How to Install a Mixer Tap Like a Pro

Thinking about installing a mixer tap but don’t know where to start? Whether you’re tackling a kitchen sink or a basin mixer tap installation, getting it right ensures proper water flow and prevents leaks.

Many homeowners hesitate to replace their taps, thinking it’s a complicated job. But with the right tools, clear steps, and a little patience, you can complete your mixer tap installation without hiring a plumber.

Let’s walk you through everything you need to know—from removing the old tap to installing and testing the new one. 

Plus, we’ll share common mistakes to avoid and when to call a professional.

What is a Mixer Tap?

A mixer tap is a modern type of tap that mixes hot and cold water from a single spout, allowing you to adjust the temperature easily. Unlike traditional separate hot and cold taps, a mixer tap provides more convenience, better water control, and a sleek design.

Common types include:

• Kitchen sink mixer taps – Installed over a kitchen sink, often with a swivel spout.
• Basin mixer taps – Found in bathrooms, usually fixed in one place.
• Wall-mounted mixer taps – Installed directly on the wall, saving space.

No matter which type you choose, the installation process is similar.

Tools and Materials Needed for Mixer Tap Installation

Before starting your kitchen sink mixer tap installation or basin mixer tap installation, gather these tools:

• Adjustable wrench – For tightening and loosening nuts
• Plumber’s tape – To prevent leaks at pipe connections
• Bucket and towel – To catch water drips
• Screwdriver – For securing fittings
• Measuring tape – To ensure the tap fits correctly
• New mixer tap – Make sure it matches your sink’s size and hole layout

Important Preparation Steps:

• Turn off the water supply – Locate the shut-off valves under the sink and close them. 
• Drain remaining water – Open the existing tap to release any leftover water.
• Check compatibility – Ensure your new mixer tap matches the existing pipe setup.

Installing a Mixer Tap

Removing the Old Tap

1. Shut off the water supply to avoid leaks.
2. Place a bucket under the sink to catch any remaining water.
3. Use an adjustable wrench to loosen and disconnect the water pipes.
4. Remove the fixing nuts underneath the sink using a wrench.
5. Lift the old tap out carefully. If it’s stuck, apply gentle pressure.

Tip: Clean the sinkhole with a cloth before installing the new tap.

Preparing for the New Mixer Tap

1. Wrap the plumber’s tape around the threads of the tap fittings to create a watertight seal.
2. If the tap comes with rubber washers, position them correctly to prevent leaks.
3. Insert the mixer tap through the mounting hole in the sink or basin.

Tip: Some taps come with flexible hoses pre-attached. If yours doesn’t, screw them in tightly before inserting the tap.

Securing the New Mixer Tap

1. From underneath, attach the fixing bracket, washer, and nut to hold the tap in place.
2. Use a wrench to tighten the nuts until the tap is secure.
3. Check alignment to ensure the tap is straight before final tightening.

Tip: Don’t over-tighten, as this may crack the sink or damage the fittings.

Connecting the Water Supply

1. Connect the hot and cold water pipes to the correct inlets on the tap.
2. Use a wrench to secure the connections, ensuring they are snug but not too tight.
3. Double-check that the hoses are not twisted or kinked.

Tip: If your old tap had copper pipes, you may need adapters to fit new flexible hoses.

Testing the Mixer Tap

1. Turn the water supply back on and check for leaks.
2. Slowly turn on the tap and let the water run for a few minutes.
3. Check for leaks at the base and connections. If you see drips, tighten the fittings slightly.
4. Adjust the handle to test the hot and cold water flow.

Tip: If there’s low water pressure, check if the aerator is clogged.

Common Mistakes to Avoid

• Not turning off the water supply – Always shut off the water before removing the old tap.
• Skipping the plumber’s tape – This is essential to prevent leaks.
• Over-tightening connections – This can cause cracks and damage to fittings.
• Mixing up hot and cold pipes – Always check the markings before connecting.
• Not checking for leaks – Run the tap for a few minutes to ensure everything is sealed properly.

When to Call a Professional

While installing a mixer tap is a manageable DIY task, sometimes it’s best to call a plumber, especially if:

• There are constant leaks even after tightening fittings.
• Your existing plumbing is outdated, requiring new connections.
• The tap doesn’t fit properly, and modifications are needed.
• Water pressure is too low or uneven.

Ready Set Plumb offers fast, professional mixer tap installation for your kitchen and bathroom in Sydney.

Get your new tap installed