This hot tub component is fully compatible with Watkins Spas Hi-Limit Sensor 30210, ensuring precise temperature regulation and enhanced safety. Designed for seamless integration, it helps prevent overheating by accurately monitoring water temperature, protecting your spa’s heating system, and providing reliable performance for a worry-free hot tub experience. Ideal for maintaining optimal spa conditions with expert-level reliability.

Hot Tub Compatible with Watkins Spas Hi-Limit Sensor Fits Hot Spring Classic, 145 degrees, 30210. 

• This is for a Single Item
• This Heater High-Limit (red heater reset button) is the replacement fits Hot Spring Classic (Model D)
• Technical Specs: 
  Copper Lead Length: 30 " 
  Bulb Width: 3/16" 
• In addition, the spa may be filled, but the heater hi-limit can trip because of trapped air within the heater. 
• When the spa is drained and refilled, follow these steps:
• 1. Turn the temperature all the way down
• 2. Energize the spa
• 3. Immediatly turn on the jet pump to purge the air from the heater and circ pump.Let pump run for 10 minutes
• 4. Turn off jet pump and set temperature to your desired setting.

• Notes: The heater hi-limit thermostat sensing bulb is located in the drywell within the heater housing. The hi-limit trips when the temperature inside the heater housing exceeds 145 (plus or minus 10) degrees F. The heater hi-limit can be reset when the temperature inside the heater body has cooled. To reset this high limit, push the red button.