Before making final connections to a shower mixer valve, what is crucial to do?

Flushing the pipework to remove flux and debris before making final connections to a shower mixer valve is essential to ensure the system operates efficiently and without blockages. Over the course of installation, materials like flux used in soldering can accumulate in the pipes, and debris from the surroundings can also find its way in. If this debris is not removed, it can lead to several issues such as reduced water flow, potential blockages, and wear on the components of the valve, which could ultimately lead to leakage or failure.

Additionally, flushing the system ensures that contaminants, which may have been introduced during the installation process, do not hinder the function of the mixer valve. This proactive measure contributes to the longevity and reliability of the plumbing installation, making it a critical step before final connections.