King’s College Hospital NHS Foundation Trust

Looking after 1.5 million patients every year, King’s College
Hospital NHS Foundation Trust employs over 13,500 members of
staff across multiple sites.

Serving the inner-city population of Southwark and Lambeth, as
well as millions from tertiary referral centres in southern
England, King’s College Hospital deals with 400 Emergency
Department attendances per day, and has the largest mental
health patient attendance in the UK.

With a mixture of buildings and water systems varying in age
and complexity, the Trust needed a dedicated and reliable team
of on-site technicians that were able to respond to the
day-to-day needs of the hospital, whilst maintaining a
programme of works that covered all aspects of water hygiene.

After completing a Legionella Risk Assessment for the Trust in
2018, Zeta identified areas where compliance could be
improved, and proposed ways in which this could be delivered
successfully. In 2021, King’s College Hospital awarded Zeta
with a 5 year contract to work on all aspects of HTM 04-01
compliance.

• Measuring and monitoring of water temperatures inaccordance
  with HTM 04-01 and HSG274. Includes remote temperature
  monitoring (IoT).
• Installation and removal of point of use filters.
• Quarterly showerhead replacement programme.
• Cold Water Storage Tank (CWST) inspections and drop level
  tests.
• Thermostatic Mixing Valve (TMV) servicing andmaintenance.
• Lab-based Legionella and Pseudomonas sampling, as well as
  in-house Pseudomonas and Legionella testing using the IDEXX
  Pseudalert and Legiolert process.
• Hot water service calorifier inspection/purge.
• Expansion vessel purging/flushing.
• Strainer inspection and cleaning.
• Dosing system installation, monitoring, maintenance, and
  servicing.
• Outlet flushing.
• Periodic review of water risk assessments, schematics, and
  asset labelling.
• Contract meeting reviews.
• Bespoke compliance schemes on ZetaSafe, for the management
  of dental unit water lines (HTM 01-05) and fire
  extinguishers.
• Expert support and problem solving on the commissioning of
  water systems in the new Willowfield building.

Through a process of asset validation and reconciling ZetaSafe
with the Trust’s compliance scheme, Zeta have managed
to significantly improve schedule adherence. In the first full
year of working at King’s College Hospital, Zeta
completed over 122,000 tasks.