What needs to be clarified
Compare delivery time and temperatures by branch, separating source, circulation loop and local connection under documented flow and idle conditions.
Materials to prepare
- As-built supply, return and branch diagram
- Pump data, controls and pipe insulation details
- Tap waiting-time log with idle periods and flow
What to compare
Record temperatures at the source, accessible return and selected taps simultaneously. Log warming time and flow, repeating after comparable idle periods. Check dead legs, controls and visible insulation; compare pump sound with confirmed water movement.
Possible outcome of the analysis
Temperature plots and an affected-section diagram may define further observations and circulation checks where routing is concealed, without predetermining pump replacement.
Limits of the conclusions
A hot pipe near the heater cannot characterize a distant branch. Pump noise proves no flow; one draw-off cannot represent post-idle operation.