FV669 Rev. G 06/22/22
Page 4
STEP 3.1
Prior to attaching flush valve to control stop(A) inspect and verify
that the O-ring (C) is located within the O-ring groove at the tailpiece.
Ensure the locking nut (D) and locking snap ring (E) are also present
on the tailpiece. See Figure 7.
STEP 3.2
Lubricate O-ring with water and carefully insert flush valve tailpiece
into the control stop valve to ensure O-ring remains seated. Tighten
locking nut using a smooth jawed wrench. See Figure 8.
Flush Valve Installation - STEP 3
STEP 3.3
Determine the length of vacuum breaker tube required to join the
flush valve and fixture spud, and cut if necessary.
STEP 3.4
Slide the tube nut, spud nut, slip gasket, rubber gasket and spud
escutcheon over the vacuum breaker tube and insert tube into
fixture spud. Hand tighten tube nut to valve body and hand
tighten spud nut onto fixture spud. Adjust the valve assembly for
plumb. Tighten fixture spud nut, vacuum breaker tube nut and
lock nut with a wrench.
Adjust and plumb the valve assembly. Tighten all connections with
smooth jawed wrench and turn on water supply at the control stop.
See Figure 9.
DO NOT
use pipe sealant or plumbing grease on any valve
component or coupling with the exception of the Control Stop
Inlet! Ensure Vacuum Breaker does not twist or warp when
tightening Vacuum Breaker Tube Nut.
DO NOT
cut vacuum breaker tube shorter than 6” below
the -C-L- indicator mark, as vacuum breaker must be 6” above
the fixture. Consult plumbing Codes & Regulations for specific
details.
B
A
E
C
D
A
B
D
Vacuum Breaker
Tube Nut
Spud Nut
Slip Gasket
Rubber Gasket
Spud Escutcheon
-C-L- Indicator
Figure 7
Figure 8
Figure 9
When installing the valve with the control stop on left side of the
valve, continue to install with the sensor facing the wall. After Step
3.4, go to the Sensor Angle Adjustment Section before advancing
to Step 4 - Battery Installation.
