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How to Replace a Sink

Learning how to replace a sink is a good way for do-it-yourselfers to expand their plumbing skills. When planning the project, decide if you want a sink of the same size as the old one. If you want a different size, then you’ll need to adjust the countertop opening. These instructions presume that you’re installing a sink of the same size.

Sink Replacement

Tools Needed to Learn How to Replace a Sink

You probably have most of these tools around the house already. Select a bucket that fits under the P-trap because it will be responsible for catching water under the sink.

  • Putty knife
  • Pipe wrench
  • Utility knife
  • Tape measure
  • Adjustable wrenches
  • Pliers
  • Screwdriver
  • Bucket
  • Hacksaw
  • Plumber’s putty
  • Caulking gun
  • Silicone sealant

How to Remove an Old Sink

  1. Shut off both hot and cold water supply lines to the faucet.
  2. Turn the faucet on to expel leftover water.
  3. Use wrenches to release nuts holding supply lines to the faucet.
  4. Catch water dripping from supply lines in bucket.
  5. Turn off circuit to garbage disposal, if present, and unplug the unit.
  6. Use pliers and wrenches as necessary to disconnect drain and P-trap from the sink.
    1. Position the bucket to catch water as you do this.
  7. Loosen hose clamp holding dishwasher drain line with screwdriver and pull drain line free.
  8. Loosen mounting bracket for disposal unit and twist free of sink.
  9. Locate sink clamps under counter and turn them toward sink bowl to release the sink.
  10. Cut caulk around the sink with a utility knife.
  11. Push upward from beneath the sink to shift it away from counter and then lift free from above.
    1. Disconnected faucet will come out along with the sink.
  12. Scrape off old caulk and grime on counter with putty knife.

Replace SinkHow to Replace a Sink

  1. Purchase new sink with dimensions that fit counter opening.
  2. Lower new sink into opening to confirm that it fits and then remove it again and set it aside for now.
  3. Position sink clips around the lower edge of new sink into the groove.
    1. Have clips turned inward toward sink bowl for now.
  4. Apply a bead of silicone sealant around the bottom edge of the sink.
  5. Lower sink into opening.
  6. Turn sink clips until they are underneath the counter and tighten their screws.
  7. Roll out a coil of plumber’s putty and wrap around bottom edge of drain strainer.
  8. Press strainer firmly into the drain opening.
  9. Install gasket and flange beneath strainer and tighten.
  10. Wipe off excess putty that squeezes out.
  11. If garbage disposal is present, attach mounting bracket beneath the drain.
  12. Reconnect the dishwasher drain by tightening the hose clamp.
  13. Connect disposal discharge pipe, or just drain pipe if there is no disposal, to P-trap and tighten fittings.
  14. If pipe is too long, measure and then cut it with a hacksaw to fit.
  15. If pipe is too short, buy a new pipe and cut to fit.
  16. Install new faucet according to manufacturer directions and reconnect water supply lines.

Get Help Installing a New Sink from the Experts at Oliver Heating & Cooling

Completing the steps for how to replace a sink is fairly straightforward and should only take a couple hours. If you don’t have time for the project or need to adjust your counter to fit the new sink, simply give the expert plumbers at Oliver Heating & Cooling a call. We provide residential plumbing services throughout the Delaware Valley. Ask us for a sink replacement estimate today.

Need help with this project?

If you do not have the time, tools, or experience necessary to complete the project, please contact the professionals at Oliver for help.

Contact us today at 1-888-810-2681 Get a Free Estimate
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