this is a pilot-operated valve

draw excessive amps

Ensuring reliable switching in industrial and commercial HVAC systems

What was the reason for the 950931F part number change

an oversized gas orifice

Weil McLain 635-100-022 Valve R-410A this is a pilot-operated valveThe Weil McLain 635 100 022 3 way valve body is a professional grade replacement engineered specifically for the Weil McLain CGt Series 1 and 2 residential gas boilers. Designed to replace the VCZMS6100 U, this brass 3 port valve body is critical for maintaining precise boiler water flow control and ensuring thermal balance within hydronic heating systems. As a direct fit HVAC replacement part, it integrates seamlessly with your existing Weil McLain