Sorry, tho the Monolitihic may be OK for some things it isn't a water purifying filter. When we say Berkey we mean Berkey Black filters by default vs. their own ceramic filters. Black are a bit more effective tho more fragile. When you compare their effectiveness vs. ceramic the Berkey wins and lasts a really long time. Add the white Flouride and Arsenic filters if you'd like as well...
I think you could take the liquid out of a latrine, pass it thru a Berkey, and drink it. Berkey is simply a better product and tho more expensive up front is an investment in quality and the long-term.