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CONNECT TUBING
NOTE:
• Follow instructions from "Using Push-to-Connect
Fittings" (page 7) when connecting tubing to fittings.
• At the connections ensure the tubes are cut as
straight as possible.
• Elbows are included in the optional floor stand
kit to keep the tubing from bending too much,
therefore preventing leaks.
• Locate the tank close to the processor, a distance
of 10 feet or less.
Inlet Tubing Connections (3/8" Green Tubing)
1. Install 3/8" green tubing to FEED WATER IN port at
bottom of RO processor.
2. Turn off incoming water supply at valve. Apply three
wraps of PTFE tape to NPT threads of 1/2" NPT x 3/8"
push to connect. Screw in fitting to NPT threads on
water supply valve; hand tighten and tighten to no
more than 2ft lbs of torque. Leave enough tubing
for servicing and cut tubing to length. Insert other
end of 3/8" green tubing to 3/8" PTC fitting installed
on incoming water supply.
Drain Tubing Connections (1/4" Black Tubing)
3. Install 1/4" black tubing to REJECT WATER OUT port.
4. Cut tubing to length and install the other end of the
1/4" black drain tubing to an air gap compliant with
local codes.
Air gaps are available from Pentair.
(optional part no. 164-89905)
5. Install the air gap to a drain pipe. Securely fasten
tubing as permeate pump will cause drain line to kick.
To Tank Tubing Connections (3/8" Blue Tubing)
6. Install 3/8" blue tubing to the TO TANK port on the
RO processor.
Install Tee with Tank Sampling Valve
7. Install a tee with a sampling valve in a convenient
location on the 3/8" blue line you just installed. This
will be used to sample the water going to the tank and
used for flushing the cartridges. Make sure the valve is
closed and the end of the tube stays clean.
8. Run other end of 3/8" blue TO TANK tubing to sink or drain.
• Connection to ATM tank will follow flushing
process.
NOTE: Make sure outlet tubing will not come dislodged
from drain or sink. Water flow rates can cause the
tubing to kick.
PENTAIR EZ-RO INSTALLATION AND OPERATION GUIDE
1
3
5
tank
tank
sampling
sampling
tee
tee
valve
valve
(closed)
(closed)
7
TDS monitor placement option:
The TDS monitor can be removed from the side
position and attached with hook and loop fastener
(provided) to the front of the processor.
2
4
6
8
FOODSERVICE.PENTAIR.COM | 9
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