Align the piping, established the joint at neutral length, utilize even bolt torque in a very star pattern, and ensure guides and anchors are put in to spec. Check out the Expansion Joint for virtually any sign of leakage in the connections and Look at the gauges for pressure drops. https://axial-expansion-joint-dia03579.review-blogger.com/60820879/5-essential-elements-for-hvac-expansion-joint