8
BYPASS VALVE OPERATION
The bypass valve is typically used to isolate the control valve from the plumbing system’s
water pressure in order to perform control valve repairs or maintenance. The 1" full flow
bypass valve incorporates four positions including a diagnostic position that allows service
personnel to work on a pressurized system while still providing untreated bypass water to the
facility or residence. Its completely non-metallic, all plastic design allows for easy access and
serviceability without the need for tools.
The bypass body and rotors are glass-filled Noryl and the nuts and caps are glass- filled
polypropylene. All seals are self-lubricating EPDM to help prevent valve seizing after long
periods of non-use. Internal o-rings can easily be replaced if service is required.
The bypass consists of two interchangeable plug valves that are operated independently by red
arrow-shaped handles. The handles identify the flow direction of the water. The plug valves
enable the bypass valve to operate in four positions.
Refer to corresponding Bypass Valve Instructions on the following page.
Figure 1.
Normal Operation Position: The inlet and outlet handles point in the direction of
flow indicated by the engraved arrows on the control valve. Water flows through the control
valve during normal operation and this position also allows the control valve to isolate the
media bed during the regeneration cycle.
Figure 2.
Bypass Position: The inlet and outlet handles point to the center of the bypass, the
control valve is isolated from the water pressure contained in the plumbing system. Untreated
water is supplied to the plumbing system.
Figure 3.
Diagnostic Position: The inlet handle points in the direction of flow and the outlet
handle points to the center of bypass valve, system water pressure is allowed to the control
valve and the plumbing system while not allowing water to exit from the control valve to the
plumbing.
Figure 4.
Shut Off Position: The inlet handle points to the center of the bypass valve and the
outlet handle points in the direction of flow, the water is shut off to the plumbing system. If
water is available, on the outlet side of the softener, it is an indication of water bypassing the
system (i.e. a plumbing connection somewhere in the building bypasses the system).
