Flushing a 15-year-old water heater requires extreme caution and is generally discouraged by plumbers if the tank has never been maintained or flushed previously. At 15 years old, heavy layers of accumulated sediment at the bottom of the tank may actually be sealing micro-cracks or corrosion spots. Attempting to flush or scrape old sediment can dislodge rust seals, causing the fragile tank bottom to start leaking aggressively, meaning you should prepare for a full water heater replacement instead.
1 votes
Marked as accepted