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the Model 221 features a 3/4" NPT connection and a robust mounting flange designed for an 8 1/2" bolt circle with six 17/32" holes
3mm) quick connect tabs for easy wiring in chassis mount configurations
R-410A Compatibility: Factory-rated for high-pressure applications with advanced bi-metal durability
and flame signal strength
Key Benefits Universal SPDT switching allows for both heating and cooling or high-limit cutout applications
Resideo PV-020RP Top Assembly 320735-701 the Model 221 features aThe Resideo PV 020RP Top Assembly is a high performance replacement vent head engineered specifically for PV Series SuperVent air eliminators. Designed for horizontal mount air vents, this 90 degree vent top features a precision engineered automatic float mechanism that effectively manages the continuous removal of microbubbles and gas pockets from hydronic heating and cooling systems. By facilitating consistent air elimination, this OEM component
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