042 burner orifice ensures your unit operates at the manufacturer’s specified thermal capacity

maintaining the correct water column is critical for downstream equipment performance and system stability

Efficient Retrofitting: Allows for quick sensor replacement without draining the system or replacing the entire well

Is this switch compatible with 24V or 120V systems

while the side ports are standard 1/4" SAE flare

Berko 4520-2048-000 Limit Switch 042 burner orifice ensures yourThe Berko 4520 2048 000 is an OEM 135F CO Auto Limit Switch designed for high performance thermal regulation in Marley Engineered Products and QMark 900 Series B heating systems. This 2 pole limit switch operates with an automatic reset mechanism, functioning as a critical safety component that opens on temperature rise to prevent overheating. Engineered for HVACR technical specifications, it features a single pole single throw (SPST) switch action,