Class 1: Temperature Monitoring

by Water Hygiene Centre, on 31-08-2023
Find me on:

Temperature control is widely recognised as the traditional means to reduce Legionella risk within domestic hot and cold water systems. The correct method for taking a temperature from an outlet is important to demonstrate that a temperature control strategy is compliant.  

This Water Hygiene Centre Academy Video Covers;

  • What you need for correctly taking temperatures

  • How to accurately take temperature readings and record them


In order to understand what temperature monitoring entails and how such planned preventative maintenance should be completed in accordance with guidance notes (HSG274 Part 2 (table 2.1), it would, first of all, be prudent to differentiate between the requirements of managing hot and cold water distribution systems.

New call-to-action


Cold Water Systems

Monitoring cold water systems requires the adequate identification of ‘sentinel points’ – defined as the ‘nearest’ and ‘farthest’ monitoring points; to/from cold water storage cisterns and on long pipework branches to provide assurances that cold water is <20°C and that this can be achieved within x2 minutes of opening an outlet.


Hot Water Systems

Monitoring hot water systems ‘initially’ requires differentiating between non-circulating and circulating water systems. Non-circulating systems require the identification of sentinel points (as per the rationale for cold water systems) to provide ‘monthly’ assurances that hot water (>50°C within non-health estates and >55°C within health estates) is achieved within x1 minute of opening a given outlet.


Temperature parameters will be determined by the occupant susceptibility within the building, these parameters are detailed in: HTM 04-01: Safe Water in healthcare premises. Part B: Operational management 


For more advice on temperature monitoring of loops and sentinel points - click here to read our blog

Editors Note: The information provided in this blog is correct at date of original publication - August 2023. 

© Water Hygiene Centre 2023

New call-to-action

About the author

Water Hygiene Centre

The Water Hygiene Centre was established in 2009 to address the lack of independent water hygiene consultancy within the industry. From our humble beginnings, we have established ourselves as a market leader, helping clients identify and minimise the risk of waterborne contamination and disease, whilst improving compliance performance.

Share your thoughts

    Subscribe to our weekly email updates

    New call-to-action