Hi LimitsSingle pole rated at 25 amps with temperature rating set at 121°F. Best results are obtained when the bulb is installed in a dry well or groove tube at or immediately before the heater12" capillary length, 5/16" bulb thicknessThis is a safety device! If it is found to be out of calibration, do not attempt to perform a field adjustment! Replace bad hi limit with a new one
Our pool and spa are over 25 yrs old. When the spa air button stopped working, we found that it was no longer avaliable. We did some online searching and found that this was a good replacement option and found it on the PST Pool Supplies website. We ordered it and once it arrived, we were very happy that we were able to install it and it worked fine.