Bump

Hello redterror, 
 
Usually with water cooled systems the maintenance is fairly simply, you don't necessarily have to drain all the fluid to clean it unless want to or the water gets dirty (which is unlikely). The most important things you want to do to keep your loop functioning well would be to clean out the radiator fins with compressed air, reapply thermal paste when needed and top off the fluids here and there. Otherwise, it's good to hear that your system is stable and cool. 

Your post wasn't deleted. Like I said in your general discussion thread, you have to view more than the past 30 days.  :-)
 
This is the only post I see in here from you, so I am guessing this was the one you were referencing?

Are you using the stock tubing?
I will tell you right now that using a similar setup (but with non-stock tubing) I've been running for about that long and I'm nowhere near that level of drainage. Make sure your fill port is sealed tightly as it could be seeping air out that normally would condense.  If it persists go to Home Depot and pick up some 3/8 x 1/2 tubing. It can't hurt, and it's like $5 for 10 feet.
 
Either way, refill as necessary. A complete drain, probably along the order of six months is about what I would expect with treated coolant. If you're running plain old distilled water with some antimicrobial, a bit more common couldn't hurt.

I rebuild very frequently but that has more to do with the upgrade itch than anything. If your loop's assembled right, you shouldn't have to rebuild it unless totally necessary.

redterror
Thanks for the response. I am indeed using the stock tubing / fittings from hell - were you having any issues with it? Maybe it could account for the evaporation? I've tightened the port and most of the fittings without putting too much stress on the plastic.
 
I've been refilling every few months and checking for leaks regularly since replacing the original radiator last year. I refilled the reservoir a little over a month ago and notice about a 3mm level drop. By using EKWB's red coolant (similar if not the same to X1) I have noticed some red dust throughout the case so I definitely know water is getting out somehow but believe it's just a small amount of evaporation through the tubing or maybe a seal somewhere. Keep in mind that I do also run my computer every day for 12 - 20 hours and know that there's quite a few variables to keep in mind which is why I thought to ask other HH owners.
 
That being said, I have been looking into upgrading to the 1080 hydro copper so I might redo the whole loop again anyway lol.

Yes, like many others I had one heck of a time getting those fittings on.

I ditched those and use these instead: http://www.frozencpu.com/products/23497/ex-tub-3020/Phobya_G_14_Thread_38_ID_x_12_OD_Hex_Base_Compression_Fitting_-_Silver_62076.html?tl=g30c409s1032#blank

You tighten them with a 17mm and 18mm wrench. They're pretty long however. Your other option is to ditch the fittings and tubing entirely and look towards an alternative solution like EK ZMT or different sized fittings. I used 1/2 x 3/4 fittings waaaay back and they could be locked down with very little to no torque.

Cheapest solution: Ditch the stock tubing (and invest in bandaids)
Most convenient solution: Ditch the stock tubing and fittings

As for the evaporation issue, I'd like to again give you a heads up to tighten the fill port on the reservoir. Also, you could be having tiny cracks in the acrylic of the reservoir. The inlet port isn't very sturdy, and I'd find it easy to strip the threads enough to let air in. So you're probably looking at that. You can confirm this once you've tore down the system by running the outlet to the inlet and filling with a bit of water and running the pump by itself for some time.

I wish you the best of luck on your endeavours! Let us know what you find out.