This answer depends on the type of water heater you have and how you care for it. In general, most water heaters will not need to be replaced until they are at least 10 years old. Some types of water heater will last longer than others due to their quality and the way that they heat water. Regular inspections and maintenance can help extend a water heater's life by finding and stopping potential problems before they grow. Maintenance will also allow you to know when your water heater is nearing the end of its lifespan. Contact Crestway HVAC today to have your water heater inspected!