How can cross-connections in plumbing be effectively prevented?

Using a hose-bib vacuum breaker is an effective method for preventing cross-connections in plumbing systems. A hose-bib vacuum breaker is a device that allows water to flow in one direction and prevents backflow, which can occur if there is a reduction in water pressure. When installed at the outlet of a hose bib or faucet, it ensures that non-potable water does not siphon back into the potable water supply, thereby protecting the drinking water from contamination.

Cross-connections can lead to serious health risks as they create pathways for contaminants to enter the public water supply. By ensuring that there is a vacuum breaker in place, the water remains safe for consumption and meets health safety standards. Additionally, it acts as a physical barrier, further reinforcing the integrity of the potable water system.