– 10 –
2.9 Air-Gap Faucet Installation
(Figure 8)
Air-Gap Faucets are sometimes required by municipal code. The faucet is
designed to take the waste water from the membrane to the top of the sink
and then let it flow by gravity to the drain saddle. The objective is to prevent
possible backup of drain water from the sink to the membrane in the event of
a sink clog. A drain saddle with 3/8" instead of 1/4" is used. An extra section
of 3/8" tubing (black) is used from the faucet to the drain.
Sink Preparation
Drill the appropriate size hole in the kitchen sink to accommodate the air-gap
faucet.
Drain Connection
Follow instructions of section 2.5 except drill a 3/8" hole in the drain pipe.
Tubing Connections
Find the black colored 1/4" drain line from the membrane. Connect this tube
to the 1/4" barbed fitting on the air-gap faucet.
Find the 3/8" black tubing in the parts kit. Connect this tube to the 3/8" barbed
fitting on the air-gap faucet. Install the faucet assembly (with tubes attached)
into the sink hole. Secure the faucet per instructions in section 2.8. Re-attach
the 1/4" black tubing to the drain side of the RO membrane housing. Attach
the 3/8" tube to the drain connector. Tighten the fitting nut securely. Attach the
pure water line to the faucet per the instructions in section 2.9-D.
Note:
To reduce drain noise gently curve the black tubing from the air-gap
faucet to the drain connection.
Figure 8
Escutcheon Plate
Black Rubber Washer
Black Locating Washer
3/8” drain line
from Airgap to
Drainsaddle (blue)
Drain line 1/4” from RO
to Airgap (black)
3/8” Tubing (white)
Faucet Adapter
Nut
Lock Washer
Counter Top
Small Rubber Washer
