What can be a result of using fittings unsuitable for the pipe material?

Using fittings unsuitable for the pipe material can indeed lead to potential leaks and system failure. This occurs because different materials expand and contract at different rates due to temperature changes, and they often do not bond correctly. For example, if metal fittings are used with plastic pipes, the incompatibility can create stress points which may eventually result in fractures or leaks. Furthermore, improper connections can interfere with the integrity of the plumbing system, causing catastrophic failures, disruptions to service, or even water damage. Ensuring that fittings match the pipe material is crucial for maintaining a reliable and functional plumbing system.