A leaking tap might seem like a small household annoyance, but anyone who has tried to fall asleep to the sound of constant dripping knows how quickly that tiny issue can become a major frustration. Beyond the irritation factor, a leaking tap can waste thousands of litres of water a year and contribute to higher water bills. Fortunately, many minor leaks can be fixed with some basic tools and a bit of patience. Understanding the cause of the leak and knowing when it’s time to call a professional can save you time, money, and stress.

Below, we’ll walk through the most common reasons taps leak, how you can attempt a DIY fix, and the warning signs that indicate it’s time to call a plumber.

Why Taps Leak in the First Place

Taps, like all plumbing fixtures, experience wear and tear over time. The most common causes of a leaking tap include:

1. Worn-out washers:
   Washers are small rubber components that create a watertight seal when the tap is closed. Over time, washers degrade, harden, or become misshapen, allowing water to seep through.
2. Damaged O-rings:
   The O-ring is another small rubber part found in mixer taps. When it cracks or wears out, it can cause leaks around the base or handle of the tap.
3. Faulty cartridges:
   Some modern taps use cartridges instead of traditional washers. If the cartridge becomes worn or clogged, leaks can develop.
4. Corrosion or mineral build-up:
   Hard water can cause mineral deposits inside your tap, while metal components may corrode over time. Both issues can affect the tap’s performance and lead to leaks.
5. Loose or damaged parts:
   Sometimes screws, seals, or internal components become loose or damaged, preventing the tap from shutting off properly.

Tools You’ll Need for a DIY Fix

If you’re ready to take on the repair yourself, gather the following tools:

• Adjustable wrench or spanner
• Screwdriver set
• Replacement washers, O-rings, or cartridges (depending on your tap type)
• Plumber’s grease
• Towel or bucket
• Allen key (for mixer taps)

Having the right tools on hand makes the job easier and helps prevent accidental damage to your fixtures.

Step-by-Step Guide to Fixing a Leaking Tap

1. Turn off the water supply

Before doing anything else, locate the isolation valve under your sink and turn it off. If there isn’t one, you may need to turn off your home’s main water supply. This step prevents water from spraying everywhere once you remove the tap.

2. Plug the sink

Small screws and washers can easily fall into the drain. Placing a plug or cloth over the drain ensures nothing disappears down the pipe.

3. Remove the tap handle

Most tap handles are secured with a small screw, often hidden under a cap. Use a screwdriver or Allen key to remove the handle and expose the tap mechanism.

4. Take out the internal components

Once the handle is removed, you’ll see the tap stem, cartridge, or spindle, depending on your tap type. Use a wrench to loosen and remove it. Pay attention to the order and orientation of each part so you can reassemble it correctly later.

5. Replace the washer, O-ring, or cartridge

Inspect the internal parts for signs of damage or wear. Washers may appear cracked or flattened; O-rings often become brittle; cartridges may feel stiff or clogged. Replace the damaged components with new ones of the correct size and type.

Tip: Take the old part to a hardware store to ensure an exact match.

6. Lubricate and reassemble

Before putting everything back together, apply a small amount of plumber’s grease to the O-ring and thread areas. This helps prevent future wear and makes the tap operate more smoothly.

Reassemble the tap in the reverse order you took it apart.

7. Turn the water back on and test

Turn your water supply back on and gently test the tap. If the leak has stopped, you’ve successfully fixed it. If it continues to drip, there may be a deeper issue.

When to Call a Plumber

While many leaks are simple enough for a confident DIYer to fix, certain situations require professional intervention. Here’s when you should call a licensed plumber:

1. The leak persists after your repair

If you’ve replaced the washer or cartridge and the tap still leaks, the issue may be caused by internal corrosion, damaged plumbing, or problems deeper in the system.

2. You have a mixer tap that’s difficult to dismantle

Some modern mixer taps can be complex and require specialised tools or expertise to repair. If you’re unsure, it’s safer to leave it to a professional.

3. There’s reduced water pressure

A leaking tap accompanied by low water pressure may indicate a blockage, pipe issue, or hidden leak somewhere else in your plumbing system.

4. You notice water pooling under your sink

This could signal a far more serious issue, such as a burst pipe or a failed seal in the tap assembly. Immediate professional help is recommended to avoid further damage.

5. You’re uncomfortable doing the repair

Not everyone is comfortable dismantling plumbing fixtures—and that’s perfectly fine. If you’re unsure, calling a plumber saves you from potential mistakes that can lead to bigger problems.

Preventing Future Tap Leaks

A little maintenance goes a long way. To prolong the life of your taps:

• Avoid overtightening when turning taps off.
• Clean around the tap regularly to prevent mineral build-up.
• Check for small drips early—don’t wait until they worsen.
• Schedule periodic plumbing inspections if you live in an older home.

Conclusion

A leaking tap is one of the most common household plumbing issues, and in many cases, it’s something you can fix yourself with the right tools and a bit of know-how. However, persistent leaks, damaged components, or signs of deeper plumbing problems mean it’s time to bring in a professional. If you’re facing a stubborn tap leak or simply prefer expert assistance, WTR PLUMBING is always ready to help with fast, reliable, and professional plumbing solutions.