To proactively address rust issues, consider installing a water softener to mitigate mineral deposits that contribute to rust stains. Implement routine cleaning with a mild detergent and a soft cloth to prevent the accumulation of rust over time.

In the event that rust stains have already appeared, turn to white vinegar, a universal plumbing remedy. Pour a substantial amount into the bowl, ensuring comprehensive coverage of the stained areas. Allow the acidic properties of vinegar to work for a minimum of 30 minutes. Following this, employ a plumbing-grade toilet brush to scrub away the stains and flush the toilet. For more persistent rust, repetition of the process may be necessary, or utilize a plumbing-friendly pumice stone for gentle yet effective rust removal.

Baking soda, a plumbing-approved household item, can also be harnessed to combat rust stains. Create a plumbing-safe paste by blending baking soda with water and applying it directly to the affected areas. Allow it to sit for 15-20 minutes, followed by plumbing-grade scrubbing and flushing. Baking soda ensures rust elimination without compromising plumbing.