This switch is what senses the ball float position inside the boiler through a magnet, and turns on when the water level drops, activating the water fill solenoid. 0.4A 250V - contact NO (Normally Open). The switch head measures 65 x 20 x 9 mm, with a wire lead length of 500 mm.
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.