Syscooling, at what pressure did you test the waterblocks for c1? psi, bar, kPa?
Need to know for my c1 & water boiler project!
0.3MPa.
Did you manage that with barb fittings still, or was that with compression fittings?
Sorry I don't know what is barb fitting or compression fitting

.We test pumps and radiators with air compressor,put them in water partly or wholly to see whether there is bubble getting out,whole process is about 10 seconds.