Xylem-McDonnell & Miller 193-7B Combination Low Water Cut Off & Pump Controller

Description

Xylem-McDonnell & Miller 193-7B Combination Low Water Cut Off and Pump Controller

The Xylem-McDonnell & Miller 193-7B is a professional-grade combination low water cut off and pump controller engineered for reliable protection and precise control on steam boiler systems. Designed for demanding commercial and residential steam heating applications, this unit integrates two critical safety and operational functions into a single, compact device — simplifying installation and reducing the number of components required on your boiler.

Product Overview

The 193-7B features a built-in 135-ohm potentiometer switch that enables accurate water level sensing and seamless integration with compatible remote level indicators or control panels. When water drops below the safe operating level, the low water cut off function automatically shuts down the burner to prevent boiler damage, while the pump controller function manages the feed pump to maintain proper water levels during operation.

Key Features

• Combination low water cut off and pump controller in a single unit
• 135-ohm potentiometer switch for remote level indication compatibility
• Rated for steam boilers with a maximum working pressure of 150 PSI
• Protects boiler from low water conditions by cutting off burner operation
• Controls feed pump to automatically maintain proper boiler water level
• Designed for straightforward installation on steam heating systems
• Manufactured by Xylem-McDonnell & Miller, a trusted name in boiler controls

Specifications

• Part Number: 164400
• SKU: 193-7B
• Application: Steam boilers
• Maximum Pressure: 150 PSI
• Potentiometer: 135-ohm
• Function: Low water cut off + pump controller (combination)
• Brand: Xylem-McDonnell & Miller

Why Choose the McDonnell & Miller 193-7B?

McDonnell & Miller has been a cornerstone brand in boiler safety controls for over a century. The 193-7B upholds that legacy by delivering dependable low water protection and pump management in one integrated package. By combining both functions, it reduces installation complexity, minimizes potential leak points, and provides a cost-effective solution for steam boiler safety compliance. Whether you’re servicing an existing system or specifying controls for a new installation, the 193-7B is a reliable choice for HVAC professionals.