the 006872F is a primary inspection point to ensure the power interface is functioning

Can I use this tee with R410A systems

Industrial Grade Durability: Constructed to resist oxidation and thermal stress in high-demand HVACR systems

and PDP series

For technicians performing seasonal maintenance

Reznor 121275 Block the 006872F is a primaryThe Reznor 121275 Stack Flue Block is a high limit safety component engineered specifically as an Energy Cutout Device (ECO) for commercial and industrial gas fired heating units. Designed to monitor the integrity of the ventilation system, this blocked vent switch acts as a critical failsafe by measuring exhaust temperatures at the flue. If the sensor detects a restriction, backflow, or overheating condition where temperatures reach the 275F trip