Richard Hurst FCIPHE, IEng, IMarEng, MIMarEST says that the most effective measure to prevent scalding is by limiting the outlet temperature of the hot water, and the best device to do this is the thermostatic mixing valve (TMV).
“It is important that the valves are installed in a system where the limits of operation are known.”
"Warning! Thermostatic mixing valves MUST be maintained every 12 months."
