That's up to them. If you clean it thoroughly to begin with and use the correct fluid you shouldn't have too many issues. I'll be changing my fluid at some point maybe after the new year, it's been in the loop since September 2016 with no issues. I'll probably run some blitz through it, rinse and refill.
Lot of scaremongering with water cooling but imo the benefits outweigh the cons.
I watch many YouTube programs one is called "A Beginner's Guide to Water Cooling Your Computer" they say don't use a colour as this will block you pump only use the colour tubing anyway too much crap on the youtube channels these days, one says one thing another say another this can get very confusing on what is the best way and what to use, as I never watercool before there is always going to be the question in the back of my mind what if it leaks! they make it look good in their video in a new system build, but how many mistakes did they have when they first started? but did they use a new system or old one that part is never shown
Yes it all look very cool in a new system and now you can buy the kits but there is still that "question" just like AIO,
If we sept back in time we only had fans now we have Air, Water, AIO, and some new crazy way of Mineral Oil, and now liquid nitrogen what will be next? anyway I thank you for taken the time and explaining to me but for now I will stay with Air until someone invents a new way of cooling your computer with leak proof.