6352 Corte Del Abeto, Suite H.
Carlsbad, California 92011.
This item is not necessary for internal filter replacements. It is specifically designed as a wrench for pre-filter housings to make the process of changing external filters easier.
For full lab results on our Super Filters and filter performance, you can view the full independent lab report here.
All internal filters are designed to snap into place securely and easily. Pre-filters will require pre-filter housing.