Water supply and transfer chain
Even if the water at the airport is safe, that does not ensure that it will remain safe during the
transfer to the aircraft and storage activities that follow. An understanding of the aircraft
drinking-water supply and transfer chain will help to illustrate the points at which the water
can become contaminated en route to the tap on board the aircraft.
Generally, the aircraft drinking-water supply and transfer chain consists of four major
components:
1. the source of water coming into the airport;
2. the airport water system, which includes the on-site distribution system. It may also
include treatment facilities if the airport produces its own potable water;
3. the transfer point (sometimes referred to as the watering point), including the water
transfer and delivery system. It is typically a temporary interconnection between the hardplumbed
distribution system of the airport (e.g. at a hydrant) and the aircraft water
system, by means of potable water vehicles and carts, refillable containers or hoses. This
water transfer process provides multiple opportunities for the introduction of
contaminants into the drinking-water;
4. the aircraft water system, which includes the water service panel, the filler neck of the
aircraft finished water storage tank and all finished water storage tanks, including
refillable containers/urns, piping, treatment equipment and plumbing fixtures within the
aircraft that supply water to passengers or crew.
Water supply and transfer chainEven if the water at the airport is safe, that does not ensure that it will remain safe during thetransfer to the aircraft and storage activities that follow. An understanding of the aircraftdrinking-water supply and transfer chain will help to illustrate the points at which the watercan become contaminated en route to the tap on board the aircraft.Generally, the aircraft drinking-water supply and transfer chain consists of four majorcomponents:1. the source of water coming into the airport;2. the airport water system, which includes the on-site distribution system. It may alsoinclude treatment facilities if the airport produces its own potable water;3. the transfer point (sometimes referred to as the watering point), including the watertransfer and delivery system. It is typically a temporary interconnection between the hardplumbeddistribution system of the airport (e.g. at a hydrant) and the aircraft watersystem, by means of potable water vehicles and carts, refillable containers or hoses. Thiswater transfer process provides multiple opportunities for the introduction ofcontaminants into the drinking-water;4. the aircraft water system, which includes the water service panel, the filler neck of theaircraft finished water storage tank and all finished water storage tanks, includingrefillable containers/urns, piping, treatment equipment and plumbing fixtures within theaircraft that supply water to passengers or crew.
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