Cast iron no hub bands shall be torqued at _____ inch pounds.

Cast iron no hub bands shall be torqued at _____ inch pounds.

• A. 30
• B. 60
• C. 90
• D. 120

Answer: (B)

Tightening cast iron no-hub bands requires a specific, moderate torque to properly compress the gasket without risking damage to the pipe. This level of tightness ensures a solid, watertight seal while avoiding cracking or deforming the pipe or the band. The correct practice is to use a calibrated torque wrench and tighten in a crosswise pattern, verifying that the joint seats evenly before declaring it complete. Too little torque won’t seal, while too much can crush the gasket or bend the pipe, so the standard, middle-range setting is used to balance sealing with safety.

Tightening cast iron no-hub bands requires a specific, moderate torque to properly compress the gasket without risking damage to the pipe. This level of tightness ensures a solid, watertight seal while avoiding cracking or deforming the pipe or the band. The correct practice is to use a calibrated torque wrench and tighten in a crosswise pattern, verifying that the joint seats evenly before declaring it complete. Too little torque won’t seal, while too much can crush the gasket or bend the pipe, so the standard, middle-range setting is used to balance sealing with safety.