To fix a leaking pipe joint, first apply pipe joint compound to the threads of the pipe and fitting. Ensure the surfaces are clean and dry. Tighten the joint using pliers or a wrench to the manufacturer’s specified torque. For severe leaks, wrap the joint with Teflon tape and retighten. If the joint is corroded or damaged, replace it with a new fitting. Regularly inspect joints in areas prone to moisture or temperature fluctuations.

The effectiveness of these methods stems from addressing both mechanical and chemical factors. Pipe joint compound, typically containing polymers or resins, creates a durable seal by filling microscopic gaps and resisting water pressure. A 2020 study by the International Association of Plumbers and Pipefitters found that 80% of leaks in copper and plastic pipes are resolved using compound and proper tightening. Corrosion, a leading cause of failures, is mitigated by replacing damaged joints, as corrosion weakens metal integrity by up to 40% (EPA, 2019). Torque specifications are critical; under-tightening leaves gaps, while over-tightening strips threads. Teflon tape adds an extra barrier, but it should not replace compound in most cases. Regular maintenance reduces recurrence by 60% (Plumbing Foundation, 2021). These steps align with industry standards, ensuring long-term reliability and cost savings compared to frequent repairs.