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Idiomas disponibles
Idiomas disponibles
Horizontal Installation
Maintaining the Check Modules
2
/
" – 6"
1
2
Figure A
Figure D
WARNING
!
Before servicing any Watts valve, shut down the water
system by closing both the inlet and outlet shutoff valves.
This is mandatory. After shutoff valves are closed, open
test cocks No. 2, No. 3, and No. 4 to relieve pressure within
the backflow assembly.
1. After test cock No. 3 has been opened to relieve pressure,
remove the test cock from the housing. (See Figure A.)
2. Insert a #3 screwdriver through the hole on the top of the
cover sleeve and, using both hands, rotate the cover sleeve
approximately a quarter turn clockwise and a quarter turn
counterclockwise to break the sleeve O-ring seals. Using the
screwdriver, slowly slide the cover sleeve to the downstream
side of the housing. (See Figure B.)
3. Remove the stainless steel check retainer from the housing.
(See Figure B.)
4. Remove check module No. 1 by inserting two flat blade screw-
drivers into the slots on either side of the check module. (See
Figure C.) Gently pry the check module toward the open zone.
5. Repeat step 4 to remove check module No. 2. (For servicing
6" checks, see the maintenance instructions for valve sizes
8" to 10".)
2
N Pattern
Figure B
Figure E
6. To clean or inspect either check module, insert a #3 screw-
driver through the downstream side of the check module.
(See Figures D and E.) When the screwdriver is in place,
remove the E-clip and the pin connecting the structural members.
(See Figure F.) The check clapper opens with no tension.
7. Clean the seating area thoroughly. The sealing disc can be
removed, if necessary, by detaching the screws connecting the
keeper plate to the clapper. The sealing disc can be reversed
and reinstalled if the elastomer is cut or damaged.
8. Wash check module and O-ring then inspect for any damage.
If damaged, install new parts during reassembly.
9. After a thorough cleaning, lubricate the O-ring with an FDA
Approved lubricant, replace the pin and E-clip in the structural
members, remove screwdriver, and reinstall the check modules.
Reverse the order of these steps to reassemble the parts
and housing.
Vertical Installation
Figure C
Figure F
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