Just read about half of this, after a mishap with my first fully self-built loop (skimped on tubing, now seeing buildup in res)
As I've been reading, I see a lot of back and forth over which manufactures are no good, which products have failed, but I'm still fuzzy on any clear answers.
One issue I saw described here and elsewhere was a clouding of DEHP-free (non-placticizer) Tygon E-1000.
My concern was, as I read through the spec sheet on E-1000, I realized it is only rated for 125F, 52C.
In fact, ALL of Tygons food-grade tubing is rated similarly.
While I know my machine hits below that frequently, I'm sure any lengthy heat-soak with Prime95 to test an OC, or a machine running in less than ideal circumstances will pump hotter than 52C fluid out of the GPUs or CPU... at which point, we've exceeded the rating of Tygon food and beverage hoses.
I'm not sure what the original purposes of most of the hoses we use are, but unless I'm mistaken, it would be unwise to consider any hose with DEHP -and- an operating temperature rating that meets or exceeds the maximum temps we could expect our CPU to pump out (I'm thinking a 100C rated hose would offer more than enough head room to avoid breakdown of the material and hazing of the hose?)
With that in mind, I found spec sheets on Tygon E-1000 DEHP-free food and beverage hose, and a lab-spec DEHP-free hose from them labeled E-LFL:
While I scramble to fix my issue before it gets out of hand, and prepare for a breakdown of my system and cleaning out of my res and block, I am seriously considering *lab-grade* tubing over food-grade if I can find a supplier. E-LFL looks promising (rated for 165F, 74C operating temperature, non-placticizer). But I'm aware this will be VERY expensive. I'll keep looking for competitors in Lab-grade, high temp, crystal clear, chemical resistant tubing. Of course, the long-term usage may become a factor too.
Has anyone actually called Tygon or one of the other long-standing lab/food grade tubing manufacturers and asked them what their tubing lifespan is? Operating temp and DEHP is obvious, but longevity not so much...
Oh! I'll post pics of the damage when I do the tear down!
Cheap off-brand tubing, Mayhems Blood Red X1 + Deep Red dye (and lots of it), tubing leeched after the dye was added a few weeks after the start of the build, but I also started OCing it then, and may have also exceeded the operating temperature of whatever this junk is. No notable discoloration or hazing of the tube *yet*, just sediment on the bottom of the res and some gunk buildup on the res window.