The Cotherm TSR 11″ Dual Function Rod Thermostat (TSR00014) is designed for precise temperature control and safety in unvented water systems. Featuring an adjustable trip, safety cut-out, and durable design, it ensures reliable performance. CE marked and approved, it is compatible with Fabdec Excelsior, Glow Worm Hydracyl, Vaillant Aurostor, and Aurotherm systems.