To plug a PVC drainage pipe, first turn off the water supply and drain the system. Use a rubber stopper, PVC end cap, or a threaded adapter that matches the pipe diameter. Apply PVC primer to the pipe end and cement, then firmly press the plug or adapter into place. For larger pipes, reinforce with a steel wool backup and additional cement. Test for leaks by refilling the system slowly.

Proper sealing is critical to prevent water damage, structural collapse, and environmental contamination. Research by the American Water Works Association (AWWA) shows that 60% of pipeline failures in municipal systems result from poor joints or improper closures, costing billions annually in repairs. PVC’s rigidity requires precise fitting to avoid stress cracks, which occur when mismatched components or inadequate priming create weak points. For example, a 2021 study in Journal of Hydraulic Engineering found that 45% of plugged PVC pipes failed within five years due to improper installation, often from skipped primer application. Additionally, the EPA notes that unsealed pipes can allow pathogens or chemicals to infiltrate groundwater, violating Clean Water Act standards. Using manufacturer-approved plugs ensures compatibility, while testing under pressure (typically 50 psi for 24 hours) validates integrity. Neglecting these steps risks exponential repair costs and safety hazards, as seen in a 2020 California case where a misplugged agricultural drainage pipe caused $2.3 million in flood damage. Thus, methodical execution and adherence to engineering guidelines are essential for durability and compliance.