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SAND DOLLAR
®
and CRISTAL-FLO™ II
Top Mount Sand Filter Installation and User’s Guide
ENGLISH
FILTER OVERVIEW
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 and is distributed evenly
downward across 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 stand pipe, back to the valve on top of the filter, where the
clean water is returned to the pool through the piping or hoses.
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 of water 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.
This filter operates under high pressure. When any part of the
circulating system (e.g., clamp, pump, filter, valves, etc.) is serviced,
air can enter the system and become pressurized. Pressurized air can cause the lid or
control valve to separate which may result in serious injury, death, or property damage. To
avoid this potential hazard, follow these instructions.
1. Before repositioning valves and before beginning the assembly, disassembly, or
adjustment of the clamp or any other service of the circulating system:
(a) Turn the pump off and shut off any automatic controls to ensure the
system is not inadvertently started during the servicing;
(b) Open manual air relief valve;
(c) Wait until all pressure is relieved, pressure gauge must read zero (0).
2. Whenever installing the filter clamp, follow the filter valve and clamp installation
instructions exactly.
3. Once service on the circulating system is complete, follow system restart
instructions exactly.
4. Maintain circulation system properly. Replace worn or damaged parts immediately
(e.g., clamp, pressure gauge, relief valve, o-rings, etc.).
5. Be sure that the filter is properly mounted and positioned according to instructions
provided.
Tank
Diameter
Filter Area
Sq. Ft.
Lbs. of Sand
Required
Max Working
Pressure (PSI)
Vrtl. Clearance
Required
Design Flow
Rate GPM
Max Water
Temp
16” 1.40 100 30 45” 35 95°F
19” 1.92 150 35 49” 40 95°F
22” 2.64 250 40 55” 60 95°F
24” 3.15 300 50 58” 70 95°F
26” 3.69 350 50 60” 75 95°F
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