9
Installation and Start-up
As items are removed from carton, please confirm that all items
required are included in the kit and ready for assembly.
1. Turn off water heater(s).
2. Turn off the main water supply to the home and open an inside
faucet to relieve any pressure within the plumbing system.
3. Place the system in the desired location. Make sure that the
location is level and sturdy enough to support the weight of
the system while in operation.
4. Place the bypass valve in the up flow service position. See
below Bypass Valve Modification Detail.
5. Connect the cold water supply to the inlet of the OneFlow
system. NOTE: The OneFlow system operates in the
UP-flow mode which is opposite of a conventional softener.
Follow the plumbing diagram in Figure 2.
6. Install a supply valve (user supplied) in the supply line and
close it.
7. Place a bucket under the outlet port or run a line from the
outlet port to a drain.
8. Turn the water back on to the house. Slowly open the
supply valve to the OneFlow system. Allow the tank to fill
with water. Close the supply valve when a steady stream of
IN
Cold Water
OUT
OneFlow Treated Water
Figure 2.
OFRES Direction of Flow Diagram -
Shown with Bypass Valve
Service Position
down-flow tank.
As shipped, the bypass is set-up for down-
flow use. The arrow shape of the handles
points in the wrong direction for UP-flow
use. To convert it to UP-flow use, pull up on
the red handles until they come off. Rotate
the handle 180° and put it back on the
valve stem.
Service Position
UP-flow tank.
Bypass Position
UP-flow tank.
Bypass Valve Modification
water comes out of the outlet port. If the outlet is flowing
into a bucket, water could splash on nearby objects. If this
threatens the safety, value, structure, or appearance of these
objects, protect/remove them or use the outlet hose to
drain option. Wait 4 hours for media to “hydrate”.
9. Close the inside faucet.
10. Connect the outlet of the OneFlow system to the cold water
supply to the house. Using the 1" stainless steel reinforced
coupling to connect the outlet plumbing adapter to the 1"
flow meter, install the 1" flow meter in the in this conditioned
water outlet line. The arrow on the flow meter must point in
the direction of water flow. Use PTFE plumbing tape only as
thread sealer on the meter threads.
11. Lift up on tab at bottom center of U-M311 display screen
and separate display screen from base. A small amount
of force will be required for separation due to the internal
interconnecting plug between these two pieces. See page
10 for additional information.
12. Mount the U-M311 monitor base to its mounting surface
then reattach the display screen by aligning the screen and
firmly pressing it back onto the mounting base. Mounting
hardware is provided for drywall mounting. Installer to pro-
vide additional hardware for alternate mounting surface
types. Select mounting location to ensure monitor will not
come into contact with water of any kind. See Figure 3 for
mounting detail.
13. Connect monitor cable to meter cable.
14. Plug monitor transformer into GFCI electrical outlet and
follow the steps for set up and connecting monitor to Wi-Fi.
See page 13 for additional set up information.
15. Open the supply valve to the OneFlow system.
16. Open hot and cold faucets downstream from the OneFlow
system to relieve any air from the plumbing system and
water heaters. Then close the faucets.
17. Check for leaks. Repair as needed.
18. Turn on water heater(s).
The system is now ready for operation.
