Step 6: Tighten the compression fitting

Tightening the compression fitting.
Photo: Kolin Smith
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When tightening the compression nut on the supply line, stop turning just when it begins to draw tight. Then, place a second wrench on the small nut located just above the compression nut, and give the compression nut one last quarter turn. This two-wrench approach will keep the supply hose from turning and twisting as you tighten the compression nut.

Tip: Never use Teflon tape, Teflon paste, or other chemicals on compression threads, as they can lubricate the fitting and cause a leak.
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    Tools List

    • bucket
      Bucket
    • basin wrench
      Basin wrench
    • adjustable wrench
      2 adjustable wrenches
    • flathead screwdriver
      Flat-head screwdriver

    Shopping List

    1. FAUCET

    Usually comes with everything necessary for installation, except braided supply lines.



    2. BRAIDED SUPPLY LINES

    Needed to connect faucets that have rigid tubing.



    3. ESCUTCHEON PLATE

    if necessary, to cover holes in the sink rim or the countertop when replacing a three-hole faucet.