TESTING AND ANNUAL SERVICING
It is recommended that showers do not exceed 44°C. The valve temperature should never exceed 46°C.
After commissioning, carry out the cold failure test to ensure the valve operates at the correct outlet
temperature.
The valve should be tested to ensure correct operation during installation and thereafter at stated
intervals decided by the user but never at greater than 12 monthly intervals. The testing will only require
a normal thermometer with a scale greater than 65°C. The temperature sensitive element of the
thermometer should always be fully inserted into the water flow.
Follow the procedure below:
1. Measure the mixed water temperature.
2. Carry out a cold fail/safe shut-off test by using the mains isolation valve to shut off the water to the
cold supply. Wait 5 seconds, if water is still flowing check that the water temperature is below 44°C. The
flow should stop or reduce to a trickle.
3. Open the cold water isolation valve and measure mixed water temperature. If there is no significant
change from the original settings and fail/safe shut off is functioning the valve is working correctly and
no further service is required. If the outlet temperature has drifted by more than 2°C, or if the fail/safe
function does not work, a full service or re-commissioning is required. We recommend that in these
circumstances you contact a plumber.
