this stainless steel power element restores factory-spec modulation without requiring a full valve body replacement

Always verify your service manual's part list

Built to a standard 48-frame design

By swapping the factory natural gas plate with this Weil McLain boiler part

Siemens Industrial Controls 52BAK Contactor Block 318973-401 this stainless steel power elementThe Siemens Industrial Controls 52BAK is a precision engineered normally open (N O) contactor block designed for field level integration within professional motor control centers and automation panels. As a vital component for Siemens auxiliary contact expansion, this block allows technicians to implement critical interlocking, status signaling, and control logic modification without replacing the entire Siemens contactor assembly. Built for high duty