Newell Gurus

Hello Gurus,
As I continually crawl around the bays of my 1995 Coach # 385 I find more and more things I do not have manuals for, or have questions about.  I was in the water bay checking out the 2 12 volt pumps, shut offs and discovered 2 water filters.  One was a "sanitizing filter" with what  look like a timer on top and a drain thru the bottom of the coach, and the other is a sediment style filter which I found out later searching thru threads on this wonderful site.  At this time I see no other filters like is mentioned in other threads like everpure or THM.  I have ice, and instahot that I would like to rely on. 
 
Does anyone have the manual for the white canister filter and /or know the procedure for sanitizing it?
Is there a better system that can be added, if it really needs to be?
I see external portable systems used, are these worth it, since the water is still going into your tank?  Are you constantly fighting/sanitizing your system.

All help is appreciated.  Lets hope the filter was changed more recently.

I don't have a manual for the sanitizer, but it is supposed to be operated for a flush cycle periodically. Be careful, if the valve or seals are bad and you run a cycle, it may never close and leak all over your bay. Don't ask me how I know that.

It's a permanent filter. Sort of.

Yeah, I had the same filter. Backflushed it per the instructions and it leaked like crazy from then on. It went bye bye soon after.