What torque value (in inch-pounds) is required for cast iron no-hub bands?

What torque value (in inch-pounds) is required for cast iron no-hub bands?

• A. 30
• B. 60
• C. 90
• D. 120

Answer: (B)

No-hub bands seal by compressing a rubber gasket between the pipe ends with a steel band held tight by screws. The seal depends on applying the right amount of compression, which means using a specific torque value. For cast-iron no-hub bands, that torque is 60 inch-pounds. Tightening to this level ensures the gasket seats firmly and evenly, creating a reliable seal without leaving gaps. If you torque too little, the gasket won’t compress enough, and leaks can occur. If you torque too much, you risk squeezing or tearing the gasket, deforming the pipe ends, or stripping the screws, all of which can lead to leaks or joint failure. When installing, tighten in a cross pattern and use a torque wrench set to 60 in-lbs to achieve even compression across the gasket. In contrast, a much lower torque won’t seat properly, while much higher torques increase the risk of damage.

No-hub bands seal by compressing a rubber gasket between the pipe ends with a steel band held tight by screws. The seal depends on applying the right amount of compression, which means using a specific torque value. For cast-iron no-hub bands, that torque is 60 inch-pounds.

Tightening to this level ensures the gasket seats firmly and evenly, creating a reliable seal without leaving gaps. If you torque too little, the gasket won’t compress enough, and leaks can occur. If you torque too much, you risk squeezing or tearing the gasket, deforming the pipe ends, or stripping the screws, all of which can lead to leaks or joint failure.

When installing, tighten in a cross pattern and use a torque wrench set to 60 in-lbs to achieve even compression across the gasket. In contrast, a much lower torque won’t seat properly, while much higher torques increase the risk of damage.