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 illustrations 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).
9
