The JB K1-1 uses 3/4" NPS (National Pipe Straight) threads

including the MA-7203-500

Is a vent limiter included with the 325-5L-3/4

Oversized Outlet: The 2 inch FNPT discharge port allows for rapid pressure relief without restrictive backpressure

Aaon R76801 Motor Assembly Els PW 29614 The JB K1-1 uses 3/4"The Aaon R76801 Motor Assembly is a high performance 230V motor combination assembly engineered specifically for technical HVACR applications. As the direct replacement for Aaon R76800, this genuine OEM component ensures seamless integration into existing systems. Designed to drive blower and pump systems, it provides the torque and reliability required for heavy duty airflow and fluid circulation. This Aaon replacement motor package is comprehensive,