Install Instructions
4
Material–Tool Requirements:
• #3 Phillips screwdriver or
5
/16" diameter rod, length sufficient
to span diameter of check, see Figures A and B.
•
1
/2 – 13 x 5 fully threaded hex bolt (Service bolt).
•
3
/4" open end or socket wrench.
Instructions
Prior to servicing any Watts valve, it is mandatory to shut
down the water system by closing both the inlet and outlet
shutoff valves. After shutoff valves are closed, open test cock
#2, #3 & #4 to relieve pressure within the backflow assembly.
1. After #3 test cock has been opened to relieve pressure,
remove #3 test cock from housing.
When repairing an 8" or 10" (200 or 250mm) device, remove
both Victaulic couplers from body. Slide the downstream
Victaulic coupler gasket to the downstream side of the hous-
ing. The upstream Victaulic coupler gasket stays in place.
2. Remove checks that are to be maintained.
3. Locate the service hole and thread in the service bolt by hand
until it contacts the linkage. (Figure A)
4. Continue to thread in service bolt with the wrench until the
service hole in the linkage is aligned with the service notches
on the spring arbors. (Figure A)
5. Insert the Phillips screwdriver through the arbors and service
hole of the linkage making sure that the tip of the screwdriver
extends past the ends of the arbors by a minimum of
1
/4"
(6mm). (Figure B)
6. Back out the service bolt until load is transferred to the
screwdriver. Continue to back out the service bolt until
sufficient clearance is achieved to remove the complete
spring mechanism.
7. To disconnect linkage, remove retaining clip and pin (store
in a safe location for reinstallation).
8. To remove spring mechanism, grasp the screwdriver at the
center and pull complete assembly straight out and store in
a safe place.
9. Reinstall in reverse.
WARNING – While the spring mechanism is removed for check
servicing; never pull the screwdriver out or off the support
notches on the arbors. Doing so may cause bodily injuries.
Maintenance Instructions 8" – 10" (200 – 250mm)
Figure A
Figure B
Service Hole