What is the primary purpose of a pipe joint compound?

The primary purpose of a pipe joint compound is to seal threaded connections and prevent leaks. When pipes are joined together, particularly with threaded fittings, there is a potential for gaps between the threads where water or other liquids can escape. The application of a pipe joint compound fills these gaps, ensuring a watertight seal.

This compound is designed to adhere to the surfaces of the threads, creating a barrier that resists the pressure of fluids traveling through the pipe. A good seal is critical in maintaining the integrity of the plumbing system, preventing leaks that could lead to water loss or other complications, such as water damage or mold growth.

While lubricating moving parts, reducing pipe expansion, and enhancing strength are important considerations in various plumbing applications, they are not the central function of a pipe joint compound. Instead, the focus is primarily on ensuring that connections between pipes are secure and leak-free.