Setra 231GRS13MD Trans 30067439-890 While the EF17BZ273 is the

While the EF17BZ273 is the valve body itself

The 1092-SG uses standard baseplates common to Webster and Allanson series ignition systems

making it ideal for systems with high-draw accessories like smart thermostats or multiple zone dampers

000 BTU to cover residential and light commercial heating loads

Setra 231GRS13MD Trans 30067439-890 While the EF17BZ273 is theThe Setra 231GRS13MD is a professional grade wet to wet differential pressure transducer designed for rapid field deployment in HVAC hydronic systems and process control. This multi configurable unit features remote sensors with a conduit connection, eliminating the need for complex copper piping runs back to the transducer body and reducing labor by nearly a third. Built for heavy duty energy management systems, the 231GRS13MD includes an LCD display