To properly tighten a mission band or Fernco coupling, the torque wrench should be set to which pressure?

To properly tighten a mission band or Fernco coupling, the torque wrench should be set to which pressure?

• A. 60 psi
• B. 30 psi
• C. 120 psi
• D. 10 psi

Answer: (A)

Tightening a mission band or Fernco coupling relies on applying a specific clamping force through the torque setting. The clamp must press the gasket evenly enough to create a watertight seal, but not so much that the rubber is crushed, the pipe is damaged, or the threads are stripped. A mid-range torque, around 60 psi, provides that balance for typical sizes. If you set it too low, such as 30 psi, the joint won’t seal properly and may leak. If you crank it too high, like 120 psi, you risk over-tightening and damaging the coupling or pipe. The smallest setting, 10 psi, would be far too loose to seal. In practice, follow the manufacturer’s specific torque value for the exact size and material being used, but 60 psi represents the appropriate balance for proper sealing without harming the components.

Tightening a mission band or Fernco coupling relies on applying a specific clamping force through the torque setting. The clamp must press the gasket evenly enough to create a watertight seal, but not so much that the rubber is crushed, the pipe is damaged, or the threads are stripped. A mid-range torque, around 60 psi, provides that balance for typical sizes. If you set it too low, such as 30 psi, the joint won’t seal properly and may leak. If you crank it too high, like 120 psi, you risk over-tightening and damaging the coupling or pipe. The smallest setting, 10 psi, would be far too loose to seal. In practice, follow the manufacturer’s specific torque value for the exact size and material being used, but 60 psi represents the appropriate balance for proper sealing without harming the components.