in your brake line, you may be able to repair it with a compression fitting. Compression fittings are commonly used in plumbing and electrical applications, but they can also be used to repair leaks in brake lines. To use a compression fitting, you will need to cut the damaged section out of the brake line and then insert the compression fitting into the end of the line.

Brake line compression fittings are available at most auto parts stores.

  • Cut the brake line using a tubing cutter or saw, making sure to leave enough room to attach the compression fitting
  • Deburr the cut end of the brake line using a deburring tool or file
  • Slide the compression nut and sleeve over the end of the brake line
  • Insert the brake line into the compression fitting body until it bottoms out
  • Tighten the compression nut with a wrench until it is snug against the sleeve, then give it an extra 1/4 turn with a second wrench to ensure proper sealing

Connecting brake lines with a compression fitting

How Much Pressure Can a Compression Fitting Hold?

Compression fittings are commonly used in plumbing and they work by using a nut and a ferrule (or an O-ring) to compress the tubing against the fitting. This creates a seal that is resistant to both leaks and pressure. So, how much pressure can a compression fitting hold?

The answer depends on the specific compression fitting as well as the type and thickness of the tubing being used. That said, most compression fittings can handle pressures up to about 400 psi. And while this is generally more than enough for most home plumbing applications, it’s always best to check with the manufacturer before using a compression fitting in any high-pressure situation.

Are Compression Fittings Safe?

Compression fittings are widely considered to be safe for a number of reasons. First, they create a very tight seal that is not easily breached. This means that there is little chance of leaks, which could cause serious damage or even be dangerous.

Second, compression fittings are easy to install and remove, so you can make repairs quickly if something does go wrong. Finally, these fittings are made from durable materials that can withstand high levels of pressure and temperature change without breaking down.

Can I Use a Single Flare on Brake Lines?

No, you cannot use a single flare on brake lines. A double flare is required for proper sealing and compatibility with brake fluid.

Where Can Compression Fittings Be Used?

Compression fittings are most commonly used in plumbing applications to connect two pieces of pipe or tubing together. They can also be used to repair a leaky pipe by simply tightening the nut over the leaky area. Compression fittings are available in a variety of sizes and materials, so you can find one that is compatible with your pipes.

Dot Approved Brake Line Compression Fittings

Dot Approved Brake Line Compression Fittings There are many different types of brake line fittings on the market, but not all of them are created equal. When it comes to safety and reliability, you can’t go wrong with DOT-approved brake line compression fittings.

These fittings are designed to meet the strictest safety standards, so you can rest assured that your brakes will work properly in any situation. DOT-approved brake line compression fittings are made from high-quality materials that can withstand extreme temperatures and pressures. They’re also corrosion-resistant, so they’ll last for years without any problems.

Best of all, they’re easy to install – even if you’re not a professional mechanic. If you’re looking for the best possible brake line fittings for your vehicle, make sure to choose DOT-approved compression fittings. With these fittings, you’ll enjoy peace of mind knowing that your brakes will always be up to the task when you need them most.


Compression fittings are commonly used in plumbing, but can you use them on brake lines? The short answer is no. Compression fittings rely on a seal being compressed between the fitting and the pipe, but brake lines are under too much pressure for this type of connection to be reliable.

If you’re looking to connect brake lines, flare fittings are a better option.

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