FV486 Rev. D 7/16/18
Page 3
1. Remove control stop cover button or cover and use a slotted
screwdriver to close water supply control screw (counterclockwise
rotation). Push handle to relieve pressure in the flushometer’s upper
chamber and to assure water is completely shut off. Water supply
control screw must be turned tight to shut off water.
1
2
2. Remove existing manual flushometer chrome cover and plastic cap
and remove the internal parts assembly. Remove manual flushome-
ter handle assembly. Be sure gasket is removed with hand assembly.
Discard
Discard
Gasket
Handle
Assembly
3. Remove blue solenoid valve cap. Attach Zurn RetroFlush sensor
assembly with gasket to the handle port of the flushometer. Hand
tighten new handle nut - positioning hole (J) to top. Remove blue
filtered riser tube cover. Insert Zurn RetroFlush filtered riser tube
(K) from the top of the flushometer and screw into solenoid valve
- snug with screwdriver.
Do not overtighten
.
Hand turn end
with threaded
hole so hole is
positoined at top.
J
K
4. Assure riser tube is vertical. Insert new Zurn RetroFlush internal dia-
phragm kit. Diaphragm kit will slide over riser tube and seat in valve.
Replace original plastic cap and fully tighten original brass cover.
3
ZRK
ZRK-DF
New
RetroFlush
Diaphragm
Kit
Riser Tube
4
Shown with ZRK-DF
