4
GENERAL INFORMATION
• Clean a new pool as well as possible before filling pool and operating fil-
ter. Excess dirt and large particles of foreign matter in the system can
cause serious damage to the filter and pump.
Do not operate filter at water temperatures above 120°F (65.5°C).
NEVER operate this filter system at more than 50 pounds per square
inch (50 PSI/345kPa) pressure!
TABLE I - OUTLINE DIMENSIONS IN INCHES (mm)
Sand A B C D E F
Model No. of Clamps
S7S50 28-1/2(724) 42(1067) 7 36(914) 53-1/2(1360) 2” NPT
S8S70 32-1/2(825) 42-1/4(1073) 8 40(1020) 54-1/4(1380) 2” NPT
TABLE ll - FILTER SPECIFICATIONS AND OPERATING INFORMATION
FILTER MODEL: S7S50 S8S70
Filter Area 2.4 Ft.
2
(.223M
2
) 3.4 Ft.
2
(.316M
2
)
Flow Rate Range 33-48 GPM(125-182 L/m) 47-68 GPM(178-257 L/m)
Public Pool Flow Rate 48 GPM(182 L/m) 68 GPM(257 L/m)
Max. Operating Pressure 50 PSI(345 kPa) 50 PSI(345 kPa)
Freeboard (See Fig. 1B)* 11” (28 cm) 11” (28 cm)
Turnover in Hours:
6 Hours 17,200 Gal.(65 102 liters) 24,400 Gal.(92 354 liters)
8 Hours 23,000 Gal.(87 055 liters) 32,600 Gal.(123 391 liters)
10 Hours 28,800 Gal.(109 008 liters) 40,800 Gal.(154 428 liters)
Qty. of Media Required:
Cu. Ft. 2(56 540cm
3
) 3(84 960cm
3
)
Weight (Pounds) 200(90,7 kg) 300(136 kg)
* Freeboard is the open space between the top of the sand bed and the tank backwash outlet.
NOTICE: 1 cubic foot (28 320 cm
3
) of sand weighs approximately 100 lbs. (45,4kg). DO NOT
use a finer grade of sand than recommended.
RECOMMENDED SAND GRADES:
Use only: #20 Silica Sand, Size Range .40-.55mm., Uniformity Coefficient
less than 1.75.
NOTICE: Use of other sands will reduce filter performance, may damage
pump,and will void warranty.
Recommended:
1. Wedron Silica/Best Sand Co., Sand Grade: Wedron .45-.55mm.,
Effective Size .46mm, Uniformity Coefficient 1.22.
2. U.S. Silica - Silurian Filter Sand, Sand Grade.45-.55 mm., Effective Size
.48mm, Uniformity Coefficient 1.18.
Hazardous pressure.
Can cause severe
injury or major
property damage
from tank blow up.
Release all pressure
and read instructions
before working on filter.