McDonnell & Miller 343500 Bellows Assembly R-410A Internal Check Valve: Eliminates the

Internal Check Valve: Eliminates the need for external piping in reverse-cycle heat pump configurations

ensuring tight shut-off and downstream protection when appliances are not in operation

Can this valve be used for LP and natural gas

and pump control circuits

crucial for preventing liquid slugging and maintaining system efficiency

McDonnell & Miller 343500 Bellows Assembly R-410A Internal Check Valve: Eliminates theWhen you are servicing a 64 Series low water cut off, the McDonnell & Miller 343500 Bellows Assembly (Model SA64 2) is the standard issue component required to restore essential boiler safety functions. This authentic replacement bellows assembly is engineered for heavy duty steam boiler control, specifically bridging the gap between the internal float mechanism and the electrical switch. As a direct fit part for 64 Series LWCO and 764 models, it