• This Old House plumbing and heating expert Richard Trethewey switches out a kitchen sink.


    1. Close the hot- and cold-water shut-off valves under the sink.
    2. Unscrew the water-supply lines and waste line from the old sink and garbage disposer.
    3. Remove the basket strainer from the old sink.
    4. From below, push up to remove the sink from the countertop.
    5. Disconnect the old disposer from the sink.
    6. Set the new sink down into the countertop to test its fit.
    7. Lift out the new sink and attach the basket strainer and faucet.
    8. Attach to the new sink the new garbage disposer's strainer and mounting rings.
    9. Apply continuous bead of silicone caulk to the countertop around sink opening.
    10. Set the new sink down into the countertop.
    11. Make the electrical connections to the garbage disposer.
    12. Use hammer and slotted screwdriver to remove knockout plug from discharge port on side of disposer
    13. Make up hot- and cold-water connections to the faucet.
    14. If necessary, install new PVC drainpipe, using PVC primer and cement.
    15. Turn the water back on and test the connections.

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    • Difficulty: Moderate
      Requires some plumbing experience, and working inside a sink cabinet is tight.
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      Tools List

      • flathead screwdriver
        Screwdriver, for tightening screws
      • finish hammer
        Hammer, used to remove knockout plug from side of disposer
      • caulk gun
        Caulk gun

      Shopping List

      1. Self-rimming kitchen sink, to replace old sink

      2. Silicone caulk, used to seal new sink to countertop

      3. Plumber's putty, for forming a watertight seal under faucet, disposer and basket strainer 4. Garbage disposer, to replace old disposer

      5. PVC pipe and fittings, required if changing drain pipe

      6. PVC pipe primer

      7. PVC pipe cement