Includes: -replacement of delta monitor shower cartridge Replace Stack assembly, piston and seal and spacer kit for existing water system After arriving to l looked over the replacement materials supplied by the water system manufacturer, I proceeded to shut the water off to the home and removed the mechanical head from the iron removal system, followed by disassembling the head and removing the piston and stack assembly, I then replaced the piston and stack assembly followed by reinstalling the mechanical head and returning water to the home, after purging the system of air and putting the system back into service everything is functioning properly and free of failure