8
Step B - Install RO Drain Under Sink
INTRODUCTION
A suitable drain point is needed for the drain water from
the Reverse Osmosis filter. You have two options:
• Install the Drain Adaptor included with your unit
As shown in Figures 7-9, the drain adaptor is
installed onto your sink’s drain pipe above the P-trap.
This is normally used for under sink installations.
• Use another existing drain in your home
As shown in Figures 10 and 11, the drain tube from
the RO filter runs directly to an open drain. This is
often used for remote location installations.
NOTE: An incorrectly connected drain point can
cause water to leak from the faucet’s air gap.
NOTE: Local code may restrict the type of drain
installation to use. Either drain installation type, if
permitted by code, may be used in under sink or
remote location installations. Consult a plumber if
you are not familiar with plumbing procedures.
INSTALL DRAIN ADAPTOR
(Under sink Installation)
The drain adaptor included with your RO system is
designed to fit around a standard 1-1/2” O.D. drain
pipe. In the following procedure, you will install the
drain adaptor above (upstream of) the P-trap. See Fig.
7 & 9. Be sure to comply with local plumbing codes.
NOTE: Before starting this procedure, inspect the
drain pipe under the sink for corrosion, and replace
if necessary, before continuing with installation.
1
. Test fit the two halves of the drain adaptor onto the
sink drain pipe, about 6 inches above the P-trap
(See Fig. 8). Make sure that the Q.C. fitting is
toward the direction of the RO faucet (See Fig. 9).
NOTE: Locate so that the drain tubing from the
Reverse Osmosis faucet will run straight to the
adaptor, with no dips, loops, or kinks.
2
. Using the hole through the drain fitting as a guide,
mark the pipe where a 3/8” hole will be drilled (See
Fig. 8), and remove the drain adaptor from the pipe.
NOTE: Do not drill through the drain adaptor’s
Q.C. fitting, as this could damage the o-ring.
3
. Drill a 3/8” dia. hole in the pipe and remove flash.
4
. Clean the sink tailpiece to assure a leak-tight fit.
5
. Place the halves of the drain fitting back onto the
sink drain pipe. Use a pencil or similar pointed
object to align the Q.C. fitting so that it is centered
on the hole you drilled.
6
. Assemble the nuts and screws, as shown in Figure
9, and tighten both sides equally to secure the drain
adaptor halves onto the pipe. Do not overtighten.
7
. Do not connect black tubing to the Q.C. fitting at this
time. It is done after the RO faucet is installed.
FIG. 7
P–Trap
Single Basin
Sink
Double Basin Sink
Under the Sink Installation
Drain
Adaptor
Drain
Adaptor
Garbage
Disposal
FIG. 9
IMPORTANT: Do not install drain adaptor below the P-Trap.
Locate drain adaptor so that when the black
drain tube from the Reverse Osmosis Faucet
is installed it will run straight to the adaptor,
with no dips, loops, or kinks.
Black Drain
Tube
P–Trap
Drain Adaptor
HOT
COLD
FIG. 8
Nuts
Sink Drain Pipe
Screws
3/8” Quick
Connect
Fitting
Drain
Adaptor
Halves
P-Trap
3/8” Hole -
Do not drill
through Q.C. Fitting
RO Faucet
P–Trap
Do not install drain
adaptor on a line coming
from a garbage disposal
