Thermastat replacement
www.showerdoc.com/ultra-group-therm-cartridge-sa30049
You may be able to ID it from the image and comparing it to the one you have .
www.showerdoc.com/ultra-twin-control-thermostatic-shower-valve-shower-spares
If it isn't the same one then you will have to remove the existing one and send the photos to us for identifacation.
Depending on the system you have you should be able to turn the water off in the attic by the cold water storage tank or the main supply comping into your house
Answered 8 years ago by Anonymous
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Ultra Showers Twin Control Thermostatic Shower Valve Shower Spares
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