The Quick Answer: How to Fix a Leaking Tap
Knowing how to fix a leaking tap can save you hundreds of dollars in water bills and prevent long-term damage to your home. In most cases, a dripping tap is caused by a worn washer, O-ring, or ceramic cartridge — all of which are straightforward to replace with basic tools and a bit of confidence.
Whether you’re in regional Victoria or the suburbs of Melbourne, a leaking tap is one of the most common household plumbing issues Australians face. Left unattended, even a slow drip can waste thousands of litres of water each year — a serious concern given Victoria’s periodic water restrictions and conservation targets.
Why You Should Never Ignore a Dripping Tap
It’s easy to dismiss a slow drip as a minor annoyance, but the numbers tell a different story. A tap dripping once per second wastes more than 30 litres of water per day — that’s over 10,000 litres annually from a single tap.
Beyond water waste, persistent moisture around your tap seat and basin can lead to mould growth, corrosion, and damage to cabinetry. In older Victorian homes with timber vanities or heritage fittings, this kind of water damage can become very costly to repair.
Tools and Materials You’ll Need
Before you start, gather everything you need so the job goes smoothly. Most of these items are available at your local Bunnings or plumbing supply store.
- Adjustable spanner or shifting spanner
- Flathead and Phillips head screwdrivers
- Replacement tap washers or ceramic cartridge (match your tap brand)
- O-rings and tap lubricant (silicone-based)
- Tap reseating tool (if the tap seat is worn)
- Cloth or towel to protect the tap finish
- Plumber’s tape (PTFE tape)
It’s worth noting that tap fittings in Australia follow AS/NZS 3718, the standard for water supply fittings. When purchasing replacement parts, look for products that comply with this standard and carry the WaterMark certification to ensure they’re suitable for use in Victorian homes.
How to Fix a Leaking Tap: Step-by-Step
The process varies slightly depending on whether you have a traditional jumper valve tap or a modern ceramic disc tap, but the core steps are similar.
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 supply to that tap. If there’s no isolation valve, you’ll need to turn off the water at the main stopcock — usually located near your water metre at the front of the property. Turn on the tap to release any remaining pressure in the line.
Step 2: Remove the Tap Handle
Prise off the decorative cap on top of the handle to reveal the screw underneath. Unscrew it and carefully lift the handle away. Wrap your spanner jaws in a cloth to avoid scratching chrome or brushed nickel finishes.
Step 3: Replace the Washer or Cartridge
For a traditional tap, unscrew the headgear nut and pull out the jumper valve. Remove the old rubber washer from the bottom of the jumper valve and press in a new one of the same size. For a ceramic disc tap, pull out the cartridge and replace it entirely — these are not typically repairable.
While you have the tap apart, inspect the tap seat inside the tap body. If it feels rough or uneven, use a tap reseating tool to grind it smooth. A damaged seat will cause a new washer to fail quickly. If you’re planning a broader bathroom update, our renovation plumbing services can help you upgrade your entire tap setup at the same time.
Step 4: Reassemble and Test
Reassemble the tap in reverse order, making sure not to overtighten the headgear nut — this can crack older tap bodies. Slowly turn the isolation valve back on and check for leaks at the base of the tap and around the spout. Run the tap through its full range to confirm the drip has stopped.
Common Reasons Taps Leak in Victorian Homes
Understanding the root cause helps you choose the right fix. In Victoria, the most frequent culprits include:
- Worn rubber washers — the most common cause in older compression taps, particularly in homes built before the 1990s.
- Faulty ceramic cartridges — common in modern mixer taps; the disc can crack or become contaminated with sediment.
- Damaged O-rings — cause leaks around the base of the spout rather than from the spout itself.
- Corroded valve seat — water sediment builds up on the seat, preventing a watertight seal.
- Loose packing nut — causes leaking around the tap stem, often confused with a washer issue.
If you’re on tank water or a bore in rural Victoria, mineral deposits and sediment can accelerate wear on all of these components. Installing a water filtration system can significantly extend the life of your tap internals and reduce how often you need to replace parts.
When to Call a Professional
Some leaking tap situations go beyond a DIY fix. You should contact a licensed plumber if:
- The leak is coming from within the wall cavity or under the floor
- You’ve replaced the washer and the tap is still dripping
- The tap body itself is cracked or corroded
- You have no isolation valve and need to shut off the main supply
- You’re dealing with a burst pipe rather than a simple tap leak
In Victoria, any work that involves connecting or disconnecting water supply pipes must be carried out by a licensed plumber under the Plumbing Regulations 2018. Attempting this work unlicensed can void your home insurance and create liability issues when you sell.
The team at Blu-Stream Plumbing services homeowners across Victoria, including the Shepparton and Cobram regions. If you’re not confident tackling the repair yourself — or if the problem keeps coming back — get in touch for a fast, reliable assessment from a fully licensed local plumber.
Conclusion
Learning how to fix a leaking tap is a genuinely useful skill for any Victorian homeowner. In many cases, the fix is as simple as replacing a rubber washer or ceramic cartridge — a job that takes under an hour and costs very little in materials.
That said, it’s important to know your limits. If the repair is beyond a basic washer swap, or if you’re unsure about isolating the water supply safely, calling a licensed plumber is always the right call. Blu-Stream Plumbing is here to help when the job needs a professional touch. Check out the Blu-Stream Plumbing blog for more practical guides on keeping your home’s plumbing in top shape.
Frequently Asked Questions
How do I know what type of tap I have?
Traditional compression taps have separate hot and cold handles that you turn multiple times to open and close. Mixer taps have a single lever or handle that controls both temperature and flow. Ceramic disc taps feel smooth and require only a quarter-turn to operate. Identifying your tap type helps you purchase the correct replacement parts before you start the repair.
Can I fix a leaking tap without turning off the mains?
Yes — if your tap has an isolation valve directly beneath it (common in modern Australian homes), you only need to close that valve rather than shutting off the entire mains supply. Turn the slot on the valve 90 degrees with a flathead screwdriver so it sits across the pipe, then proceed with the repair. Always open the tap first to release pressure before dismantling anything.
How much water does a leaking tap waste in Victoria?
A tap dripping at one drop per second wastes approximately 30 litres per day, or around 10,950 litres per year. With water pricing in Victoria typically charged in tiered blocks, a leaking tap can add a noticeable amount to your quarterly water bill — quite apart from the environmental impact during water-restricted periods.
Is it legal to do my own tap repairs in Victoria?
In Victoria, homeowners are generally permitted to replace tap washers and similar minor maintenance tasks. However, any work involving the connection or disconnection of water supply pipes — including replacing an entire tap fixture — must be performed by a licensed plumber under the Plumbing Regulations 2018. When in doubt, consult a licensed professional to ensure the work is compliant and your insurance remains valid. For more about what we do, visit our homepage.