How can one prevent leaks in threaded pipe joints?

Using tape or thread sealant on the threads is an effective method to prevent leaks in threaded pipe joints. This is because the tape or sealant fills in the microscopic gaps that can exist between the threads, creating a tighter seal and reducing the potential for fluid or gas to escape. The adhesive properties of thread sealants or the compressibility of Teflon tape help in ensuring that connections are both secure and leak-proof.

Thread sealants are specifically formulated to withstand the pressures and temperatures that are typical in plumbing and piping applications. They also help prevent corrosion between the metal threads, which can lead to further sealing issues over time.

While lubricating the threads with oil might make it easier to put the pipes together, it does not provide the necessary seal against leaks. Tightening the threads excessively can lead to stripping of the threads or breaking, resulting in more leaks rather than preventing them. Using a heat source, on the other hand, is not a standard practice for threaded joints and might cause damage to the pipes or fittings without effectively sealing them.