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Maintenance

Water Temperature & Flushing Log

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  • Run little-used taps, showers and outlets weekly for several minutes to stop water sitting and stagnating
  • Check hot water reaches 50°C or above at the tap within one minute of running, and record the reading
  • Check cold water stays below 20°C at the tap within two minutes of running, and record the reading
  • Take monthly temperature readings at sentinel outlets (the nearest and furthest from the storage point)
  • Check the hot water cylinder or calorifier is storing water at 60°C or above
  • Descale and clean showerheads and spray taps on the planned schedule to remove scale and biofilm
All checks done
Maintenance

Water Temperature & Flushing Log

A straightforward record of temperature checks and flushing that keeps your water system safe from Legionella and proves you stayed on top of it.

10 checksPDF + phoneReviewed for 2026Source: HSE Approved Code of Practice L8 and technical guidance HSG274 Part 2 (control of Legionella in hot and cold water systems)
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What’s on it

10 things to check.

Everything that matters, nothing that does not. Here is the full list, exactly as it appears on the template.

  • 1Run little-used taps, showers and outlets weekly for several minutes to stop water sitting and stagnating
  • 2Check hot water reaches 50°C or above at the tap within one minute of running, and record the reading
  • 3Check cold water stays below 20°C at the tap within two minutes of running, and record the reading
  • 4Take monthly temperature readings at sentinel outlets (the nearest and furthest from the storage point)
  • 5Check the hot water cylinder or calorifier is storing water at 60°C or above
  • 6Descale and clean showerheads and spray taps on the planned schedule to remove scale and biofilm
  • 7Record the date, time, outlet, reading and who carried out each check and flush
  • 8Flag any reading in the 20°C to 45°C danger zone and report it for action
  • 9Log the corrective action taken and re-check once it has been done
  • 10Keep the completed records on file, as guidance expects them retained for at least five years

Good to know

HSE guidance HSG274 expects hot water to reach 50°C or above at the outlet within one minute and cold water to stay below 20°C within two minutes, with monthly checks at sentinel outlets and weekly flushing of little-used outlets, because Legionella multiplies in the 20°C to 45°C range; records should be kept for at least five years.

Source: HSE Approved Code of Practice L8 and technical guidance HSG274 Part 2 (control of Legionella in hot and cold water systems)

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Water Temperature & Flushing Log

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