We have a Utica MGB125HD gas boiler that was installed in 1999. Having just replaced our hot water heater I thought I better check on this. I did some searches but couldn't find specific information for this boiler. What I did find said the average life of a traditional gas boiler is 10 - 15 years. This has me concerned since we are at 19 years. I would appreciate any feedback on this. Are we overdue for replacement?