Ive drank my water since 2006. Never had any problems but then in june 2010 Ive had cramps from drinking it. It took me about a month of observation to conclude that its from drinking the tank water. Tanks can get dirty, and accumulate bacteria. My membranes were clean. I was getting good product flow and production. I flush with product after every batch. I also take out prefilters (20 and 5 micron) and put them out to dry after every batch. Its just one of those things that are hard to track. Why was I getting cramps all of a sudden. Not much changed in production, salinity, or my habit of consumption
That year I didnt drink my RO water. In the fall i left bleach in the tanks and winterized the membranes(both sides) in -100F antifreeze
. The following season i was drinking it w/o a problem.
I would agree with your assesment that RO water right after the membrane is cleaner then your home water. But after its been sitting in the tank for few days or a week, it could get contaminated. For me its not feasible to add bleach in my tanks. My electrical budget
can afford a 10W element. That's under 1A continuous 24/7. I could care less if the water gets hot. I'm sure after a bit of running it would be fine. So to me putting the UV sterilizer just before the facet in the galley
seems like a reasonable piece of mind.