A possible cause of lost pressure, especially if the
pressure decreases as the temperature increases, is
debris clogging the filter screens on the thermostatic
cartridge. If this occurs, the screens should be
cleaned.
Turn the water off at the main.
Remove the handle.
Hold the thermoelement steady with a 36 mm
wrench. Use a 24 mm wrench to unscrew the ther-
mostat cartridge from the thermoelement.
Clean the Thermostatic Cartridge Filters
Clean the filter screens under running water. An old
toothbrush may be used if care is taken not to dam-
age the filter screens.
Reinstall the thermostat cartridge.
Check Valve Maintenance
The check valve should be removed and inspected
yearly.
If the check valve is damaged, it should be replaced.
16
filter screens
check valve
