The Trojan 650695 water filter system accepts the following replacement parts:
The Trojan UV Max D4 Plus - Whole House UV System features a high output UV lamp that purifies drinking water through the reduction of Cryptosporidium and Giardia, viruses, and harmful bacteria. This UV water filter system features sensor operation and indicator lights for your convenience. The UV lamp of the UVMAX D4 Plus system only needs to be replaced annually and even features a lamp timer display for an easy reminder.
Trojan UV Max D4 Plus - Whole House UV System specifications: