McDonnell & Miller 193-A-1 Replacement Casting

The McDonnell & Miller 193-A-1 Replacement Casting is a primary structural component engineered specifically for the Series 193 low water cut-off and pump controller. As a veteran technician knows, the integrity of the water column casting is vital for maintaining the 150 psi (10.5 kg/cm2) maximum pressure rating required by commercial and industrial steam boilers. This replacement boiler casting features precise 1" NPT connections for the main equalizing lines and 1/2" NPT tappings for gauge glass and tri-cock sets, ensuring accurate visible water level monitoring. Designed to house the interior float and magnetic repulsion mechanism, this high-grade casting provides the necessary reliability for pump control and burner protection. When performing a rebuild on a 193-A series unit, using this genuine HVAC replacement part ensures the unit maintains its original specifications and compatibility with existing steam boiler controls without the risks associated with aftermarket alternatives.

• Engineered for High-Pressure Systems: Rated for applications up to 150 psi, providing robust structural support for low water cut-off operations.
• Precision Threaded Connections: Features standard 1" NPT boiler connections and integral tappings for gauge glass installations.
• Durable Cast Iron Construction: Built to withstand the harsh thermal cycling and corrosive environments typical of industrial steam boiler systems.
• Legacy Compatibility: Designed specifically as a direct fit for 193-A series controllers, ensuring no modifications are needed during installation.

• Does this include the head mechanism or switch? No, this is the replacement casting only; internal mechanisms and electrical switches must be purchased separately or salvaged from the existing unit.
• Will this fit a 93 series controller? While similar, always verify the specific model number (193-A-1) as it is specifically tapped for the 193-A series boiler water level control.
• How do I handle shipping for this item? Due to the weight and cast iron composition, this item is shipped with specific logistical requirements.

This item is not eligible for free shipping.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.