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3) Drill a pilot hole using 1/4" carbide tipped pilot drill bit.
4) Drill at a slow speed to avoid cracking and chipping.
5) Using a porcelain cutter, drill out 1/2" hole. Keep the drill speed on the slowest speed and use lubricating oil to keep the
drill bit cool.
Note: Air Gap faucets require a 7/8" hole.
6) Remove all sharp edges with a file.
7) Make sure the surroundings of the sink are cooled before mounting the faucet.
Mount the Faucet
1) Slide the 1-1/4" faceplate, rubber washer, and the 1-7/8" rubber gasket onto the faucet stem.
2) Place the stud through the hole in the sink or counter top, and properly position the faucet.
3) From under the counter, slide on the black plastic washer and the metal star washer, and screw
on the faucet lock nut.
4) Tighten securely.
5) At the bottom of the faucet stem, securely tighten the John Guest® faucet connector (provided
in the Parts Packet with your system).
Note: Any remaining faucet parts are replaced by the John Guest® faucet connector and can be
discarded.
Step 3: Install Valve to Feed Water Supply
Locate the cold water supply shut-off valve, and turn it off. Open the cold water sink faucet to release any water and pressure. On
single handled faucets, the hot water may have to be turned off to prevent any hot water crossover. If water continues to come out
of the faucet, with the valve turned off, the main house line may need to be turned off.
The following instructions describe the installation of three different types of valves that can be used on a feed water supply line.
Please take note of which valve you are using, follow those instructions carefully, and skip the step details for the other valve
options.
CAUTION: Do not connect the feed water valve to the hot water pipe. Hot water will severely damage your RO membrane. The
connection must be made with the cold water line.
If Using John Guest® Angle Stop Adapter Valve (Optional)
The John Guest® Angle Stop Adapter Valve has been designed to easily tap
into the cold water supply, right in between the cold water supply valve and
the existing riser faucet line. Installation is fast and easy, without the need
to pierce the feed line.
1) Be sure the water supply is off.
2) Disconnect the riser from the brass/chrome cold water supply valve.
3) Visually inspect the angle stop adapter valve to ensure that the sealing gasket is
properly seated in the female threads.
4) Screw and securely tighten the angle stop adapter valve to the cold water supply
valve.
5) Screw and securely tighten the riser to the angle stop adapter valve.
6) Leave the valve closed at this time.
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