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The pressure gauge
is the primary
indicator of filter performance. Maintain
the pressure gauge in good working
order. If the gauge is damaged, replace
it immediately.
Cartridge Cleaning
When to clean the filter:
The filter
cartridge should normally be removed
and cleaned when the pressure gauge
reads 8 psi to 10 psi (55 kPa - 69 kPa)
above the start-up pressure noted
below:
Installation date: __________________
Start-up pressure: __________________
Cleaning pressure: __________________
In some pools and spas, accessories
such as fountains, waterfalls, and pool
cleaners may be noticeably affected by
the normal decrease in flow as the filter
becomes dirty. If so, these systems may
require more frequent cleaning (that is,
at a pressure increase of less than 10 psi)
to operate properly.
Failure to remove
all oils and cleaning
solution before soaking cartridge in
acid will permanently damage the filter
cartridge.
If the filter has a coating of algae,
calcium carbonate (residue from
calcium
hypochlorite), iron or other
minerals,
soak the cartridge in a
solution of one
part muriatic acid
to twenty parts water
(6 fl oz per
gallon of water) until all
bubbling
stops.
Wear
rubber
gloves, protective clothing
and safety goggles when
using acid. Do not add water
to acid, as splashing of full
strength acid could result.
Thoroughly rinse the cartridge to
remove all acid solution.
When this
procedure no longer
adequately cleans the cartridge, discard
the cartridge and replace it with a new
one.
Carefully follow the steps in the
“Filter Assembly” section of this
manual.
When using PHMB
(polyhexamethylene
biguanide) based sanitizers, such as
Baquacil
®
, special care must be taken
when cleaning the cartridge. Cartridges
in systems using these sanitizers
must be cleaned more frequently and
thoroughly than chlorine systems.
PHMB based sanitizers also require the
use of special PHMB cleaners. Carefully
follow the PHMB sanitizer/cleaner
manufacturer's instructions when
cleaning the filter. Use of any other
type of cleansers with PHMB sanitizers
will permanently clog the filter and will
void the filter warranty
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