SAND FILTERS
Models: SF500, SF650, SF700 & SF800
FUNCTION
The filter uses special filter media to remove dirt particles from pool water. The filter
media is loaded into the filter tank and functions as a permanent dirt removing
media. When the multiport valve is in the FILTER position, the pool water which
contains suspended dirt particles, is pumped through your piping system and is
automatically directed by the patented filter multiport valve to the top of the filter
tank. As the pool water is pumped through the filter, dirt particles are trapped by the
media bed, and filtered out. The cleaned pool water is returned from the bottom of
the filter tank, through the multiport valve and back to the pool through the piping
system. This entire sequence is continuous and automatic. It provides for total
recirculation of pool water through your filter and piping system.
After a period of time, the accumulated dirt in the filter causes a resistance to flow,
and the flow diminishes. This means it is time to clean your filter. With the multiport
valve in the BACKWASH position, the water flow is automatically reversed through
the filter so that it is directed to the bottom of the tank, up through the media, flushing
the previously trapped dirt and debris out the waste line. Once the filter is back-
washed of dirt, set the multiport valve to the RINSE position and run pump for about
15 to 30 seconds, and then set the multiport valve in the FILTER position, to resume
normal filtering.
NOTE: Turn pump OFF before changing the multiport valve position.
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