Well, it's been a while folks. I'd like to say that I've made or am going to make drastic and exciting changes to the system.....but in all honesty I've done nothing but get on and use it (work and gaming) since 2017. I'm resurrecting this thread solely because
Drain number 30?
Nope, 31....and it wasn't planned this time either. Was minding my own business, getting in a bit of gaming when something started beeping. Slightly annoyed, I looked left and spotted the reservoir fill-level graph taking a nosedive. Quick check through the window (handy things it turns out!) and there's coolant welling out of the graphics card and making a beeline for the PSU!
Good job there isn't 880ml in the res and a good litre in the rad to follow it eh?! *facepalm*
After the panic, the kitchen roll (all of it) and drying the carpet* this is what the problem was:
These are Barrow acrylic stop plugs and I'd got one in the GPU to complement the acrylic tube coming in from the bottom, and one in the top of the res. Both had suffered the same issue - although the one on the res didn't actually crack through until removed. I've also had threaded acrylic tubes and filters from them - the former cracked (although I cannot rule out mechanical strain here) and the latter crazed so I replaced it with their glass version. Now I should point out that I have rather a lot of metal fittings by Barrow (extensions and angles mainly) and have had no issues with any of them.
Was going to just fill it back up once I'd dried the PSU - did I mention how glad I am that ignored the mounting advise and mounted it with fan downwards so that it presented a solid top to any coolant leaking from above?! Thought I may as well check it out with Dr Drop and found there was still a slow leak. Some testing and a res clean and rebuild later and it's air-tight again. Although it did save me from filling it with a loose fitting on the pump which could have been interesting!
Incidentally, the gauge on Dr Drops is very cheap and the slightest drop while you're using it (of while shipped) means that the needle points at some random point on the scale even when not connected. Manufacturer of the gauge says it isn't adjustable to re-zero it. That's not exactly true though. If you disassemble the gauge (two screws on back and then the case comes off) you can pull the needle off the spindle and put it back on reading zero. The scale won't be accurate anymore (ie 0.5 bar may only be 0.4) but it makes it usable again.
Also fixed some minor issues and cleaned a few things up. When the Aquaero got swapped out, the new screen was ever so slightly larger than the old one and the pressure caused it to bow. Filed the hole out a bit more to sort this out but the glue had gone along the top edge. Thought I'd get away with masking taping (Frog Tape) off the glass and just flowing some super glue into the edge. Nope, some got through the tape and now there's some crusty parts on the inside of the glass that I can't get rid of.
Quite a few of the blue LEDs have failed. They were set to fade blue to red with temperature of each componant but I've had to switch so they fade green to red instead....although this now clashes with the sleeving which is all in shades of blue. There may need to be an LED rebuild at some point.....although I suspect this may be in the same sort of timeframe as Brexit!
Another couple of litres of XSPC EC6 from OCUK have refilled it with nice clear coolant again. It seems to go yellow with age and also, I suspect it may not be as non-conductive after a couple of years....and this seems to be an important feature the way things are going!!
In writing this, I've also just realised that there's another of these same time-bombs on the bottom of the GPU....so replacing that'll be fun now that I've filled it again!
So, yeah. The point of this was really to say that if you have any of these fittings, either replace them or at least check them for signs of impending doom!
*I still stand by the wise advice a friend of mine gave me: "When it leaks all over your carpet, are you going to want a clear, colourless stain or an alien green one?!"