TB Woods 6H Insert R-410A This ASME Section IV certified

This ASME Section IV certified valve is a standard replacement for HVAC contractors maintaining large boilers where reliable thermal expansion protection is non-negotiable

Its primary function is to prevent burner operation if the flue pipe is obstructed or if the inducer fan fails

F and closes once the plenum temperature drops by 50

it provides the rigidity necessary to maintain proper HVAC belt tension and mitigate energy loss due to slippage during high-torque startup sequences

It is an authentic Weil McLain OEM replacement part

TB Woods 6H Insert R-410A This ASME Section IV certifiedReplace worn or failing coupling elements with the TB Woods 6H Insert, a high performance Hytrel sleeve engineered for extreme torque applications and harsh operating environments. This single piece solid Hytrel insert is specifically designed for size 6 Sure Flex Plus couplers, offering a rated torque of 1,800 in lbsa significant upgrade for heavy duty drive systems. Unlike standard EPDM or Neoprene sleeves, Hytrel material provides superior chemical