Lennox 12L02 Collector Box 321042-401 14 universal orifice

14 universal orifice

it requires a minimum operating pressure differential of 5 PSI to lift the diaphragm and allow flow

These are primary safety devices

making it a staple for contractors handling medium to large service applications

packaged indoor/outdoor

Lennox 12L02 Collector Box 321042-401 14 universal orificeAs a seasoned tech, you know that a cracked or restricted Lennox 12L02 Collector Box is a fast track to pressure switch trips and service call backs. This genuine OEM Lennox replacement part, also identified by part number 1242861, is engineered specifically for high efficiency gas furnaces where condensate management is critical. It serves as the primary transition point for combustion byproduct gases, ensuring proper drainage of corrosive moisture