DIY Doctor

Thermostatic shower

Postby GARYF » Sun Jun 17, 2007 8:27 pm

Hi, i have a Vokera combi boiler and want to fit a thermostatic shower. As the cold water is direct from the mains and the hot from the combi, will this be a problem?

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Simply Build It

Postby plumbers1 » Sun Jun 24, 2007 8:15 pm

Most good quality shower valves eg mira excel will have a balancing washer/restrictor that will need to fitted. this will balance the pressure and volume of the cold supply versus hot supply volume.
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Postby DONFRAMAC » Mon Jun 25, 2007 1:40 am

Thermostatic (blender) showers, need both hot & cold pressures to be equal, and combi-boilers are not known for giving enough flow for showers, even if you went to the trouble of fitting a cold header-tank in the loft just to feed your shower;-- you would just be plagued by chilly spells during showers, whenever another hot water outlet opened ( Kitchen sink or washing M/C).
A high-power electric shower, perhaps incorporating a pump, seems a reasonable way forward.
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