Timeguard-TRT044-Cylinder-Pipe-Thermostat-Timeguard-TRT044-P-The-TRT044-is-a-surface-mounted-mechanical-thermostat-used-to-control-the-temperature-of-domestic-hot-water-cylinders-uninsulated-&-foam-lagged-The-unit-comes-complete-with-a-cylinder-strap-&-a-wire-strap-which-enables-the-unit-to-be-used-also-as-a-pipe-thermostat-The-TRT044-can-be-used-to-switch-a-circulating-pump-boiler-or-most-common-zone-valves-It-can-also-be-used-for-switching-domestic-13A-immersion-heate