The answer to 'drain trap rusty water' is that a rusty drain trap is a common plumbing issue that can indicate a larger problem with the pipes or water supply. Rusty water in the drain trap is usually caused by corrosion within the plumbing system, often due to old or low-quality pipes. This can lead to discolored, smelly water and even potential health risks if the water is used for drinking or cooking.
In many cases, the rusty drain trap is just a symptom of a more significant issue, and it's important to identify and address the root cause. This may involve replacing corroded pipes, addressing hard water issues, or resolving other water quality problems. While a rusty drain trap can sometimes be fixed by cleaning or replacing the trap itself, it's generally recommended to have a professional plumber evaluate the entire plumbing system to ensure the problem is properly diagnosed and resolved.