A leaking tap is more than just an annoyance—it can waste thousands of litres of water and increase your bills. If you’re asking, “why is my tap leaking”, the problem often stems from worn washers, faulty cartridges, or corrosion in the tap assembly. Understanding the causes helps you take immediate action and know when to call a licensed plumber.
Australian homes, especially older properties, frequently experience tap leaks due to ageing fixtures, hard water deposits, or improper installation. While some leaks can be fixed safely at home, persistent or complex issues require professional expertise to prevent ongoing water wastage and potential property damage.
Common Causes of Tap Leaks in Australian Homes
Tap leaks can occur in kitchens, bathrooms, or outdoor taps. Identifying the type of tap and its components is the first step in resolving the issue.
1. Worn or Damaged Washers
Most traditional taps rely on rubber or silicone washers to create a watertight seal. Over time:
- Washers compress, crack, or wear out
- Water begins to drip even when the tap is off
- Replacing the washer usually restores proper function
Washers are inexpensive and easy to replace, but proper installation is key to preventing further leaks.
2. Faulty Tap Cartridge
Modern mixer taps use cartridges to regulate flow and temperature. Signs of a faulty cartridge include:
- Continuous dripping or uneven water flow
- Difficulty turning the handle
- Temperature fluctuations when the tap is in use
Replacing the cartridge often resolves leaks in single-lever or mixer taps.
3. Corrosion and Mineral Build-Up
Australian homes with hard water are prone to limescale accumulation and metal corrosion, which can prevent tap seals from closing completely. Effects include:
- Dripping taps despite new washers
- Stiff or sticky handles
- Reduced water pressure
Regular cleaning or descaling can prevent leaks, but advanced corrosion may require tap replacement.
4. Loose or Worn Components
Over time, taps can loosen due to usage or improper installation. Common problems include:
- Loose packing nuts or handle screws
- Worn o-rings or seals
- Shaking or wobbling tap body
Tightening screws or replacing o-rings can often stop leaks, but persistent movement may indicate internal damage.
5. High Water Pressure
Excessive water pressure in your plumbing system can stress tap seals and joints, causing leaks. Indicators include:
- Dripping taps after each use
- Pulsing or fluctuating flow from multiple taps
- Water hammer noises
A licensed plumber can test your water pressure and install a regulator if needed.
How to Identify the Type of Tap Leak
Tap leaks can be classified by where and when water escapes:
- Drip from spout – Usually worn washer, cartridge, or valve seat
- Leak around base – Often worn o-ring or packing nut issue
- Continuous flow after use – Faulty cartridge or internal valve malfunction
Identifying the leak type helps determine whether a DIY fix is possible or if professional service is required.
Simple DIY Checks Before Calling a Plumber
Some minor tap leaks can be resolved safely with basic tools:
- Turn off the water supply before inspecting the tap
- Remove the handle and check washers or cartridges
- Clean mineral deposits using vinegar or descaling solutions
- Replace worn o-rings or tighten loose components
Even if a simple fix works temporarily, ongoing or multiple leaks may indicate a more serious plumbing issue.
When to Call a Professional
Persistent leaks, damaged tap bodies, or complex mixer systems require a licensed plumber. Full House Plumbing can:
- Diagnose the cause accurately
- Replace cartridges, washers, or entire tap units
- Address underlying issues such as high water pressure or pipe corrosion
- Ensure repairs meet Australian plumbing standards
Professional service prevents further water wastage, avoids potential damage to cabinets or benches, and ensures long-term reliability.
Benefits of Prompt Tap Repairs
Fixing a leaking tap quickly provides multiple advantages:
- Water conservation – Stop thousands of litres of water from being wasted each year
- Cost savings – Reduced water bills and avoided property damage
- Improved functionality – Smooth operation and consistent flow
- Compliance with regulations – Ensures repairs meet Australian plumbing standards
Conclusion
If you’re asking, “why is my tap leaking”, the cause could be worn washers, faulty cartridges, corrosion, or high water pressure. Identifying the problem early allows you to perform safe DIY checks or call a licensed plumber before the leak worsens.
For reliable tap repairs and plumbing solutions across Australia, Full House Plumbing provides professional inspections, repairs, and replacements to restore efficient and leak-free taps throughout your home.
FAQs
Why is my tap leaking after replacing the washer?
If a tap continues to leak after a washer replacement, it may indicate corrosion, a faulty cartridge, or misaligned components.
Can I fix a leaking tap myself?
Simple leaks caused by worn washers or loose components can be fixed safely, but persistent or complex leaks require a licensed plumber.
How much water does a leaking tap waste?
Even a slow drip can waste over 20,000 litres of water per year, depending on flow rate.
When should I call a plumber for a leaking tap?
Call a plumber if the leak continues after basic DIY checks, affects multiple taps, or causes water damage or dampness around fixtures.
