How to Fix a Leaking Tap: Step-by-Step for Every Tap Type

Before you begin, it’s important to note that some plumbing repairs in Australia require a licensed plumber by law. If you’re unsure whether your repair falls within the scope of DIY work in your state or territory, contact PVS Plumbing before proceeding.

Why Is My Tap Leaking?

A leaking tap is almost always caused by worn or damaged internal components. The specific cause depends on the type of tap you have:

• Worn washers are the most common cause in older compression taps
• Damaged ceramic discs are typical in modern ceramic disc taps
• Worn O-rings or seals cause leaks around the spout base or handle
• Corroded valve seats prevent a proper seal between the washer and the tap body
• Loose packing nuts allow water to escape around the stem

Identifying your tap type is the first step to fixing it correctly.

What Type of Tap Do I Have?

There are three main tap types found in Australian homes:

1. Compression (washer) taps, Require you to turn the handle multiple times to open or close. Common in older homes.
2. Ceramic disc taps, Use a quarter-turn mechanism. Found in most modern Australian homes.
3. Ball taps, Feature a single handle that rotates over a rounded cap. More common in kitchens.

If you’re unsure which type you have or need help with a repair, explore our tap and mixer services.

What Tools Do I Need to Fix a Leaking Tap?

Gather these tools before you start:

• Adjustable spanner
• Flat-head and Phillips-head screwdrivers
• Replacement washers, O-rings, or ceramic cartridge (match to your tap model)
• Plumber’s grease
• Cloth or towel
• Small container or bucket
• Penetrating oil (if fittings are corroded)

How to Fix a Leaking Compression (Washer) Tap

Compression taps are the most straightforward to repair. The most likely cause is a worn rubber washer.

Step 1: Turn Off the Water Supply

Locate the isolation valve under the sink or basin and turn it clockwise to shut off the water. If there’s no isolation valve, turn off the mains water supply at the water meter. Turn the tap on to release any remaining pressure in the line.

Step 2: Remove the Tap Handle

Pry off the decorative cap on top of the handle (usually marked H for hot or C for cold). Underneath you’ll find a screw, remove it with a screwdriver and lift the handle off.

Step 3: Remove the Packing Nut

Use an adjustable spanner to loosen and remove the packing nut. Turn anti-clockwise. Place a cloth over the tap body first to avoid scratching the finish.

Step 4: Pull Out the Stem

Once the packing nut is removed, pull the stem straight out. You’ll see the rubber washer at the bottom, held in place by a brass screw.

Step 5: Replace the Washer

Remove the old washer by unscrewing the brass screw. Take the old washer to your local hardware store to find an exact match, or use a universal washer kit. Press the new washer firmly into place and reattach the screw.

Step 6: Inspect and Replace the O-Ring if Needed

While you have the stem out, check the O-ring on the side. If it looks flattened, cracked, or worn, slide it off and replace it. Apply a small amount of plumber’s grease to the new O-ring before fitting.

Step 7: Reassemble the Tap

Reinsert the stem, hand-tighten the packing nut, then give it a firm quarter-turn with the spanner. Replace the handle and screw, and snap the decorative cap back on.

Step 8: Turn the Water Back On and Test

Slowly turn the water supply back on and check for leaks. Turn the tap on and off a few times to confirm it’s working correctly.

How to Fix a Leaking Ceramic Disc Tap

Ceramic disc taps use a cartridge with two ceramic discs that slide against each other to control water flow. If the tap drips or is stiff to operate, the cartridge likely needs replacing.

Step 1: Turn Off the Water Supply

As above, shut off the isolation valve or mains supply and release pressure by opening the tap.

Step 2: Remove the Handle

Locate and remove the screw under the decorative cap on top of the handle. Lift the handle free.

Step 3: Unscrew the Cartridge Retaining Nut

You’ll see a nut or collar holding the ceramic cartridge in place. Use your spanner to remove it, turning anti-clockwise.

Step 4: Remove the Cartridge

Lift the cartridge straight out. Take note of its orientation before removing it so you can reinstall the new one correctly. Take the old cartridge to a plumbing supplier or hardware store to find a matching replacement.

Step 5: Clean the Tap Body

Wipe out the inside of the tap body with a damp cloth to remove any sediment or debris that could interfere with the new cartridge.

Step 6: Insert the New Cartridge

Slide the new cartridge into position, making sure it’s oriented the same way as the old one. Hand-tighten the retaining nut, then secure with the spanner. Do not overtighten.

Step 7: Reassemble and Test

Reattach the handle, replace the screw and cap, then turn the water back on slowly. Test the tap through its full range of motion.

How to Fix a Leaking Ball Tap

Ball taps have more internal components and are slightly more involved to repair. If the tap leaks from the spout, worn springs or seats are usually to blame. A leak at the base of the handle points to worn O-rings.

Step 1: Turn Off the Water Supply

Shut off the isolation valve under the sink and open the tap to release pressure.

Step 2: Remove the Handle

Loosen the set screw on the side of the handle (usually requires an Allen key) and pull the handle upward to remove it.

Step 3: Remove the Cap and Collar

Unscrew the cap and collar by hand or with adjustable pliers. Wrap the pliers with tape to avoid scratching.

Step 4: Remove the Ball, Cam, Packing, and Springs

Lift out the plastic cam and packing, then the ball. Underneath, you’ll find two small springs and rubber seats, use a flat-head screwdriver to remove them carefully.

Step 5: Replace Worn Components

Replace the springs, seats, and O-rings as a set. Ball tap repair kits are available at most Australian hardware stores and include all the components you need. Apply plumber’s grease to all new rubber parts.

Step 6: Reassemble the Tap

Reinstate the ball (align the slot with the metal pin in the tap body), then layer back the cam and packing, collar, and cap. Reattach the handle and tighten the set screw.

Step 7: Turn the Water Back On and Test

Slowly restore the water supply and test for leaks at both the spout and the base of the handle.

When Should I Call a Licensed Plumber?

While many tap repairs are suitable for DIY, there are situations where you should always call a licensed plumber:

• The leak is at a pipe fitting or the wall, not the tap itself
• You can’t isolate the water supply
• The tap body is cracked or corroded beyond simple repair
• You’re in a rental property (the landlord is responsible for repairs)
• Your state or territory regulations require a licensed plumber for the specific work
• The repair requires soldering or working with copper pipe

PVS Plumbing’s licensed team is available across the area to handle tap repairs quickly and correctly, ensuring the work meets all Australian plumbing standards.

Tips to Prevent Tap Leaks in Future

• Don’t overtighten taps when closing them, this accelerates washer wear
• Have your taps serviced periodically as part of a home plumbing maintenance check
• Replace rubber components before they fail completely
• Install water pressure reducers if your home has high mains pressure, as this shortens the life of seals and washers

Frequently Asked Questions