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Cost to Install a Kitchen Prep Sink

Installing a kitchen prep sink means measuring and cutting a countertop opening, setting the sink with caulk and mounting clips, then connecting the faucet, supply lines, drain strainer, and P-trap. The work is moderately difficult because the opening must match the template and every plumbing connection needs to be watertight.

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Common reasons homeowners do this job

  • Replacing an existing kitchen prep sink.
  • The existing prep sink is worn or damaged.
  • Upgrading the kitchen with a new prep sink.
  • Choosing a new prep sink that fits the available countertop space.

DIY or call a pro?

This is a legitimate DIY project for someone comfortable measuring and cutting a countertop opening from a template, securing mounting clips underneath, and connecting water and drain plumbing. Consider a professional if any of those steps feel unfamiliar or if you are unsure about any step. Shut off the water supply before starting, wear eye protection while cutting, and check every plumbing connection for leaks to prevent water damage.

Frequently asked questions

Can I install a kitchen prep sink myself?
Yes, if you are comfortable with the countertop cut and the faucet and drain connections. Measure the available countertop space first, confirm the locations of the water supply lines and drain pipes, and use the sink’s template to mark the layout before cutting.
What can make kitchen prep sink installation cost more?
The price can increase with the job’s size and the number of sinks, labor time, the sink and plumbing materials selected, and removal of an old sink. A small job may also include a minimum or trip charge.
What should be installed before the prep sink goes into the countertop?
Install the faucet and drain strainer on the sink before placing it in the countertop opening. Then apply a bead of caulk around the sink rim, place the sink in the opening, and attach the mounting clips underneath.
How can I avoid leaks after installing a prep sink?
Connect the water supply lines to the faucet and the drain assembly to the P-trap, then check all connections for leaks. Keep a bucket nearby while checking the plumbing, and make sure every connection is watertight before using the sink.

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