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A. GENERAL INFORMATION - HOW YOUR FILTER WORKS.
1.
Your high rate sand filter is designed to produce clear, sparkling water and operate for years with a minimum of maintenance
when installed, operated and maintained in accordance with these instructions:
Your filter uses special filter sand to remove dirt particles from the water. Dirt is collected in the filter by the sand bed as
water flows through the filter. Water enters the filter through the valve on top of the filter (or the top bulkhead fitting in the
case of side mounted control valves). It is then distributed evenly downward, across and through the sand bed. The dirt is
removed by the sand and the clean water flows through the piping (laterals) at the bottom of the filter up through the center
pipe back to the valve on top of the filter (or out of the lower bulkhead on side mounted filters), where the clean water is
returned to the pool through the piping.
After a period of time, dirt will accumulate in the filter causing a resistance to the flow of water through the filter. This
resistance results in a diminished flow rate and a rise in the pressure of the filter. Eventually the filter sand will have removed
so much dirt and the filter pressure risen to such a point that it will be necessary to clean (backwash) your filter.
By setting the control valve on the top or side of the filter to the backwash position, the flow direction of water is reversed
through the filter so that the water is directed to the bottom of the filter and up through the sand bed flushing the dirt and
debris out through the waste line. Once the backwash procedure is complete, the valve must be returned to its filter position to
resume normal filtration.
The filter's function is to remove suspended matter from the water and does not sanitize the water. For sparkling clear water
the water must be sanitized as well as chemically balanced. Pool chemistry is a specialized area and you should consult your
local pool service specialist for specific details. In general, proper pool sanitation requires a free chlorine level of 1 to 2 PPM
and a pH range of 7.2 to 7.6.
Failure to operate your filter system or inadequate filtration can cause poor water clarity obstructing visibility in your pool. POOR WATER
CLARITY MAY OBSCURE OBJECTS IN THE WATER WHICH MAY EXPOSE SWIMMERS OR DIVERS TO THE RISK OF SEVERE INJURY OR
DEATH. NEVER SWIM IN A POOL WITH POOR WATER CLARITY.
2.
This filter operates under pressure. When clamped properly and operated without air in the water system, this filter will
operate in a safe manner.
3. The pressure gauge is the primary indicator of how the filter is operating. Maintain your pressure gauge in good working order.
The following information should be read carefully since it outlines the proper manner of care and operation for your filter system. As a
result of following these instructions and taking the necessary preventative care, you can expect maximum efficiency and life from your
filtration system.
B. FILTER MEDIA.
1.
Media - Your sand filter uses a #20 grade silica filter sand for its media (.45 - .55 mm). It should be free of all limestone or clay.
Most pool supply and building material stores carry silica sand. See Table 2 for the appropriate amounts of silica sand.
Product #
58920100
58920200
58920300
2.
Remove the lid from your filter and install the sand funnel on the top of the filter tank. It is important to swing the diffuser
basket(s) to a horizontal position before installing the funnel. Fill the tank about half full of water. Pour the silica sand into the
top of the filter tank slowly, so that the weight does not damage the lateral assembly in the bottom of the tank or the overdrain
plumbing near the top of the tank.
3.
After filling the filter tank with the appropriate amount of silica sand, remove the sand funnel and wash away any loose sand
from the opening of the filter tank. Straighten the diffuser basket(s) up into the vertical operating position if you previously
moved them down.
4. To install lid, follow procedures in Section C, Lid and Valve Installation Instructions.
Rev. H • Rev. H • Rév. H
Filter Diameter
26 in.
30 in.
36 in.
5-15-01
WARNING
CAUTION
Table 2.
Filter Area
Sand Qty.
3.5 sq. ft.
225 lbs.
4.6 sq. ft.
350 lbs.
6.5 sq. ft.
575 lbs.
3
Maximum
Working PSI
50 psi
50 psi
50 psi
P/N • Núm/Pte. • Réf. P/N 99226000
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