Watts OI-ST SERIES User Manual

OI-ST

Tag:

Oil Interceptor with

Integral Storage Tank

SPECIFICATION: Watts Drainage OI-ST Series recessed or floor mounted epoxy coated steel oil interceptor with integral

storage tank, gasketed epoxy coated steel skid-proof cover secured with hex head center bolt(s), deep seal trap with
cleanout, draw-off connection and dual vent connections, sediment bucket, integral stainless steel flow control plate,
and no hub (standard) connections. **Check local plumbing code for oil storage requirements prior to installation.

Flow Rate (Select One)

Suffix Description

10 GPM

10

15 GPM 15

20 GPM 20
25 GPM25
35 GPM 35
50 GPM50

75 75 GPM

100

100 GPM

125 125 GPM

150 GPM

150

200

200 GPM

250

250 GPM

300

300 GPM

350 350 GPM
400 400 GPM

450

450 GPM
500 GPM

500

Options (Select One or More)

Suffix Description

Extension

-E

-HD Heavy Duty (10,000 lb.)
Traffic Cover

Inlet & Outlet other than

-O
Standard Size

Stainless Steel

-SS
Threaded Connections

-THD

-US Buy American Compliant

LEFT SIDE

2” NH VENT

SEDIMENT BUCKET

3/8

INLET

D

ELEVATION

INTERCEPTOR

A

OUTLET

TOP VIEW

ACCESS COVER

3 3/8

TRAP

OIL STORAGE TANK

DRAW-OFF
CONNECTION

INTERNAL
FLOW CONTROL

INLET

RIGHT SIDE

K

H

E

SIDE VIEW

OUTLET

C

F

B

G

MODEL
NO.

OI-10-ST
OI-15-ST
OI-20-ST
OI-25-ST
OI-35-ST
OI-50-ST
OI-75-ST
OI-100-ST
OI-125-ST
OI-150-ST
OI-200-ST
OI-250-ST
OI-300-ST
OI-350-ST
OI-400-ST
OI-450-ST
OI-500-ST

FLOW
RATE
GPM

10
15
20
25

35
50

75
100
125
150
200

250

300

350

400

450

500

COMBINED
VOLUME
USG

15

22
32
35
65
78
214
303
345
358
453
590

816
1068
1111
1115
1242

A
INLET &
OUTLET

2” (51)
2” (51)
3” (76)
3” (76)
4” (102)
4” (102)
4” (102)
4” (102)
4” (102)
4” (102)

4” (102)

4” (102)
6” (152)

6” (152)
6” (152)
6” (152)
6” (152)
6” (152)

B
BASE TO
CENTER

8.5” (216)

12.5” (318)

14.5” (368)

16.5” (419)

14.5” (368)

18.5” (470)

26.5” (673)

26.5” (673)
28” (711)
30” (762)

30.5” (775)

35.5” (902)

36.5” (927)

43.5” (1105)
43” (1092)
43” (1092)
46” (1168)

C D
TOP TO
CENTER

6” (152)
6” (152)
6” (152)
6” (152)
6” (152)
6” (152)
6” (152)

9.5” (241)
12” (305)
14” (356)

17.5” (444)

15.5” (394)

15.5” (394)

16.5” (419)
17” (432)
17” (432)

20” (508)

LENGTH WIDTH

24” (610)

33.75” (857)

39.75” (1010)

39.75” (1010)

49.75” (1264)

49.75” (1264)

49.75” (1264)
90” (2286)
90” (2286)

76” (1930)
90” (2286)
90” (2286)
86” (2184)
94” (2388)
91” (2311)
83” (2108)
83” (2108)

18” (457)

20.875” (530)

20.875” (530)

20.875” (530)

32.875” (835)

32.875” (835)

40.875” (1038)
58” (1473)

62” (1575)

66” (1676)

73.25” (1860)

73.25” (1860)

94.875” (2410)

100.875” (2563)

107.875” (2740)

118.875” (3020)

118.875” (3020)

E F

HEIGHT

14.5” (368)

18.5” (470)

20.5” (521)

22.5” (572)

20.5” (521)

24.5” (622)

32.5” (826)
36” (914)
40” (1016)
44” (1118)
48” (1219)
51” (1295)
52” (1320)

60” (1524)
60” (1524)
60” (1524)

66” (1676)

G

3” (76)
5” (127)
6” (152)

7” (178)
6” (152)
8” (203)

16” (406)

20.5” (521)
22” (559)
24” (610)

24.5” (622)

29.5” (749)

29.5” (749)

36.5” (927)
36” (914)
36” (914)
39” (990)

H

4.5” (114)

4.5” (114)

4.5” (114)

4.5” (114)
12” (305)
12” (305)
12” (305)
15” (381)
16” (406)
17” (432)
18” (457)
18” (457)

23.5” (597)

24” (610)
26” (660)
30” (762)
30” (762)

K J

5.5” (140)

7.5” (191)

7.5” (191)

7.5” (191)
6” (152)
6” (152)

12” (305)

20.5” (521)

22” (559)
24” (610)

25” (635)
25” (635)
33” (838)
35” (889)
38” (965)
42” (1067)

42” (1067)

6” (152)
9” (229)

10.4” (265)

10.4” (265)
13” (329)
13” (329)
13” (329)

22.5” (572)

22.5” (572)

19” (483)

22.5” (572)

22.5” (572)

21.5” (546)

23.5” (597)

22.75” (578)

20.75” (527)

20.75” (527)

ES-WD-OI-ST USA 1345 OI-ST