How to Fix Air Compressor Tank Leaks

We research in-depth and provide unbiased reviews and recommendations on the best products. We strive to give you the most accurate information. If you buy something through our links, we may earn a commission.

If you are wondering how to fix air compressor tank leak, you’ve come to the right place. Here’s a step-by-step guide for fixing your tank. Pinholes, rusty outside, and ageing valves are all signs of a leaking air compressor. If none of these signs apply to you, read on! Then, learn how to fix air compressor tank leak – fast!

Pinholes develop

Often when you try to fix an air compressor tank leak, pinholes develop. If you have an air compressor tank that is leaking, these pinholes will continue to form until you find the source of the leak and repair it. Eventually, this leak can become a serious safety hazard and you’ll have to replace the entire tank. You should avoid trying to patch, weld, or braze the leak as this can cause the tank to explode.

First, if you notice rust particles coming out of the tank, it’s time to get a new tank. Besides, fixing pinholes can compromise the compressor’s internal parts. The pinholes are often an indication that there is a larger problem inside the tank. Once you’ve identified the source of the leak, shut down the air compressor and drain the tank to remove the water. If the pinholes persist, you can use an angle grinder to grind the area smooth.

Unloader valves age

If your air compressor isn’t holding any pressure, you might want to learn how to fix air compressor tank leak. The problem could be caused by a welded-on bracket, weakened tank, or loose fittings. To fix a leak, you can use a brazing rod and welding lighter to melt the metal around the leak. Once the area is properly sealed, let the tank cool down. To prevent future leaks, you should test the tank for bubbles.

When air compressors leak, it may be the water trap on the air tank. A faulty valve will cause air to leak out. If you can’t find the source, try tightening the valve. Another cause of air leaks is holes in the tank. If you’ve seen holes in the air compressor tank, then it’s likely the tank is the culprit. To fix an air compressor tank leak, tightening the valve may help.

To test the tank, spray soapy water all over the tank and look for bubbles. If you see bubbles, then you’ve detected a pinhole leak or rust. Once you’ve found the source of the leak, shut down the air compressor by turning off the compressor. Open the valve and bleed out the tank as needed. If the bubbles stop, you’ve fixed the leak. If bubbles appear after cleaning the tank, the problem is likely to be the source of the leak.

Several possible causes of air compressor tank leaks are listed below. Sometimes, the problem is caused by the pressure switch itself, which has a diaphragm inside. Over time, the diaphragm can rust and crack, allowing air to leak. If you can’t locate the valve, you can replace it with a new one. Another common cause of air compressor tank leaks is a damaged check valve. A damaged check valve can lead to a backflow of air into the tank, so it is vital to replace it.

Rust on the outside of the tank

When rust appears on the outside of your air compressor, it may be time to replace it. This corrosive byproduct of air compressors weakens the tank’s integrity, causing small holes and punctures that allow air to escape. When you notice this deterioration, it’s important to replace your air compressor immediately. Don’t attempt to remove the rust with sandpaper or other tools, as this will damage the tank’s integrity.

Read More:   How Wide Is a 2 by 4?

If you’d like to remove rust on the outside of your air compressor, you’ll need to disassemble the tank’s fittings. Once you’ve disassembled it, you can use liquid something to dissolve the rust flakes inside the tank. Once you’ve cleaned the inside of the tank, you can pour the liquid out. To get rid of any residue, you’ll want to run the tank through several times to make sure that it’s clean.

The rust on the outside of your air compressor tank is a sign that the tank is getting too old. Air compressor tanks are susceptible to rusting due to the fact that they are frequently filled with water. The water causes the air compressor tank to become over-pressured and can even explode. The best way to prevent this problem is to maintain your air compressor regularly. But how do you keep rust from destroying your air compressor? Keep reading to learn how.

Identify the source of the rust on your air compressor tank. Rust is usually caused by loose parts or by leaks. To plug the leak, simply turn the tank so that the exit hose opening is at the bottom. Once you’ve found the source of the rust, clean the inside of the tank. This can be a pain. Don’t try to use any rust treatment products if your air compressor tank is too small.


If you have a leak in your air compressor tank, you can repair it by welding the affected part. You will need to use a brazing rod and a welding torch. Ensure the torch’s flame is bright and blue. Place the brazing rod onto the leaking area. Keep the torch in the same position as the metal to make sure the welding rod melts the metal. After welding, allow the tank to cool before using it again.

To fix the leak, you must first find the location where the crack is located and then apply a weld. After the weld has been applied, make sure you apply a water/soap mix to check for pinholes. Then, air up the tank half way. If the weld is not good enough, grind it out to check the weld. Once you’ve done that, turn on the air pressure slowly.

The next step is to determine the exact specifications and type of metal that the air compressor is made out of. Before welding, you should assess the condition of the air compressor. The type of metal and welding process used will depend on the thickness of the air compressor tank’s wall. You should also know the maximum amount of stress a piece of metal can handle. If the tank is made out of a thin metal, then a welding torch will work perfectly.

When you have found the leak in your air compressor, it’s time to fix the weakened seam. You can use a small wrench or an angle grinder to tighten any loose parts. To fix the tank, you’ll need some basic tools to get started. First, you’ll need a wrench. Plumber’s tape is used to seal threads and a torch to heat up the air compressor’s tank.


When an air compressor tank begins to leak, you should immediately find the source and repair the air compressor tank. Pinholes will continue to leak until the tank reaches 100 PSI and becomes a safety hazard. If you do not repair the air compressor tank quickly, you run the risk of an explosion. Patching, welding or brazing will only make the leak bigger. The risk of explosion is too high to use a damaged tank.

Read More:   The Advantages of Using a Drywall Drill

First, disconnect the air compressor. If you can’t disconnect the compressor from the electrical circuit, then disconnect it. Then, turn it off and wait for the compressor to charge completely. Next, use a spray bottle to clean the tank bleed fitting and emergency release valve. If you see bubbles or bubbling, the leak may be due to a loose fitting or weakened tank. Once the tank is clean, you can apply a new coating of Teflon tape.

If the leak is confined to the air tank, you may use a brazing torch to repair the tank. The brazing torch should have a bright blue flame, so you can see where to use it. Afterward, you can use a brass brazing rod to rebuild the welded area and seal the tank. Press the brass brazing rod to the metal until it melts, and hold the torch over the spot to keep the metal in place as it melts. Once the tank is fully repaired, you can use the air compressor.

If you cannot repair the air compressor tank, you may want to try to patch it. This method is more effective than patching, and it will save you a lot of money and time. But, the tank itself might not be safe to weld since it has accumulated moisture from the inside. Moisture can cause the weld to weaken from the inside, and it will also be unstable. A quick patch will save you money and time.

Why trust Handyman.Guide?

s written by Itamar Ben-Dor, who has 25 years of experience in renovations, carpentry, locks, creation, landscaping, painting, furniture construction, and furniture renovation, works with concrete, plumbing, door repair, and more.

Itamar Ben-Dor has been in the home improvement business for over 25 years. Itamar Ben-Dor is a jack of all trades. He's worked in the renovation field for years, doing everything from locksmithing to carpentry. He's a small repairs specialist. But his true passion lies in furniture construction and renovation - he loves seeing old pieces come back to life with some new woodwork or a fresh coat of paint.

He has taken courses on many topics in these fields at professional colleges in Israel. Over the years, Itamar has also become quite skilled in gardening, carpentry, and renovations. He's worked on projects of all sizes, from massive renovations to small repairs. No job is too big or too small for him!

Disclosure: participates in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for publishers to earn fees by linking to and affiliated sites.