COB Industries, Inc

Multi-Size Inflatable Pipe Plugs / Flow Stoppers

COB Industries now offers MultiSize Inflatable pipe plugs / Stoppers in a larger range of sizes with the NEW MLS (Stoppers) and FXBP (Bypass Plug) models. Multisize inflatable pipe plugs and Flexible bypass pipe plugs offer versatility, flexibility and durability with reinforced ozone protected natural rubber construction*. These plugs are extremely popular in all types of construction, water and sewer, and pipeline maintenance applications.

COB MLS and FXBP Plugs are made in the USA and usually in stock up to 60”, with larger sizes usually available within a week or two. *Also available in Nitrile and Neoprene for specialty applications.

COB Advantages

• Used as a block plug, a water/air test plug, or leak locating back plug
• Can be floated down pipe and stopped at desired location to prevent going down a manhole for installation or removal.
• Grows shorter as it inflates to put less stress on plug.

Multi Sized Inflatable Pipe Plugs / Stoppers
Part #	Range Inches	Min Inches	Max Inches	Infl Pressure PSI	Back Pressure PSI	Length Inches	Weight (Lbs)	Bypass inches
MLS 1.5/2.8 (35/70)	1.4 – 2.8	1.3	2.8	45	34	8.3	1	N/A
MLS 02/04 (50/100)	2 – 4	1.8	4	45	34	7.9	1.1	N/A
MLS 03/06 (70/150)	3 – 6	2.6	6	45	34	14.6	1.4	N/A
MLS 04/08 (100/200)	4 – 8	3.5	8	45	19	21.65	5	N/A
MLS 06/12 (150/300)	6 – 12	5.5	12	45	19	21.65	8	N/A
MLS 08/16 (200/400)	8 – 16	7.3	16	45	19	25.6	9	N/A
MLS 12/24 (300/600)	12 – 24	11.3	24	45	19	33.5	21	N/A
MLS 15/30 (375/750)	15 – 30	14.2	30	45	19	39.4	35	N/A
MLS 20/40 (500/1000)	20 – 40	19.1	40	45	14.5	45.3	51	N/A
MLS 24/48 (600/1200)	24 – 48	23	48	45	14.5	51.2	93	N/A

Multi Sized Inflatable Bypass Pipe Plugs
Part #	Range Inches	Min Inches	Max Inches	Infl. Pressure PSI	Back Pressure PSI	Length Inches	Weight (lbs.)	Bypass inches
FXBP 02/04 (50/100)	2 – 4	1.8	4	30	26	12.9	2.6	1/4
FXBP 03/06 70/150	3 – 6	2.6	6	30	26	15.75	3.3	1/2
FXBP 04/08 100/200	4 – 8	3.5	8	30	11	19.7	5.7	1
FXBP 06/12 150/300	6 – 12	5.5	12	30	11.5	22.85	9.9	2
FXBP 08/16 200/400	8 – 16	7.3	16	30	11.5	26.8	18.7	2
FXBP 12/24 300/600	12 – 24	11.3	24	30	11.5	33.5	41	3
FXBP 15/30 375/750	15 – 30	14.2	30	30	14.5	39.4	81	3
FXBP 20/40 500/1000	20 – 40	19.1	40	30	14.5	47.5	121	4
FXBP 24/48 600/1200	24 – 48	23	48	30	13	55.2	132	4
FxBP 30/60	30 – 60	26	60	30	13	102.5	253	6
FXBP 40/80	40 – 80	39.5	80	30	13	122	520	6
***MultiSize Inflatable Pipe Plugs are also available in a more chemical resistant nitrile rubber quality

Custom Multi-Size Inflatable stoppers

We can design the multi-size inflatable stoppers to your application. Special lengths, expansion ranges, bypass length and diameter.