Replacing the Auto Shutoff With a Solenoid Valve on Economy
Reverse Osmosis C/W Booster Pump (Model # EBP75TFC-3SF)
The kit (Part #92374) consists of the following
a) Solenoid Valve 24V (Qty 1)
b) Blue Wire Nuts (Qty 2)
c) Blue ¼” Tubing (9” length)
d) Red ¼” Tubing (14” length)
e) Black ¼” Tubing (19” Length)
f) Pull Ties (2)
g) Elbow ¼” NPT X ¼” Quick Connect
h) Adapter ¼” NPT X ¼” Quick Connect
i) Screw for the mounting the solenoid to the RO Bracket
Please verify that you have received all the components in the kit as described above
Tools Required:
• 11/16” Wrench
• Knife or Wire Stripper
• Phillips Screwdriver
Replacement Instructions
1. Disconnect the booster pump power supply.
2. Unscrew the white compression nut from the membrane housing using 11/16” wrench and disconnect the white tubing.
RO Membrane
Housing
White
Compression
Nut
White Tubing
Disconnected
3. Remove the RO membrane housing from the clips and hang it to the side of the RO Module
#54920 1/11
4. Remove the white tubing from the Auto Shut off as shown below. This tubing is the other end of the tubing removed
from the RO membrane housing. Pull this white tubing out from the RO bracket/module and save it for future use for
this installation.
This is the same tube.
Disconnect Tubing
Auto Shutoff
Valve
Pull this tubing out from the module.
5. Remove the other three white tubings from the auto shut off valve and discard the auto shut off valve.
White Tubing #3White Tubing #2White Tubing #1
Below is what the RO would look like at this step.
6. Remove and discard the small white tube from the high pressure switch.
Auto Shutoff Valve
7. Remove the white tubing connection to the outlet of the booster pump.
Disconnect tube
from Booster
Pump outlet
8. Install the elbow (1/4” NPT X ¼” Quick Connect) supplied to the solenoid valve at the port where the arrow is pointing
towards. Install the adapter (1/4” NPT X ¼” Quick Connect) to the other side of the solenoid valve. Apply Teon tape on
the threads of the ttings. Note the black arrow on the solenoid valve.
Adapter
Fitting
Elbow
Fitting
9. Attach solenoid valve to the bracket with the screw provided. Please refer to the pictures below.
Solenoid Valve
attached to the
Bracket
Attach the
solenoid
with screw
provided.
10. Disconnect the white tubing from the tee as shown. Also disconnect the other end of this white tubing from the inlet of
the booster pump. Discard this white tubing.
Disconnect white
tubing from the tee.
Disconnect white
tubing from
booster pump
inlet.
11. Connect one end of 9” blue tubing to the tee as shown below. Connect the other end of the blue tubing to the inlet of
the solenoid valve.
Blue Tubing
Tee
Blue Tubing
12. Connect the 19” black tubing to the inlet of the booster pump and connect the other end to the outlet of the solenoid as
shown below.
Black
Tubing
Black
Tubing
13. Disconnect the white tubing from the elbow of the middle sump.
Disconnect white
tubing from
middle sump
14. Connect the 14” red tubing to the elbow of the middle sump. Connect the other end of the red tubing to the inlet of the
booster pump.
Red Tubing
Red Tubing
15. Take the white tubing collected from step 4. Connect the tubing (the end without the nut) to the high pressure switch.
Install the RO Membrane housing back to it clips and re-connect the other end of the white tubing to the membrane
housing.
White Tubing
16. Snip the cable ties holding the wires on to the bracket.
Wiring - Please refer to the wiring diagram at the last page. Identify the components as shown below
Solenoid Valve
Transformer
High Pressure Switch
Low Pressure Switch
Booster Pump
17. Locate the black and red wires coming from the pump. Follow these black and red wirers to the connector. On the
other side of the connector cut the two black wires.
Cut these two
black wires.
Two black wires
after the booster
pump.
Red and Black
wires from the
booster pump.
18. Strip all 4 wirers bare.
19. Connect one blue wire and two black wires using the blue wire nut provided. Connect the other blue wire and two
black wirers using the other blue wire nut provided.
BLUE
BLACK
BLUE WIRE NUTS
20. Use a cable tie to bind the wires back together onto the bracket.
21. Reconnect the power supply.
Replacing the Auto Shuto With a Solenoid Valve Wire Diagram
Wiring Diagram
POWER
CORD
WIRE
NUT
SOLENOID
TRANSFORMER
BLACK BLACK
RED
BLACK
CLIP
BLUEBLUE
CLIP
HIGH OR LOW
PRESSURE SWITCH
HIGH OR LOW
PRESSURE SWITCH
Flow Diagram
ADDITIONAL NOTES:
1. FILTER SUMP #1
a. 3 SUMP RO MODELS: PRE-SEDIMENT
2. FILTER SUMP #2
a. 3 SUMP RO MODELS: PRE-CARBON
3. FILTER SUMP #3 - POST CARBON
PRODUCT
WATER CHECK
VALVE
MEMBRANE HOUSING
& RO ELEMENT
REJECT WATER
OUTLET
FLOW CONTROL
MODULE INLET
FILTER
SUMP #2
& FILTER
RED
PUMP
BLACK
WIRE
NUT
DRAIN LINE
TUBING (AIR
GAP FAUCET
MODELS ROUTE
TUBE THROUGH
FAUCET CONN'S)
HIGH PRESSURE
SHUTOFF
SWITCH
FAUCET
FILTER
SUMP #3
& FILTER
WATERGROUP INC. WATERGROUP COMPANIES INC.
FRIDLEY, MN REGINA, SK • CAMBRIDGE, ON
1-800-354-7867 1-877-288-9888
www.watergroup.com
PRESSURE
TANK
BOOSTER
PUMP
SOLENOID
VALVE
LOW PRESSURE
SHUTOFF
INLET VALVE
FILTER
SUMP #1
& FILTER
SWITCH
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