Pressure Testing Liquid-Cooled Server Racks: Why Connectors Fail Before Cold Plates

In direct-to-chip liquid cooling, the cold plate is rarely the first thing to fail; it’s the connectors, seals, and threaded ports around it. In this interview with The Data Center Engineer, P+P Managing Director Philip Claussen explains why burst testing, pressure cycle testing, and leak testing at the full-assembly level — not just component checks — are essential for validating liquid-cooled server racks under real-world pressure transients such as water hammer.

Drawing on validation logic proven in automotive and aerospace, Philip explains why data center hydraulics demand the same rigor as more extreme industrial environments: leak-tight connections near electronics, pressure-cycle profiles that mimic years of pump and valve operation, and burst margins that hold up as rack densities rise. He also shares P+P’s take on assembly-level pressure and leak testing under real-world environmental conditions, and one blunt design rule for OEMs: engineer every connection as if it were the product.

Read the full interview → thedatacenterengineer.com
Watch the video → youtube.com/watch?v=arXty72OiQ4