CYLINDRICAL STOPPER

The Norco Cylindrical Stopper is an inflatable bag that may be inflated to a high internal pressure and will hold against as much as ten pounds pressure in the pipe.

The broad central zone makes contact with the wall of the pipe and holds against a higher pressure than other types of bags.

Cylindrical Stoppers inflated according to these directions will hold against a pipe pressure equal to 60% of the pressure in the bag. That is, a six-inch Stopper inflated to a pressure of fifteen pounds, will hold back about ten pounds pressure in a water main.

Use a gauge and watch it!

Cylindrical Stoppers should not be inflated over the pressure given on the direction card fastened to each Stopper. These pressures are:

  
  SIZE
  IN BAG
    TAP HOLE

  2"
  15 PSI
  1"

  3"
  15 PSI
  1"

  4"
  15 PSI
  1-1/4"

  6"
  15 PSI
  1-1/2"

  8"
  12 PSI
  2"

  10"
  10 PSI
  2"

  12"
  8 PSI
  2-1/2"

  14"
  6 PSI
  2-1/2"

  16"
  6 PSI
  3"

  18"
  5 PSI
  3"

  20"
  5 PSI
  4"

  24"
  3 PSI
  4"

  30"
  3 PSI
  5"

  36"
  3 PSI
  5"

  42"
  1 PSI
  6"

  48"
  1 PSI
  6"

Norco Cylindrical Stopper | . Cylindrical Stoppers for Sewers | . Cylindrical Stoppers for Water Main

Norco Manufacturing Co., Inc. • P.O. Box 371, Ridgefield, NJ 07657 • TEL: 201-854-3461 • FAX: 201-662-1967
EMAIL: purchasing@mainstopper.com