4
Vacuum Relief Valve
Outlet
Inlet
2" Flex
Connectors*
Typical Installation for Single and
Multi-Tank Systems
Outlet
Inlet
Pipe Hangers
2" Flex
Connectors*
Vacuum Relief
Valve
Installation
Tighten the Tank Head
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
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 fill 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
®
system
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.
Models OF1465-50TM and OF1665-75TM Only
*It is very important to use
flexible 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
fluctuations. 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 OF1260-30TM, OF1465-50TM and OF1665-75TM
Anytime OneFlow
®
systems are installed above the ground floor
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
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.
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.
• 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 flow can
be routed around the system as needed for servicing.
NOTICE
Outlet
Inlet
Vacuum Relief Valve
OF1260-30TM
OF1465-50TM & OF1665-75TM
OF1465-50TM/OF1665-75TM
