Mueller® H-17440 Unit No. 4SW Stopping Machine

Catalog number: H-17440


  • Hand operation
  • Used to stop-off 10" and 12" Line Stopper Fittings
  • Body has integral 4" CL300 flanged bypass connection
  • Used in conjunction with Control Valve – 14" Gate Valve (83318)
  • Includes Operating Instruction Manual (Form 8972)
  • 500 psig (3450 kPa) maximum working pressure at 100F (38C)
NOTE: The working pressure or temperature rating is reduced accordingly if any attachment, valve, or fitting subjected to pressure or temperature during the drilling, stopping or completion operations has a maximum working pressure or temperature rating less than that specified above.

Order Separately:

  • Eyebolt (63846
  • 1-11/16" Open End Wrench (49211)
  • 2" Box Offset Pattern & 2" Open End Wrench (49212

Catalog PDF



Demonstration Video

MUELLER NO-BLO® Operations performed by the MUELLER 89430 Stopping Machine:


Size* of Fitting

Mueller NO-BLO Operation

Mueller Line Stopper Fittings



Stop off fitting

*Nominal size

Stopping machine repair parts drawing.

NOTE: These illustrations are for parts identification only. DO NOT use these illustrations for assembly or disassembly of machine. Mueller Co. offers a machine repair service. Contact Mueller Customer Service Center for details.