Most residential water heaters in Seattle last 8 to 12 years, though that lifespan can stretch to 15 years or more with proper maintenance and favorable conditions. Your system’s longevity depends heavily on local water quality, installation practices, and how well you maintain the unit throughout its service life.
Seattle’s relatively soft water gives homeowners an advantage over regions with hard water, but our unique environment presents other challenges. Seasonal temperature swings, occasional freezing conditions, and the sediment naturally present in Pacific Northwest groundwater all influence how long your tank or …










