Primary–Secondary Pumping & Hydraulic Separation

Primary–secondary piping remains one of the most misunderstood concepts in hydronic systems. This course breaks down the logic behind hydraulic separation, closely spaced tees, decoupler bridges, and variable primary pumping using clear flow diagrams and real-world examples.

Attendees will learn how bridge flow affects supply temperature, why primary flow should exceed secondary flow, how mixing occurs, and when primary–secondary should and should not be used. The session connects theory to field reality, including common installation mistakes and troubleshooting indicators contractors see every day.