Aprilaire 310 Media R-448A Smith 100073333 Kit is a

Smith 100073333 Kit is a specialized FTX HI/LOW PRESSURE SWITCH KIT engineered for precise gas pressure monitoring in FTX600-850 heating systems

Look for the 'H' designation and the orange or tan color characteristic of Hytrel coupling inserts to ensure you are not using a lower-rated material for a high-torque load

This heavy-duty component features a durable steel gear train and a NEMA 1 rated housing

they are identical parts

High-Durability Construction: Designed as a heavy-duty limit switch to manage the rigorous thermal stresses found in modern furnace plenums

Aprilaire 310 Media R-448A Smith 100073333 Kit is aThe Aprilaire 310 Media is a high performance replacement air filter engineered to optimize your home's indoor air quality. Featuring a MERV 11 rating, this whole house air filter effectively captures 85% of pollen, 80% of mold spores, and 50% of dust particles as small as 1 to 3 microns. Designed for the Aprilaire 1310 air purifier and models 2310, 3310, and 4300, it utilizes patented Self Seal technology to eliminate air bypass, ensuring every cubic