Always verify that primary and secondary drain plugs are properly configured and hand-tightened with appropriate thread sealant to avoid stress fractures during installation

Can I use this in a return air plenum

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For technicians performing maintenance on legacy systems

Trane BRD1816 Circuit Board 319825-402 Always verify that primary andThe Trane BRD1816 (also identified by part number BRD01816 and alternate part number 0226463197) is a heavy duty Trane circuit board specifically engineered for high performance heat module and exhaust comparative enthalpy control. As a critical primary control component for commercial grade HVAC systems, this HVAC control board utilizes factory programmed algorithms to regulate sequence of operation, ignition timing, and safety circuit monitoring.