13
Disassembling the valve for cleaning or part replacement
— Disassembly Procedure A
To inspect the inside of the valve for cleaning or replacement of the diaphragm
use the following procedure:
1. Shut off the water at the master shut off valve.
2. Unscrew all bonnet screws. On some models, the bleed screw and/or flow control
knob will also need to be removed.
3. Remove bonnet assembly to expose the spring, diaphragm, and rubber gasket (if
any) and filter (if any). Remove and inspect the spring, diaphragm, and rubber gas-
ket for wear or damage. Inspect the diaphragm for clog or a tear in the small hole
on its surface.
4. Inspect the valve body for dirt on the diaphragm seat.
5. Inspect the bonnet for dirt clogging the small bleed port near the solenoid.
6. Rinse dirt off if necessary, or use a wire to gently dislodge dirt from the bleed port.
7. Install new diaphragm if necessary. Do not forget to replace the spring. Some new
replacement diaphragms are an all-in-one design and do not have a separate rub-
ber gasket to install. Be sure that the holes line up.
8. Press the bonnet firmly back in place. Replace the screws and tighten. Pressure
test the valve to assure that all of the screws are tight enough to prevent any water
leakage between the valve body and bonnet.
To replace the solenoid:
1. Unscrew the solenoid.
2. Check for debris clogging the small port where the solenoid seats.
3. Rinse off the solenoid to remove debris.
4. Check condition of solenoid O-ring.
5. Replace solenoid if necessary with part number applicable to your particular
model.
Model Solenoid P/N Diaphragm P/N
CP-075 or-100 208484 209391
EV-100 EV-100F 407200 407303
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