15
17
18
16
SETUP INSTRUCTION (continued)
SETUP INSTRUCTIONS
Sand loading:
IMPORTANT: Use only No. 20 silica sand with particle size range 0.45 to 0.85
mm (0.018 to 0.033 inches) and a Uniformity Coefficient less than 1.75.
NOTE: Before loading the tank with sand, ensure the sand filter grid and
center pipe assembly is securely in place on the tank bottom, and the
center pipe (3) is vertically centered inside the tank.
1. To prevent sand from falling into the center pipe top opening when pouring the
sand, cover the center pipe top opening with a cup or similar object (see
drawing 17).
2. With one person holding the center pipe to keep it centered, pour the sand into
the tank at a slow rate manually to prevent the filter grid assembly from shifting
(see drawing 18).
3. In a clockwise motion screw the center pipe (3) onto the filter grid (5) securely
by hand (see drawing 15).
4. Vertically insert the filter grid and center pipe assembly into the tank. Ensure
filter grid assembly is securely fitted to the bottom of the tank, and the center
pipe is vertically centered inside the tank (see drawing 16).
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