1-1/2" NPT
Return to Pool
(Union Connection)
1-1/2" NPT
Suction
Connection
1-1/2" NPT
Waste Outlet
(Union Connection)
23
2-13/16
A
B
7
11
3156 0298
Drain
Plug
(To Tank
Flange)
D
2-5/16
9-1/16
11-1/4
Tank
Dia.
C
E
3157 0298
4
TABLE I - OUTLINE DIMENSIONS IN INCHES (mm)
Filter Model
A
B
C
D
E
15”(406mm) Filters
24 (610)
30-7/8 (784)
15-3/4 (400)
21-11/16 (551)
26-1/16 (662)
18”(457mm) Filters
26-9/16 (675)
33-5/16 (846)
17-3/4 (451)
24-1/4 (616)
27-1/16 (692)
20” (508mm) Filters
28-11/16 (729)
34-7/16 (875)
20-3/4 (527)
26-3/8 (670)
28-9/16 (725)
TABLE ll - FILTER SPECIFICATIONS AND OPERATING INFORMATION
FILTER MODEL:
15”
18”
20”
(AT115 Series)
(AT118 Series)
(AT120 Series)
Effective Filter Area
1.26 Ft.
2
(.117M
2
)
1.57 Ft.
2
(.223M
2
)
2.18 Ft.
2
(.203M
2
)
Max. Flow Rate
25.2 GPM(95 L/m)
31.5 GPM(123 L/m)
43.6 GPM(165 L/m)
Max. Operating Pressure
50 PSI(345 kPa)
50 PSI(345 kPa)
50 PSI(345 kPa)
Max. Operating Temperature 95° F(35°C)
95° F(35°C)
95° F(35°C)
Turnover in Hours:
6 Hours
9,070 Gal.(34 330 liters)
11,340 Gal.(42 922 liters)
15,700 Gal.(59 424 liters)
8 Hours
12,100 Gal.(45 799 liters)
15,120 Gal.(57 229 liters)
20,930 Gal.(79 220 liters)
10 Hours
15,120 Gal.(57 229 liters)
18,900 Gal.(71 536 liters)
26,160 Gal.(99 016 liters)
12 Hours
18,144 Gal.(68 675 liters)
22,680 Gal.(85 844 liters)
31,390 Gal.(118 811 liters)
Qty. of Media Required:
Cu. Ft. (cm
3
)
1(28 320cm
3
)
1.5(42 255cm
3
)
2(56 923cm
3
)
Weight in lbs.(kg)
100(45,4 kg)
150(68 kg)
200(90,7 kg)
NOTE: 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.
Figure 1 - Dimensions
