Multi-Size Inflatable Pipe Plugs / Flow Stoppers

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COB Industries now offers Multi-Size Inflatable Stoppers in a larger range of sizes with the NEW MLS (Stoppers) and FXBP (Bypass Plug) models. MLS and FXBP 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.

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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 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
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Multi Sized Inflatable Bypass 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 1/2 or 1
FXBP 03/06 70/150 3 – 6 2.6 6 30 26 15.75 3.3 1-1/2
FXBP 04/08 100/200 4 – 8 3.5 8 30 11 19.7 5.7 2
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 4
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
***This product is also available in a more chemical resistant nitrile rubber quality