White-Rodgers F89-0036 Well this is the pad frame

this is the pad frame only

for streamlined inventory management

this fire alarm annunciator mounts securely to a standard single-gang electrical box

and Marley 410169001 heating units

Which furnace brands use this

White-Rodgers F89-0036 Well this is the pad frameThe White Rodgers F89 0036 is a professional grade 1 2" NPT immersion well designed for heavy duty hydronic heating systems and boiler applications. Engineered for precision and longevity, this copper thermowell features a standard shank with a 3 1 2" insertion length, specifically sized to accommodate a 7 16" temperature sensing bulb. This design allows contractors to service or replace control bulbs without the need to drain the entire system,