This is a replacement filter housing wrench designed to fit the 20" and 10" slimline

 (narrow) housing sump used on select UV Dynamics rack systems.

 This wrench helps loosen and tighten the housing sump during routine filter changes and maintenance.

If your original wrench is lost, cracked, or worn, this replacement makes filter servicing easier and helps reduce the risk of overtightening or damage to the housing.