Swift Tourer Owner's Handbook Manual page 188

C HAS S I S
again to the centre hot and cold position
and leave them open whilst the caravan is
out of use.
• Also remove the shower head, and leave
the head in an upright position.
• If present connect the external shower
handset and fully open to drain,
disconnect and store.
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 dis-assemble and clean (if necessary) the
filter fitted on the input side of the pump.
The easiest method of disconnecting
the pump will vary depending on which
manufacturers pump is fitted. The options are
to unscrew the 'Beige' screw-fit adaptors from
the pump inlet and outlet, remove the quick-
release tabs from the Posi-flo type pump, or
remove the 'Blue' pipe work from the push
fit plumbing connections. (Details of releasing
push fit plumbing connections can be found
later in this document).
Water filter
186
Screw fit adaptor
Quick release tabs
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When the steel is withdrawn from the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).
In order to prevent the occurrence of wet
storage stain in the first instance, and to allow
the final protective layer to form correctly it is
important to ensure that all galvanised parts
are stored in good conditions, with sufficient
ventilation to allow good air circulation.
In the case of caravans, 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.