Softener emits a strong rotten‑egg or musty odor from the brine tank

Safety first: Wear gloves and eye protection. Ensure good ventilation when using disinfectants.

• Empty brine tank: Place the softener in bypass. Scoop out salt and brine into buckets. Dispose of according to local regulations.
• Clean tank: Wash the inside of the brine tank with warm water and a mild bleach solution (e.g., 1/4 cup household bleach per 10 L water). Scrub all surfaces and rinse thoroughly.
• Sanitize system: Many Nobel manuals describe a sanitization procedure using a small amount of bleach added to the brine well before a regeneration. Follow the manufacturer's instructions carefully.
• Refill with clean salt: Use high‑purity salt pellets and keep the tank covered to reduce contamination.