Petersen MFG Waterer Fenwal Thermostat 100-1130

The Petersen MFG Replacement thermostat will regulate the temperature of your Petersen waterer heaters.

The thermostat comes factory preset at 40 degrees. The temperature can be adjusted by turning the setscrew counter-clockwise to turn the temperature up and clockwise to turn the temperature down.

This Thermostat works well for customers that want the entire bowl ice-free, although it will use more electricity when set higher than the Factory setting. 

FAQ: Will this thermostat work on the older Franklin automatic waterers that had the FRU thermostat?

YES:  This thermostat is often used in place of the discontinued FRU thermostat.  The threads are the same and it will wire to your new or existing heaters.