Lochinvar & A.O. Smith 100189054 Collar 319848-301 this unit operates within a

this unit operates within a 0-200 PSI range

the barbed fittings must be swapped for compression fittings

ensuring a reliable fit for older 115V furnace and AC units

depending on the specific actuator and packing selection

Enhanced Fail-Safe Protection: The spring return mechanism provides consistent normally open status to prevent stagnation or freezing during power interruptions

Lochinvar & A.O. Smith 100189054 Collar 319848-301 this unit operates within aThe Lochinvar & A. O. Smith 100189054 Collar is a precision engineered 4" flue collar essential for maintaining the structural integrity of high efficiency venting systems. As an OEM component, this kit provides a secure, gas tight transition between the appliance and the exhaust infrastructure, preventing hazardous leaks and ensuring optimal draft performance. This specific part is a direct replacement for legacy units, as 100189054 is identical to