Uploaded July 2025 | Updated September 2026, 2 weeks ago
In this hands-on demonstration of WETRAG with Viper from Refrigeration Technologies, Roman and Becca show Why You Need Heat-Blocking Putty and the critical importance of thermal conductivity protection when working with copper pipes in HVAC systems. Watch as they demonstrate how heat travels down copper pipes during brazing operations, potentially damaging heat-sensitive components like expansion valves, sensing bulbs, temperature sensors, and cables.
The team shows what happens when copper pipes are heated without protection - the thermal conductivity causes dangerous heat transfer that can burn through materials and create system failures. Then they demonstrate the solution: wet rag heat-blocking putty that effectively stops heat transfer and protects sensitive components.
This demonstration is especially important when working with dissimilar metals like copper and aluminum connections, where aluminum's lower melting point makes heat protection crucial to prevent bond failure and system leaks.
Key takeaways:
Understanding thermal conductivity in copper piping
Protecting heat-sensitive HVAC components during brazing
Proper application of heat-blocking putty
Working safely with dissimilar metals
Preventing system damage during installation and repair
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
In this hands-on demonstration of WETRAG with Viper from Refrigeration Technologies, Roman and Becca show Why You Need Heat-Blocking Putty and the critical importance of thermal conductivity protection when working with copper pipes in HVAC systems. Watch as they demonstrate how heat travels down copper pipes during brazing operations, potentially damaging heat-sensitive components like expansion valves, sensing bulbs, temperature sensors, and cables.
The team shows what happens when copper pipes are heated without protection - the thermal conductivity causes dangerous heat transfer that can burn through materials and create system failures. Then they demonstrate the solution: wet rag heat-blocking putty that effectively stops heat transfer and protects sensitive components.
This demonstration is especially important when working with dissimilar metals like copper and aluminum connections, where aluminum's lower melting point makes heat protection crucial to prevent bond failure and system leaks.
Key takeaways:
Understanding thermal conductivity in copper piping
Protecting heat-sensitive HVAC components during brazing
Proper application of heat-blocking putty
Working safely with dissimilar metals
Preventing system damage during installation and repair
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
