MAINTENANCE
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After a short while the majority of water will
have left the plumbing system. At this point
however it is still important to ensure that the
pump itself is 'dry'. During this part of the
winterisation, a suitable absorbent cloth or
container should be used to catch a small
amount of spilled water that will result.
The pump should be disconnected on the
output side of the pump, and run for a short
while to expel any water contained within the
pump body and filter. This is also a good time
to disassemble and clean (if necessary) the
filter fitted on the input side of the pump.
The easiest method of disconnecting the
pump is to remove the quick-release tabs from
the Posi-flo type pump (details of releasing
push fit plumbing connections can be found in
this handbook).
Screw fit adaptor
Quick release tabs
Water filter
Galvanised Parts
Wet storage stain (white rust)
Hot dip galvanising has been used for many
years throughout the automotive industry and
is widely regarded as one of the best forms of
corrosion protection.
When the steel is withdrawn from the
galvanising bath it has a clean, bright surface.
Over a period of time this changes to a dull
grey colour as the surface zinc reacts with
oxygen, water and carbon dioxide in the
atmosphere to form a tough, stable, protective
layer.
During this time, if galvanised items are
stored in damp or wet conditions, where
there is little or no air movement then the zinc
will continue to react with the moisture that
is present. In so doing the zinc will produce
excessive amounts of zinc hydroxide. This is
seen as a bulky white deposit on the surface
of the galvanising and is often referred to as
wet storage stain(white rust).
You can help to prevent wet storage stain
(white rust) occurring. You can do this by
washing the chassis with clean water. You
must then allow an adequate flow of dry air to
ensure that they dry off completely.
The caravan should not be parked on long
grass where the air flow around the chassis
is hindered and the dampness retained. It is
most likely that the chassis will rapidly show
signs of wet storage stain under
these conditions.
It is also very important to do this during the
winter months to ensure all salt deposits from
road spray are completely rinsed off.
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