Setra 231GRS13MD Trans 321702-401 The standard replacement part is

The standard replacement part is the JB K1-E 3/4" fiber drum adapter seal

Common indicators include a furnace that cycles through the startup sequence without the burners lighting

or ventilation equipment

Durable Construction: High-grade materials resist corrosion and handle the high temperatures of discharge lines

Is the 624625R compatible with older 624625 units

Setra 231GRS13MD Trans 321702-401 The standard replacement part isThe 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