You did everything right.
You watched the video, turned off the water, dismantled the tap, replaced the washer, put everything back together, and turned the water back on.
Then you waited.
Drip.
Still leaking.
It is one of the most frustrating DIY plumbing experiences because you have already done the “obvious” repair and the problem is still there.
The good news? You probably did not do anything wrong.
Most Leaking Tap Repair in Northern Beaches callouts follow exactly this pattern — the washer gets replaced, the tap still drips, and the real issue turns out to be something else.
The washer is often only one part of the problem.
The Washer Is Not the Only Part That Wears Out
For decades the standard advice has been simple:
Dripping tap? Replace the washer.
Sometimes that works.
But the washer is only half of the sealing system.
Every time you turn the tap off, the washer presses against a brass surface called the valve seat.
For the tap to seal properly:
The washer must be in good condition
The valve seat must be smooth and even
If the valve seat becomes worn, pitted, or rough, even a brand-new washer cannot seal correctly.
Water slips through the damaged surface and the dripping continues.
A large percentage of Leaking Tap Repair in Northern Beaches jobs after failed DIY repairs come back to worn valve seats.
How Valve Seats Become Damaged
Valve seats wear gradually over time.
Every time the tap closes:
Washer → compresses against brass seat → opens again
This happens thousands of times each year.
Eventually:
Small grooves develop
Mineral deposits build up
Corrosion appears
The surface becomes uneven
Once this happens, the seat starts damaging washers faster.
A washer that should last years suddenly lasts months.
Then weeks.
Each replacement fails sooner because the seat itself keeps getting worse.
A Damaged Valve Seat Often Makes Noise
There is usually a clue homeowners miss.
Taps with worn valve seats often sound different.
You might notice:
Chattering
Vibrating
Juddering when switched off
Screeching sounds
Whining during operation
This happens because the washer is bouncing across an uneven surface trying to seal.
Many plumbers handling Leaking Tap Repair in Northern Beaches jobs will often listen to the tap before dismantling it because the sound gives away the issue.
How Plumbers Fix Valve Seat Problems
A licensed plumber uses a tool called a seat reseater.
This tool fits into the tap body and carefully cuts the valve seat back to a smooth surface.
The process:
Recondition the seat
Install a new washer
Reassemble the tap
Once the surface is restored, the washer can finally seal properly.
If the seat is severely corroded, the entire tap body may require replacement.
This is less common but happens in taps that have been left dripping for long periods.
Prompt Leaking Tap Repair in Northern Beaches services often prevent minor repairs becoming full replacements.
Other Reasons Your Tap Still Drips
Valve seats are the most common culprit, but not the only one.
Incorrect Washer Size
Washers are not universal.
A washer that is slightly too large or too small may not seat correctly.
Using the closest size available does not always work.
Worn Jumper Valve
The jumper valve is the brass fitting that holds the washer.
If it becomes worn, bent, or uneven:
The washer sits crooked
Pressure becomes uneven
Water continues leaking
Replacing the jumper valve and washer together often gives better results.
O-Ring Failure
Sometimes the leak is not coming from the spout at all.
A worn O-ring can allow water to escape around the spindle area.
This often appears like a dripping tap when the real leak originates near the handle.
Many Leaking Tap Repair in Northern Beaches jobs involve replacing O-rings at the same time.
Spindle Damage
The spindle pushes the washer into place.
If it becomes:
Bent
Worn
Thread damaged
the washer cannot seal evenly.
Fortunately, spindles can usually be replaced independently.
Tap Body Corrosion
Older taps sometimes reach the point where repairs stop making sense.
Internal corrosion eventually prevents components sealing properly.
At that stage, replacement becomes the practical option.
Mixer Taps Work Differently
If your tap is a single-handle mixer tap, the washer discussion changes completely.
Mixer taps generally use ceramic disc cartridges, not washers.
When mixer taps leak:
The cartridge usually needs replacement.
A washer change will not fix it.
The challenge is that cartridges are often brand-specific.
Before calling for Leaking Tap Repair in Northern Beaches, check the tap brand logo if possible.
Providing the make and model helps plumbers bring the correct replacement part.
Common cartridges can often be fixed in one visit.
Less common models may require ordering parts.
Why DIY Washer Changes Often Fail
DIY repairs are not usually the problem.
Most homeowners replace washers correctly.
The issue is that a washer change only addresses one possible failure point.
Without checking:
Valve seats
O-rings
Jumper valves
Spindles
Corrosion
you are fixing part of the system and hoping the rest is fine.
Professional Leaking Tap Repair in Northern Beaches services inspect the entire assembly while it is apart.
That is often the difference between:
A repair lasting weeks
and
A repair lasting years
Do Not Ignore the Drip
A dripping tap wastes water, but that is only part of the issue.
Every drip continues wearing the valve seat.
What starts as:
Small repair → seat reconditioning
can eventually become:
Full tap replacement
The longer it runs, the more expensive it becomes.
Getting professional Leaking Tap Repair in Northern Beaches assistance early usually means a quicker and simpler fix.
Final Thoughts
If your tap is still dripping after changing the washer, do not assume you failed.
The washer is often only one piece of the puzzle.
Valve seats, jumper valves, O-rings, spindles, and internal corrosion all play a role.
A proper inspection identifies the real issue and fixes it properly the first time.
Because ultimately, the goal is simple:
Stop the drip.
Fix it once.
Forget about it.