The guidance in HSG274 Part 2 includes monthly checks of calorifier flow and return temperatures. Cold-water storage, incoming supplies and representative outlets need their specified checks too. Keep these separate; measuring one outlet does not cover the whole installation.
Use the right measurement point
Use the drawing and actual distribution to identify sentinel locations, including the relevant nearest, furthest and long-branch outlets. Label them consistently. An easily reached tap is not necessarily a representative check point.
A TMV mixes water to limit scalding risk. Its outlet reading does not reveal the hot-water temperature before mixing. Have the method identify the appropriate supply point without removing scald protection.
HSE's hot and cold water guidance describes hot storage at 60°C or more, hot distribution reaching 50°C within one minute, or 55°C in healthcare, and cold water below 20°C where possible. Do not treat these control values as instructions to supply scalding water or change valve settings without assessment.
Make the log useful
Write down the system and outlet reference, date, method, temperature, relevant timing and who checked it. Include the expected result and who to contact if it is outside the requirement.
If one return loop repeatedly reads low, arrange investigation. Recording the same failure again does not explain whether circulation, settings or changes in use have been addressed.
Review after changes and failures
Tell the person managing the programme about new outlets, refurbishment, different hours or low occupancy. Update the checks accordingly and retain evidence of action after failed results and the readings taken afterwards.
Frequently asked questions
Does every tap need a monthly reading?
No. The programme selects sentinel and representative locations and other system checks. Those choices must give useful coverage of your property’s installation.
Can an automated sensor replace all manual work?
Only where the monitoring is properly designed and verified for its purpose. Sensors still need the right locations, and inspection, servicing and action on failures remain necessary.
What if a temperature check cannot be completed?
Explain why it could not be done and arrange follow-up. A locked or inaccessible point must stay outstanding rather than being marked as satisfactory.
Related help
See Water Hygiene and Legionella and TMV Servicing and Testing, or use the Water Hygiene Checklist and Knowledge Centre to understand the wider property requirements.
