| Symptom |
Cause |
Corrective
action |
| Hot water at the cold taps |
a) Operation of the insert
check valve is hindered: check valve is not sealing correctly.
b) Check valves not fitted. |
Replace faulty check valve. |
| Fluctuating mixed water
temperature |
a) Erratic supply
temperatures at the inlet of the valve.
b) Starvation of the water supplies at
the inlets of the valve.
c) Incorrect commissioning of the valve. |
Restore inlet conditions
within the limits of the valve. |
| Erratic flow of water from
the valve |
a) Insufficient water
supplies.
b) Fluctuations in supply
pressures/temperatures.
c) Adverse effect created by other draw
off points on the system. |
Stabilize inlet supply
conditions. |
| No flow of water from the
valve |
a) In-line filters blocked.
b) Insufficient supply pressures.
c) Debris obstructing valve operation. |
Clean filters.
Restore inlet supplies.
Clean debris or scale from valve. |
| Valve does not shutoff when
tested |
a) Installation not in
accordance with our recommendations.
b) The minimum temperature differential
not achieved.
c) Internal mechanism hindered by
debris. |
Install as outlined in the
instructions.
Raise hot water temperature.
Clean debris or scale from valve. |
