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Underground Grease Traps Sizing Chart
Nominal Operating Capacity
Grease
Volume
Nominal Inside Dimensions
Inlet /
Outlet**
(gal)
(gal / lbs)
Diameter
Length
Diameter
* 240
63.4 / 483
3’ 2”
4’ 0”
4”
* 300
76.4 / 581
3’ 2”
5’ 0”
4”
550
137 / 1,041
3’ 6”
7’ 9”
4”
750
190 / 1,444
3’ 6”
10’ 9”
4”
1,000
246 / 1,875
4’ 0”
10’ 9”
6”
1,500
403 / 3,065
5’ 4”
9’ 0”
6”
2,000
514 / 3,906
5’ 4”
12’ 0”
8”
2,500
643 / 4,886
5’ 4”
15’ 0”
8”
3,000
771 / 5,861
5’ 4”
18’-0”
8”
4,000
1,028 / 7,817
5’ 4”
24’ 0”
8”
5,000
1,245 / 9,464
6’ 0”
23’ 10”
10”
6,000
1,497 / 11,383
6’ 0”
28’ 8”
10”
7,000
1.847 / 14,040
7’ 0”
24’ 4”
10”
8,000
2.666 / 20,264
7’ 0”
28’ 0”
10”
9,000
2,349 / 17,858
8’ 0”
24’ 0”
12”
10,000
2,611 / 19,842
8’ 0”
26’ 8”
12”
12,000
3,133 / 23,811
8’ 0”
32’ 0”
12”
15,000
5,000 / 37,996
10’ 0”
25’ 6”
14”
20,000
5,413 / 41,140
10’ 6”
31’ 0”
16”
25,000
6,544 / 49,738
10’ 6”
38’ 9”
18”
30,000
7,580 / 57,606
10’ 6”
46’ 6”
20”
40,000
10,035 / 76,369
12’ 0”
47’ 6”
24”
50,000
12,570 / 95,538
12’ 0”
59’ 6"
24”

* - One Manway, Single-Basin & Double-Basin ONLY. ** NPT for 4-6" Inlet and Outlet, 8" and larger will be Flanged Connections. Gravity Grease Interceptor (GGI) sizing and construction is consistent with industry protocol for complying with the sewer pre-treatment regulations. GGI sizing is based on 30-minute retention time. Drain-Net for alternate sizing methods.
 
Grease Traps