Page 256 - The City and Guilds Textbook: Plumbing Book 1 for the Level 3 Apprenticeship (9189), Level 2 Technical Certificate (8202) and Level 2 Diploma (6035)

The City & Guilds Textbook: Plumbing Book 1

Fluid category 5
Fluid category 5 represents a serious health risk because of the concentration
of pathogenic organisms, radioactive material or very toxic substances. These
include water that contains:
● faecal material or any other human waste
● butchery or any other animal waste
● pathogens from any source.
Typical fluid category 5 situations are as follows.

● General:
● industrial cisterns and tanks
● hose union bib taps in a non-domestic installation
● sinks, WC pans, urinals and bidets
● permeable pipes in any non-domestic garden, whether laid at or below
ground level
● grey-water recycling systems.
● Medical:
● laboratories
● any medical or dental equipment with submerged inlets
● bedpan washers and slop hoppers
● mortuary and embalming equipment
● hospital dialysis machines
● commercial clothes-washing equipment in care homes and similar premises
● baths, washbasins, kitchen sinks and other appliances that are in
non-domestic installations.
● Food processing:
● butchery and meat trade establishments
● slaughterhouse equipment
● vegetable washing.
● Catering:
● dishwashing machines in healthcare premises and similar establishments
● vegetable washing.
● Industrial/commercial:
● industrial and chemical plants
● laboratories
● any mobile tanker- or gulley-cleaning vehicles.
● Sewage treatment works and sewer cleaning:
● drain-cleaning plant
● water storage for agricultural applications
● water storage for fire-fighting systems.
● Commercial agricultural:
● commercial irrigation outlets below or at ground level, and/or permeable
pipes, with or without chemical additives
● insecticide or fertiliser applications
● commercial hydroponic systems.
The list of examples of applications outlined above for each fluid category is not
exhaustive.

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