How to Fix a Leaking Brass Ball Valve

A leaking brass ball valve can be annoying, waste water, and even cause damage if left unchecked. But don’t worry—it’s something you can fix yourself with a little effort and the right tools. Here’s a step-by-step guide to help you handle this issue like a pro.

Start by identifying the source of the leak. There are usually three common places where a brass ball valve might leak:

1. Around the handle (the valve stem): This is often caused by a loose or worn packing nut.
2. Where the valve body joins: The seal between the two halves of the valve might be damaged or loose.
3. Inside the valve (internal leak): This happens when the ball or seals are worn out.

Before diving into the repair, get everything you need:

• An adjustable wrench or spanner
• Screwdrivers (flathead or Phillips, depending on your valve)
• PTFE tape (thread seal tape)
• Replacement O-rings, seals, or packing material (if necessary)
• A small brush or cloth for cleaning
• Plumbing grease or silicone lubricant

Safety first! Shut off the water supply feeding the valve.

• Locate the main shutoff valve and close it.
• Open a faucet downstream to relieve any remaining pressure in the system.
• Place a bucket or towel under the valve to catch any residual water.

Now it’s time to take the valve apart.

1. Remove the handle: Unscrew the small screw holding the handle in place and pull it off the valve stem.
2. Loosen the packing nut: Use a wrench to carefully loosen the nut below the handle.
3. Inspect the parts: You’ll likely see the valve stem, O-rings, and possibly the ball inside. Take note of how everything fits together so you can reassemble it correctly later.

Take a good look at the components:

• If the O-rings or seals are cracked, dried out, or worn, replace them with new ones.
• If the valve ball is scratched or pitted, it may need to be replaced too.
• Use a cloth or small brush to clean any debris or buildup inside the valve.

Pro tip: When buying replacement parts, take the old ones with you to ensure a perfect match.

Once the damaged parts are replaced and the components are clean:

1. Wrap threads with PTFE tape: Apply thread seal tape to the threads of the valve to prevent leaks.
2. Reinstall the parts: Put the valve ball, stem, and O-rings back in place. Tighten the packing nut snugly, but don’t overdo it.
3. Reattach the handle: Secure the handle with its screw.

Turn the water supply back on slowly and check for leaks.

• Open and close the valve a few times to ensure it’s working smoothly.
• If you notice a small leak around the stem, tighten the packing nut a little more.

Here’s how you can avoid running into the same issue again:

• Don’t over-tighten the valve when turning it off—it can wear out the seals.
• Perform regular checks to spot wear and tear early.
• Use high-quality brass valves, like the ones we manufacture at BORNIC, to ensure long-lasting performance.

Sometimes repairs aren’t enough, especially if the valve is old or heavily damaged. In such cases, replacing the valve is the better option. Make sure to choose a durable, high-quality brass ball valve to avoid problems in the future.

Fixing a leaking brass ball valve doesn’t have to be complicated. With a little patience and the right steps, you can handle the job yourself and save money on repairs. Just remember to act quickly when you notice a leak to prevent bigger problems.

For reliable and durable brass ball valves, BORNIC is here to help. Our valves are designed to stand the test of time, making sure you can fix it right the first time—and not have to worry about it for years to come.