What should be done if the coupling is not free of dirt during installation?

Cleaning the inner surface of the coupling before installation is essential for ensuring a proper seal and preventing leaks. Dirt and debris can interfere with the coupling's ability to fit securely, which may lead to issues such as hydraulic failures, pressure losses, or even complete system failures. The integrity of the coupling depends on the surfaces being clean and free of contaminants, allowing for optimal contact surfaces that promote effective sealing.

Furthermore, applying lubricant without cleaning would not address the problem of contamination that could still compromise the effectiveness of the seal. Proceeding with installation while ignoring the dirt would risk various complications, including potential damage to the system or the coupling itself. Performing a pressure test is typically done after installation to verify the integrity of the system, but does not prevent issues that may arise from a poor installation due to dirt or debris present while fitting the coupling. Thus, cleaning the inner surface is critical to ensure the reliability of the connection and the entire distribution system.