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The bypass valve is 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 a service technician to have pressure to test a system while providing untreated
bypass water to the building. Be sure to install bypass valve onto main control valve, before beginning plumbing
or make provisions in the plumbing system for a bypass. 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 direction of flow. The plug valves enable the bypass valve to operate in four
positions.
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 for normal operation of a water softener or filter. During the regeneration cycle this
position provides regeneration water to the unit, while also providing untreated water to
the distribution system (Fig. 2).
2.
Bypass Position: The inlet and outlet handles point to the center of the bypass. The
system is isolated from the water pressure in the plumbing system. Untreated water is
supplied to the building (Fig. 3).
3. Diagnostic Position: The inlet handle points toward the control valve and the outlet
handle points to the center of bypass valve. Untreated supply water is allowed to flow to
the system and to the building, while not allowing water to exit from the system to the
building (Fig. 4) . This allows the service technician to draw brine and perform other tests
without the test water going to the building.
NOTE: The system must be run through a rinse cycle before returning the bypass valve
to the normal position.
4. Shut Off Position: The inlet handle points to the center of the bypass valve and the outlet
handle points away from the control valve. The water is shut off to the building. The water
treatment system will depressurize upon opening a tap in the building. A negative pressure
in the building combined with the softener being in regeneration could cause a siphoning
of brine into the building. If water is available on the outlet side of the softener it is an
indication of water bypassing the system (Fig. 5)
Figure 2 - Service
Figure 4 - Diagnostic
Bypass Valve
5
Figure 3 - Bypass
Figure 5 – Shut Off
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