Armstrong International A21191 Electrode Set R-410A This OEM Copeland adapter facilitates

This OEM Copeland adapter facilitates a secure transition from a 1-3/8" ID stub tube to a 1-3/4"-12 male Rotalock fitting

Designed for hot water

It should only be used in systems designed for Hi-Lo fan speed control to avoid wiring complications or improper motor sequencing

OEM Compatibility: Exact drop-in replacement for Reznor 220554

Built to handle a 500 PSI maximum working pressure

Armstrong International A21191 Electrode Set R-410A This OEM Copeland adapter facilitatesThe Armstrong International A21191 Electrode Set is a critical OEM replacement part designed for high precision water level monitoring in industrial and commercial humidification systems. This authentic water level electrode set of 3 is specifically engineered for compatibility with the Armstrong HumidiClean HC Series (including models HC 4100, 4145, 4300, and 4500) and GFH Series humidifiers. By utilizing advanced conductivity sensing technology,