What is the recommended minimum distance a drain should be from a water supply pipe for proper plumbing design?

The recommended minimum distance that a drain should maintain from a water supply pipe is 12 inches. This distance is crucial for preventing contamination of the potable water supply by ensuring that any potential backflow or leakage from the drain does not come into contact with or enter the water supply line.

By maintaining a 12-inch separation, plumbing systems reduce the risk of cross-contamination, adhering to health and safety regulations. This standard distance also considers other factors, such as the type of drainage, the materials used, and the specific plumbing codes adopted in various jurisdictions. Proper spacing promotes effective drainage while safeguarding the integrity of drinking water systems, which is essential for overall public health.