Page 255 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

Chapter 5 Cold water systems

● home dialysis machines
● hand-held garden hoses with a flow-controlled spray or shut-off valve
● hand-held fertilisers.
● In premises other than single-occupancy domestic dwellings:
● domestic fittings and appliances such as washbasins, baths or showers
installed in commercial, industrial or other premises may be regarded
as fluid category 3; however, if there is a potential for a higher risk,
such as a hospital, medical centre or other similar establishment, then
a higher fluid category risk should be applied in accordance with the
regulations
● house-garden or commercial irrigation systems without insecticides.

Fluid category 4
Fluid category 4 is water that constitutes a significant health hazard because of
the concentration of toxic substances, which can include:

● chemical, carcinogenic substances or pesticides (including insecticides and
herbicides)
● environmental organisms of potential health significance.

Typical fluid category 4 situations are as follows.
● General:
● primary circuits of heating systems in properties other than a single-
occupancy dwelling
● fire sprinkler systems using anti-freeze chemicals
● house gardens
● mini irrigation systems without fertilisers or insecticides, including pop-up
sprinkler systems and permeable hoses.
● Food processing:
● food preparation
● dairies
● bottle-washing plants.
● Catering:
● commercial dishwashers
● refrigerating equipment.
● Industrial and commercial installations:
● dyeing equipment
● industrial disinfection equipment
● photographic and printing applications
● car-washing and degreasing plant
● brewery and distilling processes
● water treatment plant or softeners that use methods other than salt
● pressurised fire-fighting systems.

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