What should all joints connected to male threads be treated with?

The proper treatment for all joints connected to male threads is to use compound or tape. This is because these materials are designed to create a seal that prevents leaks at the threaded joints. The compound or tape fills in the gaps between the threads, providing a barrier against water or any other substances that may flow through the piping.

Using compound or tape is particularly important in systems where the integrity of the connection is crucial, such as in sprinkler systems, where leaks can not only lead to water loss but may also impair the overall function of the system.

It is important to note that using oil, sealant, or acid is not appropriate for treating threaded joints. Oil may not provide an effective seal and could degrade other materials over time. Sealants might not be compatible with certain pipe materials or provide the same flexibility as compounds or tape. Acid has no application in sealing threaded joints and could potentially damage the threads or pipes. Thus, the use of compound or tape ensures a reliable and long-lasting connection in sprinkler fitting applications.