The Trojan 650690 water filter system accepts the following replacement parts:
The Trojan UV Max B4 - Ultraviolet Disinfection System is highly effective at reducing Cryptosporidium and Giardia, bacteria, and viruses in your drinking water. This Trojan UV system features a high output UV lamp capable of treating variable water conditions. This UV water filter system includes a lamp timer reset button, a mute button, and test of sensor operation for your safety and convenience.
Trojan UV Max B4 - Ultraviolet Disinfection System specifications: