How to Install Your Kitchen Sink

So, you’ve found your favourite new sink model and got it home ready to go. All that’s left to do now is install it. That might sound simple, but if you’ve never done it before you might struggle. The guide below will help you get started.

Who Can Install Your Kitchen Sink?

Many people think that installing a kitchen sink is a job best left to the professionals, and if you’re not comfortable attempting to do this on your own, then maybe it is. However, if you follow the instructions below carefully, your new sink will be ready to use in no time!

Now, do you have an undermount sink or an inset sink?

This is very important, to ensure you follow the appropriate instructions. This will be noted on the model at the point of purchasing, but if you’re not sure then there is a key difference between these two styles…

The undermount sink is designed to sit slightly underneath your worktop.

And inset sinks are designed to form a lip over the worktop.

How Do You Prepare Your Sink for Installation?

If you’re replacing an existing sink without replacing your worktop, then you need to check the measurements of your new model against those of your old one. In order to find what size kitchen sink you are replacing you need to measure the length, width, and depth.

Bonus tip: if you aren’t sure how kitchen sink plumbing works then read our article on maintaining your sink for more information before you begin the installation process.

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How Do You Install an Undermount Sink?

If you’re installing an undermount sink, follow these instructions:

1. Cut the required hole

As you already have your measurements, it’s time to create the hole in your worktop. If you’re replacing an existing sink unit and the dimensions are the same as your new model then you can skip this step. If not, you’ll have to widen the hole as needed.

2. Fit your sink

Place the sink in the hole. Note that the rim of your sink should sit below the rim of your worktop.

3. Attach the sink

Mark where the sink has to be attached. Bear in mind that you will often need to drill holes. If this is the case then remove the sink and drill the holes, then replace the sink and attach.

4. Apply sealant

Apply sealant between the sink and the worktop to ensure that it is totally waterproof. We recommend checking the sealant every 12 months and topping up as needed.

5. Insert your wing nuts

Your sink will need to be clamped in at this point, and you will need to attach your wing nuts to the sink’s screws. Ensure that the wing nuts are fully tightened.

6. Install your fittings

If you have had to replace your work surface, and need to cut a new hole in your worktop for your fittings (e.g. faucet and tap) do this once the sealant has set and everything is secure. This is also when you will plumb your sink in to your water supply.

Note: we recommend consulting your sink’s manual for precise instructions to use alongside the guide above.

How Do You Install an Inset Sink?

If you’re installing an inset sink, follow these instructions:

1. Mark your sink space

If your new sink is the same size as your old one, you can skip to step 3. If not, begin by marking your sink space on your work surface. It might help to turn your appliance upside down, place it on your worktop, and draw around the outside of the sink.

Next, remove the sink and draw another line 10mm inside the first line. This second line will mark where you will need to cut.

2. Cut your worktop hole

Drill a large hole in your worktop and using a padsaw, jigsaw or similar, cut through the surface along the inner outline of your sink.

3. Clip the sink to your worktop

Place the sink into the hole. This should fit neatly, leaving the lip resting on the worktop. You’ll then need to reach underneath the worktop and apply all of the sink clips.

4. Centre the sink

Once the sink’s centered you’ll need to tighten the fixing screws. Do not tighten fully straight away. First, ensure that you have positioned the sink correctly and then you can complete tightening the screws.