Installation Requirements
12
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Conditions of use for Type 2 (Thermostatic mixer) valves
High Pressure
Low Pressure
Maximum Static Pressure (Bar)
10
10
Flow Pressure, Hot & Cold (Bar)
0.5 to 5
0.1 to 1.0
Hot Supply Temperature (ºC)
55 to 65
55 to 65
Cold Supply Temperature (ºC)
Equal to or less than 25
Equal to or less than 25
Code
Operating Pressure
Application
HP-SE
High Pressure
Shower
LP-S
Low Pressure
Shower
This valve has been approved for use in the following
designations;
If a water supply is fed by gravity then the supply
pressure should be verified to ensure the conditions of
use are appropriate for the valve.
Note: Valves operating outside these conditions cannot
be guaranteed by the Scheme to operate as Type 2
valves.
The valves designation of use, LP if testes against BS EN
1287, HP if tested against BS EN 1111 and HP & LP if
tested against both standards.
If a water supply is fed by gravity then the supply
pressure should be verified to ensure the conditions of
use are appropriate for the valve
.
Minimum supply pressure for LP Tub application is 0.2
bar.
Recommended Outlet temperatures
We recommend the following set maximum mixed water
outlet temperatures for use in all premises:
41ºC for showers;
The maximum mixed water temperature can be 2ºC
above the recommended maximum set outlet
temperatures.
Note: 46ºC is the maximum mixed water temperature
from the bath tap. The maximum temperature takes
account of the allowable temperature tolerances
inherent in thermostatic mixing valves and
temperature losses in metal baths.
Warning: It is not a safe bathing temperature
for adults or children.
The British Burns Association recommends 37 to
37.5ºC as a comfortable bathing temperature for
children. In premises covered by the Care Standards
Act 2000, the maximum mixed water outlet
temperature is 43ºC.
The thermostatic mixing valve (TMV) will be installed in
such a position that maintenance of the TMV and its
valves and the commissioning and testing of the TMV
can be undertaken.
Note: The frequency of In-Service tests – 1 year max.
The fitting of isolation valves is required as close as is
practical to the water supply inlets of the thermostatic
mixing valve.
The fitting of strainers is recommended as close as is
practicable to the water supply inlets of the
thermostatic mixing valve.