HIGH PRESSURE MIXER
SHOWERS
We have come across numerous instances where owners of combination boilers have been told they cannot have a shower installed that utilizes the boilers hot water. This is simply not true. What is true is the fact your options are limited and power showers
are not feasible, due to the use of booster pumps.
High Pressure Thermostatic Mixer Showers
Minimum running water pressure: 1 bar
Maximum running water pressure: 5 bar
Maximum static water pressure: 10 bar
Whilst the mixer valve is operational (open outlet), inlet pressures must not be capable of exceeding 7 bar static pressure. For effective operation of internal seals the maximum static pressure must not be exceeded.
 Pressure reducing valves suitable for individual site conditions should be fitted on installations which exceed the above specifications.
For optimum performance within the specified running pressure range, a minimum flow of 8 litres per minute should be available to both inlets.
For correct operation of a thermostatic mixer valve shower both hot and cold water supplies to the unit must be at nominally equal pressures. The pipe work should be installed such that the flow is not significantly affected by other taps and appliances being operated
elsewhere on the premises. Suitable for use with fully modulating combination and multi-point boilers, high output thermal store units, unvented and high pressure pumped systems.
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