INTRODUCTION
Your bar shower valve is a thermostatic mixer which incorporates a thermo-regulating cartridge to assure users of
consistent showering temperatures. The valve has been designed & manufactured to comply with BS EN 1287:1999 &
BS EN 1111:1999.
OPERATING CONDITIONS OF USE
Before installation the operating conditions of use must be checked. The table below contains details of the necessary
conditions of operation. If your water supply cannot meet these conditions then the valve cannot be guaranteed to
operate as a Type 2 TMV2 certified shower valve. This valve is suitable for use in both low pressure (BS 1287) and high
pressure (BS 1111) operating conditions with the following systems:
• Gravity fed Hot & Cold (equal pressures)
• Gravity fed Hot & mains Cold (differential pressure – max ratio 3:1)
• Unvented systems
• Gas combination boiler
• Pumped system
Note: On gravity systems the minimum Vertical distance (Drop) from the underside of the cold water storage tank to the
shower valve must be 3 metres.
CONDITIONS OF USE FOR TYPE 2 VALVES
NOTE:
Valves operating outside these conditions cannot be guaranteed by the Scheme to operate as Type 2 valves.
Recommended outlet temperatures
The BuildCert TMV scheme recommends the following set maximum mixed water outlet temperatures for use in all
premises:
41°C for showers;
The mixed water temperatures must never exceed 46°C.
The maximum mixed water temperature can be 2°C above the recommended maximum set outlet temperatures.
NOTE:
46°C 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.
It is not a safe bathing temperature for adults or children.
The British Burns Association recommends 37 to 37.5°C as a comfortable bathing temperature for children. In premises
covered by the Care Standards Act 2000, the maximum mixed water outlet temperature is 43°C.
The thermostatic mixing valve 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.
The fitting of strainers is recommended as close as is practicable to the water supply inlets of the thermostatic mixing
valve.
HIGH PRESSURE
LOW PRESSURE
Maximum Static Pressure - BAR
Flow Pressure, Hot & Cold - BAR
Hot Supply Temperature - °C
Cold Supply Temperature - °C
10
0.5 to 5
55 to 65
Equal to or less than 25°C
10
0.1 to 1
55 to 65
Equal to or less than 25°C
TROUBLE-SHOOTING
If you require further assistance beyond the guide below contact the help line on 01225 303 900
AFTERCARE INSTRUCTIONS
Whilst this item has a high quality durable finish, it should nevertheless be treated with care. Surfaces should be
cleaned using only a soft damp cloth and clean water & dried using a soft cotton cloth. Bath / shower cleaning
products, even non-scratch ones could damage the finished surface.
MAINTENANCE
We advise that the valves, check valves and filters be regularly serviced particularly in hard water areas. The check
valves along with the filters are contained in the retaining nut. The water supplies must be isolated remotely from the
valve before removal.
TMV2 approved valves shall be tested against the original set temperature results once a year. When testing is due the
following performance checks shall be carried out.
1. Measure the mixed water temperature at the outlet.
2. Carry out the cold fail-safe shut off test by isolating the cold water supply to the TMV, wait for 5 seconds if water is
still flowing check that the temperature is below 46 degrees C.
3. If there is no significant change to the set outlet temperature (+/- 2°C or less change from the original setting) and
the fail safe shut off is functioning, then the valve is working correctly and no further service work is required.
If further maintenance should be required contact Roper Rhodes for details. Please see contact details on the back
page of this document.
Problem
Shower will not run hot enough when first installed
Cold water running back through the valve into the hot water
system.
Solution
Check for debris
Check hot water temperature
Check and clean the check valve cartridges and filters
located under the check valves.
