The Pentek 163501 is the correct replacement ballast for the following water filter systems:
The Pentek 120 Volt UV Ballast for UVS-110-1 System is a replacement ballast for the Pentek UVS-110-1 Ultraviolet Water Filtration System, as well as the UVS-110-1 systems from Ametek, American Plumber, Pura, and US Filter. This UV power ballast operates at 120V/60Hz and only needs to be replaced when it breaks. This Pentek 120 volt ballast ensures the proper flow of UV light for sterilizing your drinking water and does not have a fuse.
Pentek 120 Volt UV Ballast for UVS-110-1 System specifications: