Description
Xylem-McDonnell & Miller 176318 Zone Valve Body Overview
The Xylem-McDonnell & Miller 176318 is a 3/8″ sweat (soldered) connection, normally closed (N/C) zone valve body featuring a manual lift stem, designed for reliable flow control in residential and light commercial hydronic heating systems. McDonnell & Miller’s long-standing reputation for quality hydronic components makes this valve body a trusted choice for contractors and engineers who demand dependable performance.
Key Features
- 3/8″ sweat (soldered) connection for secure, leak-free installation
- Normally closed (N/C) design — valve closes automatically when de-energized, conserving energy and preventing unintended flow
- Manual lift stem allows the valve to be opened manually without electrical power, ideal for system startup, testing, and maintenance
- Robust valve body construction built to withstand the demands of hydronic heating applications
- Compatible with standard McDonnell & Miller actuator heads for flexible system configuration
- Compact design suitable for tight mechanical spaces
Typical Applications
- Hydronic zone heating systems
- Radiant floor heating distribution
- Baseboard and fan-coil hydronic circuits
- Boiler zone control and balancing
Why Choose McDonnell & Miller by Xylem?
McDonnell & Miller, a brand under the Xylem family, has been a cornerstone of the hydronic heating industry for over a century. Their zone valve bodies are engineered for long service life, easy installation, and compatibility with a wide range of actuator options — giving HVAC professionals the confidence to specify them on any job.
