HydroQuip ECO-1 High Limit Sensor WH3, MSPA, TSPA, 6100, 7100, 710 series and EasyPak EP1500 control systems.
Product notes: 76" cable. Bulb - 1/4"D x 1-1/2"L. 3-wire, 4-pin connector.
Service was fast and delivered within a week. Works great! I would use this company again. #sweepstakes
I have an older spa and finding replacement parts is not easy. Spa Depot took my info and found the correct part I needed.