This replacement by-pass plug takes the place of the filter cartridge in US (Under Sink) or high capacity WV (Whole Vehicle) Filter Systems, allowing for easy winterizing and line sanitizing.
This plug is included with the original filter kit.
With the plug in place, anti-freeze can be pumped through your water system for winter storage.
For santizing, the filter can be removed and replaced with the bypass plug while cleaning solution is pumped through the system.
After flushing, the filter cartridge can be replaced.