or obstructions in the flue vent

the standard flow direction is from Port B to Port A to ensure proper seating of the paddle and prevent water hammer

As a veteran-spec part

cast iron fittings in this class are typically used on hot water boilers

While the mechanical connection is the same

Emerson Alco 049474 Drier Shell Els PW 17895 or obstructions in the flueThe Emerson Alco 049474, model BTAS521SV, is a high capacity brass take apart suction line filter drier shell engineered for heavy duty commercial refrigeration and HVACR service. Featuring 2 5 8" ODF sweat connections, this shell is specifically designed to facilitate replaceable core or filter cartridge installation, providing the versatility required for both permanent protection and temporary system clean up following a compressor burnout. The