which prevents false readings during temperature fluctuations in the mechanical room

24V natural gas valve features a standard 1/2-inch NPT inlet and outlet and comes factory-preset to 3

The 1" outlet is larger than the 3/4" inlet to accommodate the volumetric expansion of water as it is discharged

Its robust construction ensures long-term performance in closed-loop systems subject to thermal expansion and variable flow rates

3 frame size with highly durable sleeve bearings

McDonnell & Miller 317353 Valve R-410A which prevents false readings duringThe McDonnell & Miller 317353, specifically the Model TC L Test N Check Lower Valve, is a critical component for contractors maintaining hydronic systems. Designed for hot water boilers, this 1" NPT valve is engineered to simplify ASME CSD 1 code mandated testing of low water cut offs (LWCO). By replacing standard 1" crosses in the equalizing lines, the TC L allows for the isolation of the float chamber during blow down procedures without requiring a