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HomeNews How to Fix a Dripping Kitchen Sink Tap?

How to Fix a Dripping Kitchen Sink Tap?

2026-02-03

A dripping Kitchen Tap is more than just an annoyance; it represents a significant issue that plumbing and building professionals encounter regularly. The persistent sound of water drops and the visible waste can quickly escalate into client complaints, callbacks, and potentially larger problems like water damage or mould growth. For tradespeople, understanding the root causes and solutions is crucial for delivering efficient and lasting repairs. As a leading tapware manufacturer and supplier, we know that using high-quality components and having a solid repair methodology are key to professional success and client satisfaction.

The Real Cost of a Dripping Tap

Many homeowners and businesses underestimate the impact of a simple drip. The Australian Government’s Department of Climate Change, Energy, the Environment and Water provides clear data: a single tap leaking at one drop per second wastes over 12,000 litres of water annually. In cost terms, that can add over $200 to a yearly water bill, depending on local utility rates. Beyond the financial waste, persistent drips can lead to mineral stains on sinks, accelerated wear on seals and washers, and over time, even compromise the tap's structural integrity. For a professional, addressing this promptly prevents minor issues from becoming major, costly repairs.

Common Causes and Diagnostic Steps

Before any repair begins, accurate diagnosis is essential. The most common failure points in a kitchen mixer tap are internal and often relate to wear and tear.

  • Worn Ceramic Disc Cartridges: In modern quarter-turn or mixer taps, this is the most frequent culprit. Two ceramic discs control water flow and temperature. When grit or mineral deposits wear down the perfectly smooth surfaces, water leaks through.

  • Degraded O-Rings and Seals: These small rubber rings create watertight seals between moving parts. Constant water pressure, heat, and mineral content in the water can cause them to become brittle, cracked, or misshapen, leading to leaks, often from the tap's spout or base.

  • Faulty or Perished Washers: While less common in newer single-lever mixer designs, older-style taps and some specific models still use rubber or polymer washers. Repeated compression against the valve seat eventually causes wear.

  • Corroded Valve Seat: The connection point where the washer sits can corrode or develop pits from sediment, preventing a proper seal even with a new washer.

A systematic approach saves time. First, identify the tap type (single-lever mixer, dual-handle, pull-out). Second, locate the leak's origin—is it from the spout when closed, or around the base or handles? Third, ensure you have the correct tools, typically a flat-head and Phillips screwdriver, an adjustable spanner, and possibly an Allen key set.

Step-by-Step Repair Guide for a Single-Lever Mixer Tap

The single-lever kitchen mixer is the dominant design in Australian homes. Here is a reliable repair process:

1. Preparation and Safety: Shut off the hot and cold water isolation valves under the sink. Open the tap fully to drain any remaining water pressure and line. Place a plug in the sink drain to prevent small parts from falling in.

2. Disassembly:

  • Carefully pry off the decorative cap (hot/cold indicator) on the handle to reveal the retaining screw.

  • Remove the screw and gently lift off the handle. You may need to wiggle it if mineral deposits have caused sticking.

  • Use an adjustable spanner to loosen and remove the large bonnet nut or shroud that holds the cartridge assembly in place.

3. Identify and Replace the Core Component:

  • Gently pull the cartridge straight out. Critical Tip: Take note of the cartridge's orientation—the lugs and stem position—before removal. Photographing it with your phone is a smart practice.

  • This is the key moment. A high-quality, durable replacement cartridge is vital for a long-term fix. Inferior cartridges may fail quickly, leading to a callback. We design and manufacture our cartridges with precision-grade, wear-resistant ceramics and durable polymer housings to withstand Australian water conditions.

  • Insert the new cartridge in the exact same orientation as the old one. Replace any O-rings or seals that came with the new cartridge or show signs of wear.

4. Reassembly and Testing:

  • Reinstall the bonnet nut and tighten it firmly by hand, then give a gentle quarter-turn with the spanner. Avoid overtightening, which can damage threads or crack components.

  • Reattach the handle and secure the screw. Replace the decorative cap.

  • Slowly turn the water isolation valves back on. Operate the tap through hot and cold cycles to check for smooth operation and ensure the drip has stopped.

The Importance of Quality Parts for Lasting Repairs

For a professional, the success of a repair hinges on the quality of the replacement parts used. Choosing a reliable supplier directly impacts your reputation and efficiency. Here is a comparison of considerations:

ConsiderationLow-Quality / Generic PartHigh-Quality / OEM-Specification Part
Material & DurabilityMay use lower-grade ceramics or rubber prone to rapid wear.Features high-alumina ceramics and anti-scale rubber compounds for extended life.
Precision FitTolerances can be inconsistent, leading to difficult installation or slight leaks.Engineered to exact OEM dimensions for a perfect, hassle-free fit every time.
Long-Term PerformanceHigher likelihood of premature failure, risking client callbacks.Designed for reliability, reducing warranty issues and protecting your professional reputation.
Inventory & SupplyOften sourced from multiple channels with variable stock levels.A consistent, local Australian supplier ensures you have the parts you need, when you need them.

We understand these professional challenges intimately. Our commitment is to provide plumbing professionals and stockists across Australia with tapware and spare parts built to perform. Our focus on rigorous testing, durable materials, and maintaining comprehensive spare part inventories means that when you specify or use our products, you are investing in a solution designed to minimise future problems.

When Replacement is the Smarter Option

There are times when repair, while possible, is not the most economical or satisfactory long-term solution for your client. Consider recommending a full tap replacement in these scenarios:

  • Frequent Repairs: If the same tap has needed multiple fixes over a short period, it indicates systemic failure.

  • Obsolete Parts: The specific cartridge or seal is no longer available, making repair impossible.

  • Visible Damage: Significant corrosion, cracks in the tap body, or deep scoring on internal metal surfaces.

  • Client Preference for Upgrade: The opportunity to install a modern, more water-efficient, and aesthetically pleasing model that adds value to the kitchen.

Offering a replacement allows you to provide a comprehensive solution. Modern mixer taps offer superior performance, often with water-saving flow rates that align with sustainability goals, and contemporary designs that enhance a kitchen's look. Providing this option demonstrates a forward-thinking approach to client service.

Preventing Future Tap Issues

Proactive advice is a hallmark of a great professional. After a repair or installation, you can advise clients on simple practices to extend tap life:

  • Operate taps smoothly and avoid forcing handles.

  • Clean the aerator regularly to prevent sediment build-up that can enter the cartridge.

  • A quick monthly turn of the hot and cold isolation valves under the sink can prevent them from seizing.

Choosing products designed for durability from the outset is the ultimate form of prevention. Our engineering process prioritises robust internal mechanisms and uses materials selected for their compatibility with Australian water supplies. This results in tapware that delivers reliable performance, reducing the frequency of service interventions and supporting your business in building a reputation for quality and reliability. Trusting in well-manufactured products means fewer emergencies and more satisfied customers.


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