White-Rodgers™ F89-0211 Immersion Well and Packing Nut, 1/ in NPT, Standard Shank, For use with 11DXX/L4000/L6000 Series Hydronic Temperature Controls

Item Features

• The bulb of the control can be removed from an immersion well in the tank wall without draining the boiler tank
• The packing nut can be used with any of the remote bulb types listed
• Packing nuts permit closer control than wells because the bulb is directly immersed in the liquid
• Wells are used where it is desired that the control operates from the temperature of a liquid in a closed system
• F55 Packing Nut, 1/2 in NPT, Standard Shank Style, 3-1/2 in x 3/8 in Bulb Size
• For use with all hydronic controls with 3-1/2 in x 3/8 in bulb size