The A-port is engineered with an equal percentage flow characteristic via a specialized Tefzel flow characterizing disc

the 668375301 features terminals designed to interface with 10k ohm NTC remote sensors for averaged or remote-area temperature monitoring

providing the necessary low-power signal control to switch the fan on or off reliably

leak-free connection to sensing lines

The bellows-actuated design measures net oil pressure by calculating the difference between the oil pump discharge and the crankcase pressure

Weil McLain 382-200-411 Gas Valve Kit R-410A The A-port is engineered withThe Weil McLain 382 200 411 Gas Valve Kit is a field proven solution for technicians servicing GV Series 4 high efficiency cast iron boilers. This critical fuel delivery component ensures precise manifold pressure regulation and stable combustion across varying firing rates. Engineered for seamless integration, the kit features a high performance direct spark ignition gas valve designed to maintain consistent BTU output while ensuring safety shut off