The VID Fire-Kill Model C Valve Core Kit is a valve core and additional O-rings and gaskets prepared and shipped ready for installation into Model C-EL or Model C-EL-PA valves during the full valve service check.
The Model C Valve Core Kit is an optional kit created as an additional service and is therefore not strictly required for the full valve servicing, but greatly decreases the time and ressources needed for performing the Full Basic Service on the Model C valves.
