What is a common mistake made during the installation of systems with multiple appliances?

The common mistake made during the installation of systems with multiple appliances is often related to using oversized pipes. When ducts or pipes are too large for the system's requirements, it can lead to inefficiencies. Specifically, oversized pipes may not provide the necessary pressure and flow rate needed for optimal performance, leading to potential operational issues. This can compromise the functionality of the appliances connected to the system, as they might not receive the appropriate volume of water or other resources they need for effective operation.

Using a second tank could be strategically beneficial in certain cases to accommodate higher demand from multiple appliances, depending on the system's design and requirements. However, it is essential to ensure that the piping system is designed correctly for efficiency and effectiveness regarding flow and pressure — hence the emphasis on the importance of not oversizing pipes. Local codes and filtration systems also play crucial roles but are not inherently linked to the common mistakes identified in this specific context.