SF MEDIA FILTER INSTALLATION AND OPERATION MANUAL
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10
MULTIPORT CONTROL VALVE
FUNCTIONS
The Multiport Control Valve controls the direction of water flow throughout your filter allowing
you to easily filter your swimming pool water and then clean your filter tank. Correct operation
of the Multiport Control Valve will give you healthy, clean water for many years. It is important
to understand the functions of each setting which is explained below.
Please take a moment to read and understand.
1) FILTER
This is the standard position when your filtration system is in normal operation. The water
flows in from your pool and is distributed across the top of the sand bed in the filter. Through
pressure this water is pushed down through the Sand allowing debris to be removed from the
water and collected in the sand bed. Water is then taken up through the laterals and the centre
stem pipe and returned to the pool, usually via some form of sanitation and/or heating. The
filter position can also be used for manual vacuuming and cleaning.
2) BACKWASH
This position is used when the sand bed requires cleaning. Use the Pressure Gauge to indicate
when this is required, usually 5 PSI or 35 kPa above operation of a clean filter. When backwash
is selected the water flow is reversed and goes down the stem pipe and out through the
laterals. This lifts the sand bed and allows debris to be taken up the filter and out through the
waste pipe. The sight glass will show the quality of the water and you need to backwash until
this water is clear.
3) WASTE
The waste position allows you to pump excess water from the pool directly down the waste
pipe. This position is useful after heavy rains where the water level is too high. Water is
directed straight through the Multiport Control Valve and bypasses the filter, going directly to
waste. You can also use this position to vacuum heavy concentration of debris from the pool.
4) RECIRCULATE
Similar to the Waste setting, Recirculate allows the water to bypass the filter but goes straight
back to the pool. This is a useful setting if you have applied some chemicals that need to be
circulated, but not removed by the filter. In addition, if a leak develops in the filter use
recirculate to continue circulating water until it is fixed.
5) RINSE
Rinse is a very important setting to use after you have completed the Backwash cycle. In the
Rinse setting, water is taken from the pool and distributed on the sand bed. This downward
flow settles the sand bed after backwashing and carries any remaining loose dirt through to the
waste line. By using Rinse after Backwashing you will eliminate any debris returning to the pool
water. Rinse until you see clear water in the Sightglass and should take half the time of a
Backwash cycle.
