Now not any two system will look the same. Only the boiler is factory made, the rest is done by the installer himself. However for the most part, you will have the parts. One very important thing that I missed in the video. When adding water, it’s a good idea not to add too much at once.
If you are planning on doing any work on you boilers like changing valves, expansion tank or really anything that has to do with the water you will need to turn off the water supply to the boiler. More than likely this will be a 1/2 line with a single valve. Try looking for the regulator valve.