Overview of the Problem – A Leaking Toilet and a Dripping Kitchen Mixer

At a property on Westbrook Street in Chadstone VIC 3148, our team at Your Choice Plumbers was called out after the homeowner reported two separate plumbing problems around the home.

The first was a leak showing at the back of the toilet bowl. The second was a kitchen mixer tap that had started dripping and had also become difficult to operate.

This is exactly the type of situation where homeowners start asking, “why is my toilet leaking at the back?” or “why is my kitchen mixer dripping and getting stiff to turn?” As an experienced plumber Chadstone, we often find that what looks like a couple of small maintenance issues can sometimes point to a broader pressure problem affecting the whole plumbing system.

Why This Was More Than Two Small Plumbing Repairs

At first glance, the homeowner’s issues looked like two separate routine repairs:

  • a toilet leak
  • a dripping mixer tap

However, once we began diagnosing the kitchen mixer and tested the property’s mains pressure, the wider cause became clear.

The home’s incoming water pressure was sitting at 700 kPa, which is well above the 500 kPa maximum referenced under AS/NZS 3500.

That immediately changed the job from simple fixture maintenance into a broader plumbing protection issue.

This is something we often explain on leaking tap repairs Melbourne jobs, because a dripping mixer is often not just about age or wear — it can also be a sign that excessive pressure has been stressing the internal cartridge for some time.

Diagnosing the Toilet Leak Properly

We first assessed the toilet leak at the back of the pan.

Our inspection confirmed that the leak was being caused by ageing rubber connection components rather than a cracked pan or major pipe failure.

To restore the toilet properly, we replaced:

  • the pan cone
  • the flush pipe rubber

These were the key worn components allowing water to escape during the flush cycle.

To complete the job neatly and hygienically, we also applied a fresh silicone seal around the base of the toilet pan.

That gave the toilet:

  • a proper flush seal again
  • a cleaner finished appearance
  • better protection against water escaping around the base area

This is something we often see on leaking toilet jobs, where older toilet connection rubbers begin to perish and create leaks during use.

Diagnosing the Dripping and Stiff Kitchen Mixer

We then moved to the kitchen mixer tap.

The homeowner had noticed two separate symptoms:

  • the tap was dripping
  • the handle had become stiff and difficult to operate

Once we inspected the mixer internals, it became clear that the tap’s cartridge had been worn out and was no longer operating smoothly.

This is a very common sign of excessive pressure stress in mixer taps. High mains pressure can shorten the life of internal ceramic cartridges and lead to:

  • dripping at the outlet
  • premature cartridge wear
  • harder handle movement
  • reduced control over water flow

To restore the mixer properly, we installed a new Uni-fit mixer cartridge and tested the tap to confirm smooth operation again.

Why High Water Pressure Was the Bigger Household Risk

While the toilet leak and mixer tap issues both needed attention, the most important finding on the job was still the property’s incoming pressure of 700 kPa.

At that level, the plumbing system was operating under unnecessary stress, which can affect:

  • mixer cartridges
  • toilet valves and seals
  • flexible hoses
  • appliances
  • hot water components
  • other fittings throughout the home

That meant replacing the worn tap cartridge alone would not have been enough. Without pressure control, the new parts would still be exposed to the same damaging conditions that caused the early wear in the first place.

This is where pressure limiting valve and PRV installation jobs become so important, because the real long-term solution starts at the meter.

Pressure Regulation at the Meter

To protect the repaired fixtures and the rest of the home’s plumbing, we installed a pressure regulating valve (PRV) at the water meter.

We then adjusted the system so the home’s pressure was reduced from 700 kPa down to a safe and compliant 480 kPa.

That gave the homeowner:

  • a much safer operating pressure
  • better protection for the new mixer cartridge
  • reduced stress on the toilet components
  • improved protection for the wider plumbing system

So while the job began as fixture maintenance, it finished as a much broader whole-home plumbing protection upgrade.

Final Result and Client Outcome

Once the works were complete, the homeowner had:

  • the toilet leak resolved properly
  • new toilet sealing components installed
  • a freshly sealed toilet base
  • the kitchen mixer restored with a new cartridge
  • water pressure reduced from 700 kPa to 480 kPa
  • better long-term protection for the home’s plumbing system

The owner was very pleased that the visible leaks were resolved and that the wider pressure issue had also been identified and corrected properly.

Compliance with Australian Standards

This case directly related to the pressure control requirements referenced under AS/NZS 3500, which requires residential water pressure to be regulated to a maximum of 500 kPa, together with the servicing and replacement of plumbing fixture components affected by wear and pressure stress.

In practical terms, this meant the job was not just about stopping one toilet leak and one dripping tap. It was also about bringing the home’s plumbing back into a safer operating range so the repaired fixtures and the rest of the system were better protected moving forward.

All work carried out by Your Choice Plumbers is completed in accordance with the relevant plumbing standards so everyday plumbing issues are resolved properly and not just patched on the surface.

Our Home Plumbing Experts Approach

As part of our Home Plumbing Experts approach, we focus on both repair and prevention.

We include our complimentary Property Protection Audit with plumbing services to help homeowners understand hidden risks like excessive water pressure, unsafe hot water temperatures, and ageing flexible hoses before they turn into emergencies.

Find out more about our leaking toilet, leaking tap repairs Melbourne, and pressure limiting valve and PRV installation services.

Looking for a Plumber in Chadstone?

If you’re dealing with a leaking toilet, a dripping mixer tap, or suspect high water pressure is affecting your fixtures, visit our Plumber Chadstone page to learn more about how we help local homeowners.