Greetings,
Mr./Ms. C. I was recently obliged to service our Raritan. NOT a big job at all. Fortunately, I had the benefit of being able to flush "fresh" water through the works several times prior to disassembly thus minimizing contact with recent donations although some minor odors were present due to accrued deposits. Parts were available at WM although, as usual, "interestingly" priced. Follow Ms. Hall's advice. She knows her stuff.