Step 8: Connect the filter's water-supply tubing

Connecting the tubing
Photo: Kolin Smith
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Attach a compression fitting onto the end of the plastic tubing that's connected to the inlet side of the filter.

Thread the compression fitting onto the reducer that's attached to the cold-water supply line; tighten the fitting with a wrench while holding the reducer with pliers.

Connect the other length of tubing to the outlet side of the filter and to the faucet stem, using a compression fitting.

Open all the shutoff valves and check your work for leaks.

Remove the aerator from the sink's faucet and turn on the cold water for a minute or two to flush out any flux.

Finally, open the filter faucet and let it run for five minutes to remove air and carbon particles from the cartridges.
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    Tools List

    • drill
      Drill/driver with step-drill bit,
      to drill hole in sink top
    • propane torch
      Propane torch
    • emery cloth
      Emery cloth,
      for cleaning pipe prior to soldering
    • adjustable wrench
      Adjustable wrench
    • tongue-and-groove pliers
      Tongue-and-groove pliers
    • tubing cutter
      Close-quarters tubing cutter
    • basin wrench
      Basin wrench,
      to tighten hex nut that holds filter faucet to sink top
    • copper fitting brush
      Copper fitting brush (for cleaning copper tubing and fittings
    • 16-foot tape measure
      Tape measure
    • eye goggles
      Eye goggles
    • centering punch
      Center punch,
      to strike a starting point on stainless steel sink deck prior to drilling

    Shopping List

    1. WATER FILTER KIT

    2. LEAD-FREE SOLDER AND PIPE FLUX

    3. 1/2-INCH COPPER TEE

    4. SEVERAL FEET OF 1/2-INCH COPPER TUBING

    5. 1/2-INCH FEMALE ADAPTER

    6. 1/2-INCH TO 1/4-INCH REDUCER

    7. 1/2-INCH BALL VALVE

    8. TEFLON TAPE

    applied to reducer before threading onto female adapter



    9. TARP OR BLANKET

    to protect kitchen floor



    10. FIRE-RESISTANT CLOTH AND FIRE EXTINGUISHER