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 p
ressures)
• Gravity fed Hot & mains Cold (di
fferential 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 temperatur
es must never exceed 46°C.
The maximum mixed water temperatur
e can be 2°C above the
recommended maximum set outlet
temperatures.
NOTE:
46°C is the maximum mixed water temperatu
re 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 r
ecommends 37 to 37.5°C as a comfortable bathing temperatu
re for children. In
premises cover
ed by the Ca
re Standards Act 2000, the maximum mixed water outlet temperatur
e 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.
SERVICE INTERVALS
Subsequent f
r
equency can be determined with
reference to previous test results. Where no significant deviation
was recor
ded the test interval can be made equal to the maximum
recorded interval to that point.
Note. Check valve and strainer servicing must be conducted at each test interval.
If the recorded mixed water temperature is greater than > 2°K from the initial recorded settings or the set point
cannot be reached / stabilised further action is r
equi
red.
It is important to establish that the incoming water supplies still satisfy the initial guidance and also that no
additional draw off variation that could affect performance has occurred.
The material selection for this valve has excellent resistance to scale build up and is designed such that there
are no serviceable parts beyond items 1 & 2 as described previously.
In the very unlikely event that initial performance cannot be achieved, and all external parameters are correct,
the unit may r
equi
re replacement.
10-YEAR GUARANTEE
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
We have complete confidence in this Tavistock product and as such it is offered with a 10-year guarantee
against defects in manufacture. This valve must be fitted by a competent installer. If in doubt seek advice from
a qualified professional.
The guarantee requires that this product be used in the manner for which it was intended and that it is installed
& maintained in accordance with the fitting instructions and local water bylaws. The guarantee covers products
in domestic use only.
Always ensure this product is fully tested before concealing valves into the wall. On installation ensure that the
valve and valve inlet threads can be removed or serviced in accordance with TMV2 regulations. The guarantee
is invalidated should the valve be damaged by water borne debris. Make sure that supply pipes are clear of
any debris prior to installation, this is particularly important on new plumbing installations. In the unlikely event
that this product should fail during the guarantee period we will either replace the faulty part or the complete
unit as appropriate.
This guarantee excludes normal wear and tear. This guarantee covers failure of the thermostatic cartridge
within the first 2 years of purchase only. Replacement cartridges are available to purchase by contacting the
Tavistock Customer Service team. Failure to follow the terms outlined above will invalidate this guarantee.
Proof of purchase will be required to validate any guarantee claims.
