How to Replace a Kitchen Sink

Learning how to replace a kitchen sink can save you money and give your kitchen a fresh look. With over 20 years of fitting sinks across the UK, we’ve created this expert guide to make the process clear and manageable.

Can you replace a kitchen sink yourself?

Yes, in many cases a confident DIYer can handle how to replace a kitchen sink with the right tools and preparation. The key is to plan carefully, isolate your water supply and follow the correct sequence.

Tools and parts you will need

• Adjustable spanner and screwdriver

• Silicone sealant and sealant gun

• PTFE tape

• Basin wrench

• Bucket, towels and a torch

• Your new sink, tap and waste kit

If you are still deciding on a new model, browse Kitchen Sinks and read Nesstar’s Kitchen Sink Buying Guide.

Step 1. Isolate water and disconnect plumbing

• Turn off isolation valves or the main stopcock.

• Place a bucket under the trap and disconnect the waste pipes.

• Loosen tap connections carefully to avoid damaging flexible tails.

Step 2. Remove the old sink

• Cut away old sealant from around the sink edge.

• Undo the clips or brackets holding it to the worktop.

• Lift out the old sink carefully, using a second person for larger bowls.

Step 3. Prepare the cut-out

• Clean the worktop opening thoroughly.

• Check the new sink dimensions match the cut-out.

• Apply a fresh bead of sealant around the edge of the cut-out.

Step 4. Install the new sink

• Lower the new sink into place and secure with fixing clips.

• Fit the tap and waste before final tightening. For help, see How to Install a Kitchen Sink: Tools, Time, and Tips.

Step 5. Reconnect plumbing and test

• Reconnect the trap and waste pipes, checking seals are tight.

• Reattach the hot and cold water supply lines.

• Turn the water on slowly and check for leaks with kitchen roll.

Choosing the right accessories

A new sink is the perfect time to upgrade. Consider:

• Kitchen Sink Accessories for organisation

• Kitchen Sinks with Waste Kit for a matched set

• Kitchen Taps to finish the look

When to call a professional

If your worktop cut-out needs enlarging, or if your plumbing is outdated, it may be safer to call an installer. For compliance and safety, check the Water Regulations Advisory Scheme (WRAS).

Final thoughts on how to replace a kitchen sink

With careful preparation, the right tools and patience, most homeowners can learn how to replace a kitchen sink themselves. If you prefer a professional finish, you can still use this guide to understand the process and make informed choices.

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Learn how to replace a kitchen sink with our UK step by step guide. Expert advice from Nesstar’s 20 years of fitting sinks, plus tips on taps and accessories.