Greeted Thomas and proceeded to service the boiler with the triple savings combo package. I cut off power to the unit and drained the lines. I replaced the T/P valve to the indirect and replaced the water feeder. Third, I removed and replaced the boilers expansion tank with corroded âTâ and nipple fittings. I turned the water on and filled the system. Checked for leaks and all was good. Bled all the zones and fired up the boiler. I observed the boiler run, cycle and operate properly. Thomas was very happy with the service.