Which method is NOT commonly used for the acceptance of PVC pipeline used in sewers?

The method that is not commonly used for the acceptance of PVC pipeline in sewers is bacteria testing. PVC pipes are typically evaluated through mechanical and physical testing methods that assess their structural integrity and functionality, whereas testing for bacteria is more relevant to water quality assessments in drinking water systems rather than for pipeline acceptance.

Deflection testing, leakage testing, and visual inspection are all standard practices for ensuring that the installation meets the required specifications and performance criteria. Deflection tests check if the pipe maintains its shape under specified loads, leakage tests ensure that there are no undesirable leaks at joints or along the pipe, and visual inspections are performed to confirm that the installation was executed correctly without any visible defects. These methods are crucial in evaluating the condition and reliability of the sewer pipelines, ensuring that they perform effectively in their intended roles.