Consumer Support

Installation Help

Installing a Moen Single Handle Lavatory Faucet

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To complete the project, you should first gather the tools and all the parts you will need. The basic steps to complete the installation are to prepare the mounting area, mount the faucet, connect the supply lines, install the waste assembly, and finally test and flush the faucet.

You should have the following tools available to you before you start: a flashlight, an adjustable wrench, pliers, safety glasses, a basin wrench, plumber's putty, flexible supply lines, Phillips head screwdriver, and a flat-head screwdriver.

Before You Start…
  • Skill Level & Time to Complete
    • Beginner - 3 to 4 hours
    • Intermediate - 2 to 3 hours
    • Advanced - 1-1/2 hours
  • Caution: Always turn water supply OFF before removing existing faucet.
  • Caution: Turn faucet on to relieve water pressure and to insure water is completely off.
  • Helpful Tip: Use a penetrating oil spray on the faucet mounting hardware to help loosen corrosion and assist in removing the existing faucet connections.
  • Helpful Tip: Remove mounting hardware using a basin wrench or channel lock pliers.
  • Helpful Tip: Thoroughly clean and dry the mounting surface after removal of your existing faucet.


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  1. 1

    Be sure mounting area is clean and dry. Orient deck gasket, then install the deck gasket to the lav assembly, pushing the gasket around the mounting studs until it is seated inside the bottom lip of the escutcheon.

  2. 2

    Caution: Severe bends of the supply lines may cause crimping and restricted water flow could result. If using flexible supply lines, which are not included with some models, thread supply line nuts onto tailpiece adapter finger tight, then holding tailpiece adapter with wrench, tighten nut with another wrench, rotating one-half turn.

  3. 3

    Install clamp bars – channel facing up – spacers and mounting nuts. Tilt clamp bar back as shown, then drop faucet with supplies attached down through deck. On decks thicker than three-quarter inch do not use spacer.

  4. 4

    Check faucet and gasket position and tighten the mounting nuts from below. Connect flexible supply lines to your existing hot and cold water supply lines.

    If you are not installing the waste assembly, your faucet installation is now complete and you should the move to the Faucet Flushing instructions below. If you are installing a waste assembly, move to step 5.

  5. 5

    If you are installing a new drain assembly as part of this project, choose the type of assembly you are installing from the list below. After installing a new drain assembly, be sure to return to this tutorial to complete the faucet flushing procedure.

    Metal Drain Assembly
    Non-Metal Drain Assembly

Flushing Instructions
  1. F1

    To avoid damage to your new faucet, do not turn on the supply valves until you have followed these flushing instructions. Rotate the handles to the "ON" position, and remove the aerator of the faucet.

  2. F2

    Open the hot and cold water shut off valves under the sink, and allow the water to run for 15 seconds.

  3. F3

    Finally, turn the handles to the off position and replace the aerator.

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