always verify with your model and serial number before installation

Can this orange/black spring be used in the 243-8 model

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

Why is my blower fan running constantly but the furnace isn't heating

Weil McLain 635-100-003 Air Vent Els PW 17895 always verify with your modelThe 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