meaning it opens the circuit (Cut-Out) at 185°F and automatically closes (Cut-In) at 155°F after the plenum cools

12-inch board mount extension allows the sensor to be positioned accurately within the plenum for the most representative temperature reading

The ODF solder connections are solid copper for superior brazeability in the field

Environmental Resilience: The splashproof design and stainless steel bulb prevent corrosion in condensing and high-humidity environments

Weil McLain 635-100-003 Air Vent Els PW 17895 meaning it opens the circuitThe Weil McLain 635 100 003 Automatic Air Vent is a critical component for maintaining hydronic system efficiency by ensuring the continuous removal of trapped air. Designed for high performance residential and commercial boilers, this #400 series air vent features a 1 2" NPT connection and is engineered to handle demanding operating conditions. With a maximum pressure rating of 150 PSI and a maximum temperature threshold of 240F, this brass automatic