This is an automatic (Auto) limit switch that will reset itself once the temperature drops below its specific differential set point

This is an auto-reset pressure control

you should have continuity

Facilitates a reliable transition from 1/2" inverted flare to 1/2" copper sweat without additional bushings

Weil McLain 511-330-089 Sensor & Clamp This is an automatic (Auto)The Weil McLain 511 330 089 Sensor & Clamp is a critical OEM replacement water temperature sensor engineered for precise thermal monitoring in high efficiency hydronic systems. This thermistor style temperature sensor is primarily utilized as a water return sensor or inlet sensor for Weil McLain GV series boilers, including the GV90, GV90+, and GV 3 Trim models. By delivering accurate resistance based signals to the Integrated Boiler Control (IBC),