What is an approved method of repairing a leak in a PEX pipe?

Using a PEX repair coupling is the approved method for repairing a leak in a PEX pipe. PEX repair couplings are specifically designed to connect sections of PEX piping or to repair damaged sections without compromising the integrity of the system. They create a secure, watertight seal that maintains the flexibility and pressure handling capacity of the original PEX material.

In contrast, other methods such as rubber tape are not recommended for permanent repairs since they might not provide a long-lasting solution and can be susceptible to failure under pressure over time. PVC glue is unsuitable as it is designed for use with PVC pipes and does not provide a proper seal for PEX, which is a different material altogether. Soldering is also not applicable here, as it is a technique used for joining metal pipes, and PEX is a type of plastic pipe that cannot be soldered.