White-Rodgers™ F89 Immersion Well, Universally Interchangeable, 1/2 Inch NPT Well Spud
- Standard shank
- Used with 11B18, 11B05, 11B55, 1131 hydronic controls
- Wells are used where it is desired that the control operates from the temperature of a liquid in a closed system
- The bulb of the control can be removed from an immersion well in the tank wall without draining the boiler tank
- Packing nuts permit closer control than wells because the bulb is directly immersed in the liquid
- 3-1/2 x 7/16” Inch bulb
Application: Hydronic Element Insertion
