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Big Mouth® Flow-Through
Big-Mouth® plugs serve multiple applications. Great for gravity bypassing or bypass pumping.

The Original Big-Mouth® Plug:

• Large male NPT threaded bypass
• Equipped with removable 3/8" eye bolt for lifting
and lowering with a poly-lift line
• Removable tire valve allows for easy replacement
• Lightweight aluminum bypass

Multi-Size Big-Mouth® Plug with Interchangeable Flanges:
• Multi-size offers great expansion range
• Lightweight aluminum bypass
• Feature interchangeable bypass flange, allowing the same plug to be used for different applications
• Removable tire valve allows for easy replacement

Cherne Big Mouth® Flow-Through

Cherne Multi-Size Big-Mouth® Plug with Interchangeable Flanges:

 

 

 

 

 

Multi-Size Big-Mouth® Plug with Interchangeable Flanges:
• Multi-size offers great expansion range
• Lightweight aluminum bypass
• Feature interchangeable bypass flange, allowing the same plug to be used for different applications
• Removable tire valve allows for easy replacement

Part
Number

Nominal
Size

Bypass
Diameter

   Big Mouth Flange Kit

049068

14" - 21"

6" MNP

049088

14" - 21"

8" MNP

049188

18" - 24"

8" MNP

049208

18" - 24"

10" MNP

049328

24" - 36"

12" MNP

 

Big Mouth® Flow-Through

Part
Number

Nominal
Size

Bypass
Diameter

Range
of Use

Maximum
Back Pressure

Inflation Pressure

Product
Weight

Deflated
Length

Deflated
Diameter

Inflation
Thread

Chain /
Eye bolts

Original Big Mouth Plugs

369068

6"
(150 mm)

4" MNP

5.69"-6.34"
(145 -161 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

7 lbs
(3.2 kg)

13.25"
(337 mm)

5.38"
(137 mm)

1/8" (1)

3/8" (1)

374068

6" - 10"
(150-250 mm)

4" MNP

5.75"-10.25"
(146-260 mm)

10 psi
(0,69 bar)

23 ft
(10 M)

40 psi
(2,8 bar)

15 lbs
(6.8 kg)

24.5"
(622 mm)

5.65"
(146 mm)

1/4" (1)

3/8" (1)

369088

8"
(200 mm)

6" MNP

7.75"-8.45"
(195-215 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

10 lbs
(4.5 kg)

16"
(406 mm)

7.5"
(191 mm)

1/4" (1)

3/8" (1)

374088

8" - 12"
(200-300 mm)

4" MNP

7"-12.25"
(178-311 mm)

15 psi
(1 bar)

34 ft.
(10.5 M)

35 psi
(2,4 bar)

22 lbs
(10 kg)

26"
(660 mm)

6.75"
(165 mm)

1/4" (1)

3/8" (1)

269008

8" - 10"
(200-250 mm)

4" MNP

7.25"-10.25"
(185-250 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

35 psi
(2,4 bar)

8.8 lbs
(4 kg)

14.88"
(378 mm)

6.94"
(176 mm)

1/4" (1)

3/8" (1)

369108

10"
(250 mm)

8" OD

9.75"-10.46"
(250-266 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

17 lbs
(7.7 kg)

20"
(508 mm)

9.13"
(232 mm)

1/4" (1)

3/8" (1)

376088

8" - 12"
(200-300 mm)

6" MNP

7"-12.25"
(178-311 mm)

15 psi
(1 bar)

34 ft.
(10.5 M)

35 psi
(2,4 bar)

22 lbs
(10 kg)

26"
(660 mm)

6.76"
(165 mm)

1/4" (1)

3/8" (1)

269018

10" - 12"
(250-300 mm)

6" MNP

9.25"-12.25"
(235-311 mm)

11 psi
(0,76 bar)

25 ft
(7.6 M)

30 psi
(2,1 bar)

15.7 lbs
(7.12 kg)

17.25"
(438 mm)

8.81"
(224 mm)

1/4" (1)

3/8" (1)

369128

12"
(300 mm)

10" OD

11.75"-12.52"
(300-318 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

21 lbs
(9.5 kg)

20"
(508 mm)

11.13"
(283 mm)

1/4" (1)

3/8" (1)

269028

12" - 15"
(300-380 mm)

6" MNP

10.62"-15.25"
(300-380 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

20 lbs
(9 kg)

17.88"
(454 mm)

10.25"
(260 mm)

1/4" (1)

3/8" (1)

376128

12" - 18"
(300-450 mm)

6" MNP

11.25"-18.25"
(286-464 mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

25 psi
(1,7 bar)

45 lbs
(21 kg)

28"
(711 mm)

11"
(279 mm)

1/4" (1)

3/8" (1)

369158

15"
(380 mm)

12" OD

13.9"-15.56"
(353-395 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

26 lbs
(11.8 kg)

20"
(508 mm)

13.13"
(333 mm)

1/4" (1)

3/8" (1)

378128

12" - 18"
(300-450 mm)

8" MNP

11.25"-18.25"
(286-464 mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

25 psi
(1,7 bar)

45 lbs
(21 kg)

28"
(711 mm)

11"
(279 mm)

1/4" (1)

3/8" (1)

369188

18"
(450 mm)

15" OD

16.88"-18.74"
(429-476 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

31 lbs
(14 kg)

20"
(508 mm)

16.13"
(410 mm)

1/4" (1)

3/8" (1)

369218

21"
(525 mm)

18" OD

20.01"-21.81"
(508-554 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

37 lbs
(16.8 kg)

20"
(508 mm)

19.13"
(486 mm)

1/4" (1)

3/8" (1)

369248

24"
(600 mm)

20" OD

22.63"-24.98"
(575-634 mm)

11 psi
(0,76 bar)

25 ft.
(7.6 M)

30 psi
(2,1 bar)

42 lbs
(19 kg)

20"
(508 mm)

21.13"
(537 mm)

1/4" (1)

3/8" (1)

Multi-Size Big Mouth Plugs

376148

14" - 21"
(375-525 mm)

6" MNP

13.6"-21.25"
(375-525 mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

25 psi
(1,7 bar)

60 lbs
(27 kg)

30"
(762 mm)

13.25"
(337 mm)

1/8" (1)

3/8" (2)

378148

14" - 21"
(375-525 mm)

8" MNP

13.6"-21.26"
(375-525 mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

25 psi
(1,7 bar)

60 lbs
(27 kg)

30"
(762 mm)

13.25"
(337 mm)

1/8" (1)

3/8" (2)

380148

14" - 21"
(375-525 mm)

10" MNP

13.6"-21.27"
(375-525 mm)

10 psi
(0,69 bar)

23 ft
(10 M)

25 psi
(1,7 bar)

60 lbs
(27 kg)

30"
(762 mm)

13.25"
(337 mm)

1/8" (1)

3/8" (2)

376188

18" - 24"
(450-600 mm)

6" MNP 

16.5"-24.25"
(419-616 mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

22 psi
(1,5 bar)

90 lbs
(41 kg)

34"
(864 mm)

6"
(406 mm)

1/8" (1)

1/2" (2)

378188

18" - 24"
(450-600 mm)

8" MNP

16.5"-24.26"
(419-616 mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

22 psi
(1,5 bar)

90 lbs
(41 kg)

34"
(864 mm)

6"
(406 mm)

1/8" (1)

1/2" (2)

380188

18" - 24"
(450-600 mm)

10" MNP

16.5"-24.27"
(419-616 mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

22 psi
(1,5 bar)

90 lbs
(41 kg)

34"
(864 mm)

6"
(406 mm)

1/8" (1)

1/2" (2)

376248

6" MNP

21.75"-36.25"
(525-921mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

20 psi
(1,4 bar)

146 lbs
(67 kg)

41.5"
(1054 mm)

21.5"
(546 mm)

1/4" (1)

1/2" (2)

378248

8" MNP

21.75"-36.26"
(525-921mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

20 psi
(1,4 bar)

146 lbs
(67 kg)

41.5"
(1054 mm)

21.5"
(546 mm)

1/4" (1)

1/2" (2)

380248

10" MNP

21.75"-36.27"
(525-921mm)

10 psi
(0,69 bar)

23 ft.
(10 M)

20 psi
(1,4 bar)

146 lbs
(67 kg)

41.5"
(1054 mm)

21.5"
(546 mm)

1/4" (1)

1/2" (2)