4
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
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. During
the regeneration cycle this position provides regeneration water to the unit, while also providing untreated water to the
distribution system
(Fig. 1)
.
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. 2)
.
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. 3)
. 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 rinsed 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. 4)
(i.e. a plumbing cross-connection somewhere in the building).
NORMAL
OPERATION
POSITION
BYPASS POSITION
DIAGNOSTIC
POSITION
SHUT OFF
POSITION
FIGURE 1
FIGURE 3
FIGURE 2
FIGURE 4
BYPASS VALVE:
