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Installation
Tighten the Tank Head
NOTICE
Check the head on top of the tank. It is common for it to loosen during
shipment. Tighten the head with a strap wrench as needed.
NOTICE
Models OF1465-50TM and OF1665-75TM Only
*It is very important to use fl exible connections on the inlet and
outlet plumbing in the horizontal orientation as shown in the images
on this page. The tanks expand and contract with water pressure
fl uctuations. Flexible connectors will prevent plumbing and tank
leaks. The EDP code for the suggested Watts 2" Flexible Connec-
tors is C515285 (Two are included and required for installation).
Models OF1354-30TM, OF1465-50TM and OF1665-75TM
Anytime OneFlow
systems are installed above the ground fl oor
®
of a building it is recommended that a vacuum relief valve also
be installed to protect against tank collapse in the event the
plumbing system is drained. If a vacuum relief valve is not used
then the system should be placed in bypass anytime the plumbing
system is drained. The EDP code for the suggested vacuum relief
valve is 0556031 (not included). The vacuum relief valve should be
installed on the outlet of the system.
NOTICE
• We recommend the installation of a dual-union ball-valve on the
inlet and outlet to isolate the tank for servicing.
• A full bypass should be installed so that the full service fl ow can
be routed around the system as needed for servicing.
Install Piping
Connect the inlet and outlet plumbing according to your preferences
and any applicable local codes. Include sample/drain ports with
hose-bibb connections on the inlet and outlet piping to facilitate
startup and service.
!
WARNING
Support the Piping
2 inch Flex Connectors must be installed horizontally not vertically
in the water pipe line. The full weight of the piping and valves must
be supported by uni-strut, pipe hangers or other means. The tank
connections cannot support the weight of the piping. The installation
image on this page for a multi-tank system installation shows
properly supported piping.
Typical Installation for Single and
Multi-Tank Systems
Outlet
Vacuum Relief Valve
Inlet
OF1354-30TM
Vacuum Relief
Valve
2" Flex
Connectors*
Inlet
OF1465-50TM & OF1665-75TM
Start-Up
Connect a hose to the hose bibb on the outlet of the tank. Run the
hose to a drain and open the hose bibb.
Slowly/partially open the supply water ball valve. Allow the tank to
slowly fi ll with water. When a steady stream of water appears at the
drain, close the supply valve and hose bibb. Once the tank is full, wait
4 hours for media to "hydrate".
Open the inlet and outlet valves on the system. Close the bypass
valve. Open a nearby faucet downstream from the OneFlow
to relieve any air.
Check for leaks. Repair as needed.
NOTICE
Fill in install date and rebed due date on product label located on
front of each tank as reminder to replace OneFlow media every
3 years.
The system is now ready for operation.
4
Vacuum Relief Valve
Inlet
2" Flex
Connectors*
OF1465-50TM/OF1665-75TM
Pipe Hangers
Outlet
®
Outlet
system
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