The Schuller Pipe & Cylinder Thermostat is a practical surface mounted mechanical thermostat which permits the user to control the temperature of an uninsulated and foam lagged domestic hot water cylinder. It is provided with an additional strap which enables it to be alternatively applied as a pipe thermostat. A sachet of heat conducting paste is supplied which must be spread between the back face of the thermostat and the bare surface of the pipe or cylinder, to ensure accurate temperature control. The unit can be used to switch a circulating pump, boiler or motorised zone control valves. At the time of order specify the appropriate fixing strap required.