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What is a condition for the approval of flow restrictors on vent piping?

  1. They must undergo annual testing

  2. Repair or replacement requires retrofitting

  3. They must be inspected every six months

  4. They can only be used in underground tanks

The correct answer is: Repair or replacement requires retrofitting

The condition for the approval of flow restrictors on vent piping is relevant to ensuring safety and compliance with regulatory standards. When it comes to flow restrictors, after any repair or replacement, retrofitting is necessary to maintain functionality and safety. This means that any modifications or updates made to the flow restrictor must adhere to current codes and standards, ensuring that they continue to prevent excessive flow and potential overflow or pressure issues. In scenarios concerning safety protocols, specific conditions must be adhered to for consistent operational integrity. This underlines the importance of maintaining and updating equipment in line with evolving standards and assuring that all elements of the venting system are compatible and effective after any changes are made.