Originally Posted by GingerJohn
Yet with all those variables you are happy to specify a time frame for maintenance. Interesting.
It's my advice, though you're free to disagree and provide your own. From my experience using plasticizer prone tubing at six months time the tubing looks pretty bad. At the one year mark the tubing is practically pure white/gray by then affecting performance because of too many floating particles from plasticizing.
Perhaps it is time to try using a different tube or coolant?
Perhaps tubing when I've run out of whatever I have left but not so much for the coolant part, plasticizer wasn't really something discovered until more people got into watercooling only to find out there's a white film leaching out from the tubings after XYZ days of operation. Show me something better than distilled water and biocide and I will consider it, nothing has been proven to be more effective than this as you can't get anymore barebones than that for coolant. If you watercool chances are you have read this article before:
Edit: Just to be clear, I'm not saying that plasticizer isn't a problem and I'm not saying that you never have to clean the loop, what I'm saying is that there is no hard and fast rule for what time period is required between cleanings.
Well you were the one that insinuated that there is no need for periodic cleaning of loops. "I don't know where this concept of draining and cleaning your loop every so often comes from." Here you go again with rules, I am not the one declaring my advice as a rule that is you who is declaring it as so. A rule tells you what is and isn't allowed, my recommendation is advice based on my experience. Rules and recommendations are not the same thing.
I still stand by my recommendation considering if you're using tubing that is prone to plasticizing (which beginners may end up buying because of costs). If you're using that bad quality of tubing you may need to swap out the tubing much sooner than six months. Also consider the fact that not everyone has the same access to the same materials you do. You might be able to get access easily to plasticizer free tubing and distilled water but others may not be able to. We all don't live in the same country, county, city, province, state, etc... I learned from OCN that it's not that easy to get distilled water in some parts of Europe. Some have settled with deionized water and others have settled for bottled water because that's the best they could get. In the USA the majority of us can walk into any Rite Aid, Walgreens, CVS, Walmart, and practically any supermarket to pickup distilled water easily. It's not the same when you're on the other side of the world. I feel the OP's questions have been sufficiently answered and to continue on would only make us drift off topic.