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How to Fit a Kitchen Sink
couple fitting a kitchen sink

Installing a kitchen sink is a lot easier than you may think. As long as you don’t need to move any of the existing pipework, the process is fairly simple and can be carried out by DIYers of any skill level.

If you are installing a sink to replace an old one, the job is even easier, since you will already have the space cut-out of your kitchen counter to fit the new one into. If you are starting from scratch, you’ll have more options for the type of sink you can use but a little bit more work to do, to ready your work surface for installation.

Although the steps are simple, the task itself can be quite labour intensive, get someone to help you if you can. And if you do need to move pipes, then we recommend obtaining the services of a professional plumber to carry out the task. Otherwise, read on to learn how to install a sink yourself.

Tools & Materials

tool settool set

Like most things in life, preparation makes all the difference. The right tools and materials will ensure your installation is smooth and easy.

Typical resources you will need include:

  • Sink
  • Fixtures (taps)
  • Adjustable spanner or wrench
  • Caulk/ silicone sealant
  • Utility knife
  • Bucket
  • Towel and rags
  • Screwdriver
  • Plumber’s tape

How to Install a New Kitchen Sink

installing kitchen sinkinstalling kitchen sink

Two steps are labelled as optional, in these we will discuss the actions you need to undertake for correct installation for either replacing an old sink or installing from scratch.

Step 1:

Disconnect water and electricity – Unplug electrical appliances such as dishwashers to decrease the chance of mischief during installation. With your adjustable spanner disconnect the water supply under the sink. Turn on the taps and wait for the water to stop completely. Put the drainpipe in the bucket to collect excess water.

Step 2 A:

Remove old sink (optional) – Cut through the caulk with a box cutter or utility knife, be careful not to cut into the countertop. Unscrew the clips that mount the sink to the counter, use the screwdriver and be careful, have someone else holding the sink while you do this to stop the sink from falling unintentionally. Push from below and slowly pull the sink out of the countertop.

Step 2 B:

Cut the worktop to size (optional) – Place the new sink upside-down on the countertop. Then, with a pencil draw around it. Move the sink away and then draw a second line approximately 10mm in from the first, or by the depth listed in the instructions. Use a drill to make four holes, one for each corner. Then, with a jigsaw, carefully cut from one hole to another, supporting the surface from underneath so it doesn’t suddenly drop.

Step 3:

Clean and treat worktop – Remove the old silicone sealant or caulk, wipe down with a damp scouring pad and treat the inner edge of the countertop with a waterproof sealant. Once dry, you can begin the installation of the new sink.

Step 4:

Ready new sink for installation – Assemble the sink as per the manufacturer’s instruction (usually the tap and waste unit), then dry fit the sink to make sure it will fit snugly. Adjust the cut-out section of the countertop if necessary. Attach the fixing clips that help to keep your sink firmly in place once installed.

Step 5:

Apply sealant – With your sink upside-down, apply a silicone sealant to the outer rim. This ensures a water-tight seal. Sometimes you will have adhesive edging strips provided with your sink.

Step 6:

Position new sink – Install the new sink into place, being careful to make sure the fit is good. Attach the clips to the worktop surface and remove any excess sealant. If the sink is an under-counter model, you will need to hold the sink in place with brackets while the sealant dries.

Step 7:

Seal – Once installed, run a generous amount of sealant around the rim of the sink where it meets the countertop. Further helping to create a water-tight seal. Smooth the sealant down for a neat finish.

Step 8:

Connect plumbing – With flexible connectors, attach the new taps to your water supply. Use the plumber’s tape on the thread of the pipes to make a water-tight seal.

Step 9:

Test sink – Turn the water back on and check for any leaks. Run the taps to ensure everything is connected correctly. Tighten any fittings if necessary.

Step 10:

Clean up – Remove any excess sealant, tidy everything away and clean the sink and surrounding area.

Step 11:

Celebrate and relax – Well done, you have finished installing your new sink. Time to relax and get cleaning all the dirty dishes that have been piling up!

woman washing dishes in sinkwoman washing dishes in sink

And there you have it, as easy as that. Take your time and have someone help you to make the installation as painless as possible. Always follow the manufacturer's instructions and use a professional plumber if the job calls for it.

If you need more inspiration, feel free to take a look at our blog. A page jam-packed with ideas for every area of the home including how much a new kitchen will cost and how to fit a kitchen tap. If you have specific resource needs for your DIY project, don’t hesitate to give us a call and one of our award-winning customer service operatives will be able to help you.

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