> For the complete documentation index, see [llms.txt](https://support.meetuma.ai/uma-knowledgebase/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://support.meetuma.ai/uma-knowledgebase/data-and-reporting/insights/water-legionella-detection-guide.md). # Water - Legionella Detection Guide **Hot Water Temperature Compliance (HTM 04-01)**\ HTM 04-01 COMPLIANCE | USER GUIDE ## How to check hot water outlet temperatures using the Water Temp dashboard This guide explains how to use the Water Temp dashboard to check that hot water outlets reach 55°C within one minute, in line with HTM 04-01. The dashboard updates automatically throughout the day, so there is no need to select a date. Open it and check the live trend for today. ### What you are looking at The dashboard shows water temperature over time, recorded by a Quandify CubicMeter sensor fitted to the outlet tail pipe. It is labelled HTM 04-01 Compliance and shows whether hot water at each outlet is reaching the required temperature. ### Checking an outlet #### Step 1 - Select the outlet you want to check Use the Filter by resource dropdown at the top right of the dashboard. Choose the outlet or location you want to review, for example Kitchen or a specific ward outlet. The dashboard will immediately show today's live temperature trend for that outlet. #### Step 2 - Run the hot tap for 1–2 minutes then turn it off At the outlet, turn the hot tap on fully. Run it for exactly 60 seconds, timed, then turn it off. Once the flow stops, no fresh hot water reaches the sensor. This means the highest temperature recorded is the temperature the water reached within the first minute. Nobody else should use this outlet from the start of the draw-off until the reading appears on the chart (Step 3). Any other use in that time would affect the result. #### Step 3 - Wait for the next reading and check the chart The sensor reports the maximum temperature recorded in each 10-minute window. After the draw-off, wait for the next data point to appear on the chart. Each point on the cyan line shows the highest temperature captured during that window. If the draw-off ran across two windows, use the higher of the two readings. If the reading reaches or exceeds the pink dashed 55°C line and shows a green dot, the outlet has passed. #### Step 4 - Identify any failures If the reading does not reach the pink dashed line, the outlet has not shown that it reached 55°C within one minute. Note the time and outlet name, and escalate as per your site procedure. If a reading is close to the line, confirm it with a contact probe at the tap. #### Step 5 - Repeat for other outlets Use the Filter by resource dropdown to switch to the next outlet and repeat the check. Work through every outlet in your water safety monitoring schedule.

What counts as a passing reading

Each point on the chart shows the maximum temperature the sensor recorded during that 10-minute window. A green dot means that maximum reached 55°C or above. When the 60-second draw-off procedure has been followed, this counts as a passing reading under HTM 04-01. The dashboard updates live as new readings come in, so you always see the most current data available.

Important — this dashboard is a screening tool

The sensor is fitted at the outlet tail pipe and measures the temperature of the pipe surface. This reads slightly lower than a contact probe in the water, so any error will tend to show a false fail rather than a false pass. When the 60-second draw-off procedure is followed, a pass shows that the outlet reached 55°C within one minute. Borderline results should be confirmed with a contact probe at the tap.

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