Ensure incoming and stored water remains at a temperature of less than 20 °C, eg if necessary site storage tank in a cool place and provide insulation.
Check water temperature at sentinel outlets on monthly basis.
Hot water pipes
Check flow and return temperatures at calorifiers.
Thermostatic temperature valves
If thermostatic mixer valves (TMV’s) are fitted, measure temperature at the hot water inlet to the TMVs.
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