How To Install a New Kitchen Sink

New stainless sink

Before buying a kitchen sink, measure the depth and width of the countertop and cabinets. A kitchen cabinet with no backsplash is 24 inches in depth and can fit in a 22-inch sink. A countertop with backsplash fits a 20½-inch sink depth.

To install your new kitchen sink:

Laying out the sink’s location

  1. Mark the back edge of your countertop and center the sink with the cabinet.
  2. Use a sink template to trace the countertop hole.
  • Center the template on the cabinet with 1 1/2 inch spaces from the countertop’s front edge.
  • Secure the template with tape.
  • Draw the sink’s shape.

Without a template, outline the sink’s location with tape.

  • Mark the center at the sink’s back lip.
  • Place the sink upside down and align the center marks of the sink and countertop.
  • Position the sink parallel to the counter’s edge, with 1 1/2 inch spaces between the back edge and backsplash.
  • Draw the sink’s outline.
  • Make 1/8-inch marks towards the inside of the outline.
  • Using a straightedge, connect the inside lines.

Cutting the opening

  1. Drill 3/8-inch or 1/2-inch spade bit holes at each corner of the lines.
  2. Screw a longer scrap wood to the cutout hole to avoid it from falling off.
  3. Insert a jigsaw or saber-saw into the holes and saw the cutout lines.
  4. Fit and trim the sink opening as needed.

Installing the faucet

  1. Install the faucet. If there are no instructions, feed the tailpiece and supply tubing connected to the faucet through the gaskets and hole/s in the sink.
  2. Screw on the washers and mounting nuts to the sink deck’s underside.
  3. Swing the faucet across the sink before tightening the mounting nuts.

Attaching the sink strainer

  1. Apply plumber's putty under the lip of the strainer.
  2. Push the strainer through the drain hole.
  3. Connect the washer, housing and gasket to the sink.
  4. Add pipe-joint compound to the threads exposed.
  5. Tightly thread the locknut and set the strainer.
  6. Fit the tailpiece to the gasket and attach the slip nut to the strainer.

Setting the sink

  1. Make the countertop and sink’s seal watertight by applying plumber's putty or silicone caulk on the under perimeter of the sink’s lip.
  2. Set the sink into the opening.
  3. Insert wood scraps on the edge for added support.
  4. Check that the sink and countertop’s front edges are parallel.

Connecting the water supply

  1. Use flexible supply tubes to connect hot and cold faucet lines to the shut-off valves.
  2. Attach the sprayer hose to the threaded tailpiece.

Connecting the sink drain

  1. Attach the p-trap adapter to the tailpiece.
  2. Cut and fit PVC pipes to connect the trap adapter to the p-trap, waste line and drain elbow.
  3. Tighten threaded connections.

Attaching the dishwasher drain

  1. Attach the tailpiece’s waste nib to the dishwasher drain.
  2. Lock the hose clamp.

Checking for leaks

  1. Disconnect the faucet from the aerator.
  2. Turn on the water shut-off valves.
  3. Run the water full blast to flush the system.
  4. Check drain and supply lines for leaks.
  5. Tighten the nuts where leaks are found.
  6. Reinstall the aerator.

Setting the caulk
Fill the sink with water overnight to add weight and hold the sink, while the caulk sets.

Depending on your countertop design, your kitchen sink can be installed below, above, or built into your countertop.


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