There is no fixed age at which every tap, cartridge or washer should be replaced. A sound tap body can remain useful through several internal-part repairs. A washer, O-ring or cartridge may fail earlier because of use, debris, pressure, water conditions, installation or part mismatch.
Replace the failed service part when the body, seat and interfaces remain sound and the correct part is available. Consider complete replacement when the body is cracked or badly corroded, operation is unsafe, or compatible parts cannot be found. Replacement also deserves consideration when the same fault returns after correct repair and the underlying cause has been addressed.
A tap and a cartridge do not share one lifespan
The word tap can refer to the entire fixture, but the parts inside it do different jobs. Traditional tap assemblies may use a spindle, jumper valve and washer to stop the flow. Mixer taps commonly use a model-specific ceramic or pressure-balancing cartridge. Both designs can also contain O-rings, seals, seats, aerators, flexible connectors and other components.
One worn component does not prove that the whole fixture has expired. It also does not prove that replacing the most obvious part will solve the fault. Water at the outlet, around the handle, below the benchtop or inside a wall points to different possible failure locations.
| Symptom | What may need checking | Why age is not enough |
|---|---|---|
| Outlet drips while closed | Washer or jumper valve, cartridge sealing surface, seat, debris and supply pressure | Have the fitted part checked if the leak continues |
| Handle is stiff or jerky | Cartridge, spindle, seals, corrosion, debris and model-specific lubrication requirements | Forcing the handle can damage an otherwise repairable mechanism |
| Water escapes around the base | O-rings, swivel seals, mounting, body and internal connections | The outlet valve may be sound while another seal has failed |
| Water appears in a cabinet or wall | Flexible hoses, connections, concealed body, pipework and surrounding damage | This can be an urgent connection or concealed leak, not normal cartridge wear |
| Flow is weak or uneven | Aerator, debris, isolation valve, hose, pressure, cartridge and other outlet restrictions | Replacing the complete tap will not fix every upstream restriction |
Our guide to common tap and mixer faults helps narrow the symptom before a repair decision is made.
What causes a washer or cartridge to fail early?
Internal parts wear through use, but operating conditions often matter more than the calendar. Common contributors include:
- Debris in the waterway: Installation swarf, sediment or corrosion products can score or obstruct sealing surfaces.
- Excessive or unstable pressure: Pressure outside the product's operating conditions can load seals, cartridges and flexible connections.
- Incorrect part selection: Cartridges that look similar can differ in diameter, height, ports, rotation and temperature-control function.
- Installation stress: Misalignment, poor support or over-tightening can distort parts and create leaks.
- Water conditions: Deposits and corrosion can affect moving parts, seats and finishes.
- Cleaning damage: Abrasive or unsuitable chemicals can damage a finish and may attack seals or coated surfaces.
- Frequent operation: A heavily used kitchen, workplace or public tap accumulates operating cycles faster than a lightly used spare-bathroom fixture.
If a replacement cartridge or washer fails again quickly, do not keep fitting the same part without checking the cause. The tap seat, body, pressure, debris, hose or installation may be damaging each replacement.
Does a warranty tell you how long the tap will last?
No. A warranty states the manufacturer's coverage and conditions for a particular product. It is not an expiry date or a promise that the product will operate for that entire period.
Manufacturers can publish different terms for the cartridge, tap body, finish, other parts and labour. Coverage may also depend on approved installation, operating pressure, flushing, maintenance, cleaning and use of the correct service components. A cartridge warranty from one mixer says nothing about the likely life of a different tap or a rubber washer.
Keep the model details, receipt, installation record and warranty document. These help identify the correct part and determine whether the manufacturer or supplier should inspect a premature failure.
When is replacing the internal part sensible?
A targeted repair is worth considering when the fault is identified and the tap body and seat remain usable. An exact approved replacement component must also be available. The repair should restore normal shut-off and movement without forcing, leaks or improvised parts.
Before fitting a cartridge, confirm the brand, model and component reference. Do not rely only on the outside appearance or nominal diameter. Port layout, locating lugs, stem dimensions, rotation and temperature-limiting features can differ between products.
A washer or jumper-valve repair also needs more than a piece of rubber that happens to fit. The seat and spindle must be serviceable, and the replacement needs to suit the assembly. An incorrect or over-tightened washer may mask the problem briefly while damaging operation.
When should the complete tap be replaced?
Full replacement becomes the stronger option when repair cannot return the fixture to reliable, safe operation. Reasons can include:
- a crack, pinhole or leak through the tap body
- advanced corrosion or damaged threads and sealing surfaces
- a loose or damaged concealed body that cannot be serviced from the accessible side
- recurring faults after correct repair and correction of the contributing cause
- obsolete or unidentifiable parts with no verified compatible replacement
- unsafe temperature control or operation that the service parts cannot restore
- a replacement product being required for a changed use or installation.
Age can inform parts availability and the likelihood of accumulated wear, but it should not decide the job alone. An older tap that is sound and repairable does not need automatic replacement. A recently installed tap may need complete replacement after physical damage, a failed casting or an unsuitable installation.
See what complete tap replacement involves in Queensland before treating it as the same task as changing a washer.
What should be checked before buying a new tap?
New tapware and listed tap accessories need current WaterMark certification for their approved use. Tap equipment supplied in Australia is also regulated under the WELS scheme. Check the exact model rather than assuming that a logo used elsewhere in a product range covers the item being installed.
The replacement must suit the mounting, connections, available pressure and temperature, outlet use and surrounding space. A mixer with a different body depth, hose arrangement or set-out may require more than a like-for-like fixture swap.
Changing flow controllers or fitting unapproved components can also affect the product's registered configuration and performance. Keep the supplied components together and follow the product instructions rather than mixing spare parts from different models.
Can you replace a washer yourself in Queensland?
Queensland lists replacement of a jumper valve or washer in a tap as unregulated plumbing work. A person doing that narrow task still has to meet the minimum requirements and needs enough competence to isolate and reassemble the fitting safely.
That allowance does not make complete tap replacement, fixed pipe alteration or concealed mixer work unregulated. QBCC guidance treats replacement of the tap itself as work for an appropriately licensed plumber. The classification can also change when the job extends into pipework, another fixture or a broader renovation.
Stop if the isolation valve is seized or leaks, the fixture is concealed, the body is damaged, the correct component cannot be identified or the repair requires force. Do not continue dismantling a pressurised fitting in the hope that an upstream valve will hold.
What should you do when a tap leak becomes urgent?
A slow outlet drip is different from a split hose, cracked body or connection that is spraying water. Stop using the fixture and isolate the water through a known safe valve if a leak is worsening. Do not force a seized isolation valve.
Keep clear if water has reached a power point, appliance, switchboard or other electrical equipment. Do not touch wet switches or fittings. Arrange the appropriate plumbing and electrical response, and move items away only where that can be done without entering the wet electrical area.
For a wall-mounted or concealed mixer, water appearing outside the trim can indicate a leak behind the finished surface. Stop exploratory dismantling and have the concealed body and surrounding area assessed before damage spreads.
Record the tap model, exact leak location, operating symptoms and any recent repair. Ask a licensed plumber to determine whether the correct service part will restore the fixture or whether complete replacement is the more reliable option.