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Every precaution should be taken to preserve the clean condition of the hose during the
watering operation.
Those components taken to the watering point and not required should be left in the truck.
Watering Points
These should be clearly identified by a number at the site and the hydrant-pit cover given a
durable and conspicuous coat of paint.
The permanent hydrant-pit covers should be watertight and, when the hydrant is being used,
a closely fitted temporary cover should be available to allow for a standpipe and to shelter the
hydrant-pit.
All hydrant-pits should be effectively drained, rendered with a smooth and light-coloured
surface, and always kept in a clean condition.
The hydrant discharge should always be effectively capped when not in use.
Operation
Connections at the hydrant and on the ship should be supervised by an authorised officer of
the Port of London Authority.
Standpipes should be used at the hydrant and hoses kept clear of quay and dock water.
All connections at the ship must be made in order to avoid any possibility of backsyphonage
from the ship installation to the shore mains supply.
In any circumstances where closed-connection must be made on the ship, an effective nonreturn
device should be incorporated in the supply equipment to safeguard against back-syphonage.
The water supply equipment should always be adequately flushed through before allowing the
supply to enter the ship's filling lines.
As far as practicable, the supply of fresh water should be supervised by an authorised person.
4. Number and sanitary conditions of water boats and powers of control by the Authority.
Only one sample from a waterboat tank was reported as "unfit" during the year. The water boat
was immediately withdrawn from service for cleaning, cement washing, chlorination and re-samping
before being permitted to supply water to shipping. Three "unfit" and one "suspicious"
sample from the ends of delivery hoses were reported by the laboratories. The affected hoses
and connections were properly sterilised before any further service.
Water boats are registered annually by the Port of London Authority and such registration
is made conditional upon the report of the Medical Officer of Health of the Port as to the fitness
of the craft for the carriage of drinking water as also upon the purity of the water thus carried. To
this end sampling is carried out from time to time.