White-Rodgers™ F89 Immersion Well, Universally Interchangeable, 1/2 Inch NPT Well Spud
- Standard shank
- 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
- Used with all hydronic controls with bulb size 3-1/2 x 3/8” Inch
- 1-13/16 Inch shank size
Application: Hydronic Element Insertion
