Running a new standalone leakshield for about a week. The system has been up and running for about 2 months with no leaks. My issue is the sytem seems to develop bubbles but not in one area. I have three drain valves in the system that work off of spring valves. https://shop.bitspower.com/index.php?rou…product_id=7139. These valves either had a bit of residual coolant present or were leaking. Could the negative pressure of the leakshield be causing these valves to open slightly allowing air in. With 400 mbar equal to almost 6 psi the valve could be possibly sucked open. This is just a guess but I cant see any other leaks.Anyone else run a leakshield with this type of valve.

Thank you for the information, It is very strange. I went into the menu and the Adaptive Pressure box was selected. My current negative pressure would sit around 420 and refill around 380. My current negative pressure sits around 399. The interesting part is that my required negative pressure dropped to 184. The only other setting I changed was I added in the data source to the pump speed from my Octo. I think I will monitor the system for a few days and see if it drops the current pressure to a lower setting over time. Hopefully solves the problem.

Thank you to both people who have responded. I really like both ideas. I was thinking of an o-ring , but was unsure of the size to use. It would definately work better then teflon tape.