Equipment by Kupferle Foundry Company for maintaining quality water in your distribution system

Pipe Plugs

Pipe Plugs 4" - 40"

Plug up 4" - 40" holes with only 3 plugs. By far the least amount of plugs to accomplish the variety of sizing.

  • Only 3 plugs required to cover 4" to 40" pipe diameters
  • Convert 20" - 40" blocking plug to by-pass plug with a special by-pass kit
  • Higher back pressure resistance due to higher inflation pressure
  • Extremely durable due to unique construction

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Part No. Type Deflated Diameter Minimum Diameter Maximum Diameter Deflated Length Weight Inflation Pressure
102399 3D 4/10 3.62” 4” 10” 24” 3.3 lb 43 PSI
107086 3D 8/20 7.28” 8” 20” 27.56” 8.8 lb 43 PSI
102396 3D 20/40 19” 20” 40” 50” 35 lb 43 PSI

Back Pressure Ratings

Back pressure values in PSI as measured in clean, dry, steel pipe.

Pipe Diameter 3D 4/10 3D 8/20 3D 20/40
4” 40 PSI
6” 40 PSI
8” 36 PSI 40 PSI
10” 26 PSI 40 PSI
12” 40 PSI
14” 40 PSI
15 ¾” 37 PSI
18” 26 PSI
20” 18 PSI 40 PSI
24” 40 PSI
28” 40 PSI
32” 37 PSI
36” 27 PSI
40” 20 PSI