HSE Legionella References

HSE Legionella References | Quotes directly from the Legionella Guidelines

Site Restrictions

 

“It is important that there should be ease of access to all parts of the system, components and associated equipment for management and maintenance purposes, e.g. tank, calorifiers, thermostatic mixing valves (TMVs), blending valves, circulation pumps etc.” – HSG 274 Part 2 p2.34

Legionella Awareness Training

 

“Inadequate management, lack of training and poor communication can be contributory factors in outbreaks of legionnaires’ disease.” – HSG 274 Part 2 p.16

Water Logbook

 

“Records kept for monitoring and inspection, which should be kept for at least five years.” – HSG 274 Part 2 p.25

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Record Keeping

 

“Records kept for monitoring and inspection, which should be kept for at least five years.” – HSG 274 Part 2 p.25

Water Sampling Analysis Recommended

 

“In both hot and cold water systems, samples should be taken: if considered necessary by the risk assessment, from areas where the target control parameters are not met, from areas subject to low usage, stagnation excess storage capacity, dead legs, excessive heat loss, cross flow from water systems or other anomaly” – HSG 274 Part 2 p.2.122

See when to sample from HSG 274 Part 2.

Review

 

See when to review your legionella risk assessment from HSG 274 Part 2

New System Chlorination Required

 

“Where necessary, hot and cold water services should be cleaned, flushed and disinfected in the following situations, as specified in the NS 8558: on completion of a new water installation or refurbishment of a hot and cold water system. On installation of new components, especially those which have been pressured tested”. – HSG 274 Part 2 p.2127. More examples as to when a disinfection is required.

Lead Pipework

 

Galvanised/lead pipe work is recommended to be removed as it may lead to legionella proliferation. “Avoid using materials that harbour bacteria and other microorganisms or provide nutrients for microbial growth”. – HSG 274 Part 2 p.23

De-scale Services

 

“Dismantle, clean and disinfect removable parts, heads, inserts and hoses where fitted”. – HSG 274 Part 2 Table 2.1

Asset Identification Labelling

 

“It is important that there should be ease of access to all parts of the system, components and associated equipment for management and maintenance purposes, e.g. tank, calorifiers, thermostatic mixing valves (TMVs), blending valves, circulation pumps etc.” – HSG 274 Part 2 p2.34

Monthly Temperature Point Labelling

 

“It is important that there should be ease of access to all parts of the system, components and associated equipment for management and maintenance purposes, e.g. tank, calorifiers, thermostatic mixing valves (TMVs), blending valves, circulation pumps etc.” – HSG 274 Part 2 p2.34

Weekly Flushing

 

“Flush the outlets until the temperature at the outlet stabilises and is comparable to supply water and purge to drain”. – HSG 274 Part 2 Table 2.1

TMV Servicing

 

“To maintain protection again scald risk, TMVs require regular routine maintenance carried out by competent persons in accordance with manufacturer’s instructions”. – HSG 274 Part 2 Table 2.1

TMV Replacement

 

“Where a scalding risk is assessed as low (e.g. where health users immerse their whole body), type 2 TMVs that can be overridden by the users are required by building regulations. Where a scalding risk is considered significant (e.g. where users are very young, very elderly, infirm or significantly mentally or physically disabled or those with sensory loss) then type 3 TMVs that are pre-set and fail-safe should be provided (but are required at healthcare premises) and should be checked regularly to ensure they are failsafe if the cold water supply pressure is interrupted”. – HSG 274 Part 2 box 2.3

TMV Pipework Exceeds 2m

 

“Where a single TMV serves multiple tap outlets, the risk can be increased”. – HSG 274 Part 2 p.2.76 This also applied to TMV’s positioning from the outlet.

TMV Install

 

“Where a risk assessment identifies a significant scalding risk is present, e.g. where there are very young, very elderly, infirm or significantly mentally or physically disabled people or those with sensory loss, fitting TMVs at appropriate outlets, such as hand washbasins and sinks is required.” – HSG 274 Part 2 p.2.75

HTM 04-01: Supplement – Performance specification D 08: thermostatic mixing valves (healthcare premises) See HTM 04-41 extract.

Page 6 – “it is recognised that users of domestic hot water for ablutionary purposes in health and social care establishments, particularly vulnerable people (see Note below), can be at risk of injury by scalding”. “’Vulnerable people’ are defined in Health and Safety Executive’s Health Services Information Sheet 6 as:

• children;

• older people;

• people with reduced mental capacity, mobility or temperature sensitivity;

• people who cannot react appropriately, or quickly enough, to prevent injury.”

TMV Removal

 

“Where a risk assessment identifies the risk of scalding is insignificant, TMVs are not required” – HSG 274 Part 2 p.2.75

.

Flexible Hoses

 

You should ensure all flexible hoses comply with the WRAS approval scheme and be tested and comply with BS 6920. “In buildings where there are those with an increased susceptibility to infection or with processes requiring specific water characteristics, materials of an enhanced quality may be required. Healthcare buildings and care homes should specifically take note of alerts and advice from the Department of Health and Health Facilities Scotland. For example, healthcare premises are advised against the use of ethylene propylene diene monomer (EPDM) lined flexible hoses (tails) as these have been shown to be a risk of microbial colonisation. Such flexible connections should therefore only be used in healthcare premises where an installation has to move during operation or is subject to vibration.”

HSE 274 Part 2 p.2.35

“Flexible hoses should be used only for the following applications: to allow for vibration of equipment; to accommodate vertical displacement of high and low baths and sinks; to facilitate essential maintenance and access of bespoke equipment when no alternative is available. Note – Where fitted, flexible hoses should be kept as short as possible and be kink-free as to no affect flow”. – The Health Technical Memorandum 04-01: Safe water in healthcare premises. Part A: Design, installation and commissioning states in p.3.41

Caution Hot Water, Not Drinking Water, Drinking Water Signs

 

“The Regulations require employers to use a safety sign where there is a significant risk to health and safety” – The Health & Safety (Safety Signs and Signals) Regulations 1996 p.4

Caution signs are recommended at any location where there is the potential for scalding hot water. This includes where TMVs are located as they may fail.

Isolation Valves

 

“Isolation valves should be included in all locations to facilitate maintenance and the implementation of control measures” – HSG 274 Part 2 p2.34

Dead Legs/ Ends

 

Cut back redundant pipe work to avoid stagnation.

The Water Regulations Advisory Scheme advises that ‘Minimising this risk can be achieved by completely removing redundant pipe work. Where this is not practicable the pipe should be terminated so that any ‘dead leg’ so created is no longer than twice the diameter of the pipe’. For example:

• 15mm to be no longer than 30mm (just over 1”)

• 22mm to be no longer than 44mm (just under 2”)

• 28mm to be no longer than 56mm (just over 2”)

• Water Regulations

Backflow Protection / Check Valves

 

“Single check valves are commonly used to prevent backflow” – HSG 274 Part 2 p.2.32

Clean and/or Disinfection

 

“The cold water storage tank should be cleaned, disinfect and any faults rectified”. – HSG 274 Part 2 p.2.57

CWST Refurbishment Required

 

Remove tank(s) where possible due to insufficient turnover and convert to mains water supply or remove existing tank(s) and replace with a new tank (with correct fittings)

Secure Base

 

The tank is sitting on an un-secure base which should be suitable for the tank to rest on.

More Coming Soon

 

More HSE Guidelines References coming soon. In the mean time all of these references and many more are also included within our legionella risk assessments for your ease.

Download the HSE Legionella Guidelines here for FREE

 

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Extremely happy with our legionella risk assessment carried out by uRisk, easy to understand and great customer service. Thanks again
Nickayla Robertson
Nickayla Robertson
21:22 15 Jan 19
Brilliant service! Thanks a lot for the hard graft
Leon Macauley
Leon Macauley
21:12 15 Jan 19
Brilliant Service, efficient, professional, punctual and friendly.
Alex Windsor
Alex Windsor
18:21 15 Jan 19
uRisk have been helping us with our Legionella Control for a number of years now. We've recently had a CQC audit and they were very impressed with our legionella compliance! Thank you for all your help.
Mike Port
Mike Port
20:41 07 Aug 18
Fantastic training courses and we've found the legionella risk assessment very easy to read and far more detailed than any we have previously had. 5 star service!
Gemma Pond
Gemma Pond
20:37 07 Aug 18
Incredibly detailed and professional team. Have been beyond helpful with with our CQC legionella compliance for our Safety. They’ve found solutions to fit around how we work and our budgets. We are always advised with reference to HSE which has been brilliant.
Amy Thorne
Amy Thorne
20:29 07 Aug 18
We're a small GP practice and started using uRisk for legionella risk assessments. We opted to use their remedial and monitoring services and they've been absolutely great. We cannot recommend them enough! Thank you so much!
Amanda Pates
Amanda Pates
18:30 07 Aug 18