1" Sweat Zone Valve, Terminal Block

Honeywell V8043F1051 Zone Valve – 1" Sweat, 24V Two-Way On/Off with End Switch

The Honeywell V8043F1051 is a two-position, motorized zone valve designed for use in hydronic heating systems. This low-voltage model includes an end switch and features 1" sweat connections for direct integration into copper pipe systems. It is commonly used for zoning hot water baseboard or radiant heating applications.

Product Overview

• Valve Type: Two-way, normally closed when de-energized
• End Switch: Integral switch provides control signal to circulators or burners when valve is fully open
• Manual Opener: Built-in lever allows manual valve actuation during power outages or system filling
• Powerhead: Removable actuator for service without draining the system or cutting lines
• Actuation Time: Motor-driven open in approximately 15 seconds; spring-return close

Key Features

• Connection Type: 1" sweat (copper)
• Flow Coefficient: Cv rating of 3.5 for hot water applications
• Voltage: 24 VAC, 50/60 Hz low voltage operation
• Electrical Termination: Terminal block for secure, low-voltage wiring
• Serviceable Powerhead: Replaceable without opening the piping circuit

Technical Specifications

• Model: V8043F1051/U
• Maximum Fluid Temperature: 200°F (93°C)
• Maximum Close-Off Pressure: 20 PSI
• Ambient Operating Temperature: Up to 125°F (52°C)
• End Switch Rating: 50 VA pilot duty @ 24V AC

Installation Considerations

The V8043F1051 should be mounted with the actuator in a horizontal position to avoid exposure to condensate. It is intended for use in closed-loop hydronic systems and should be installed in accordance with applicable codes. Ensure compatibility with thermostat and control equipment prior to wiring.

Application Notes for Contractors

• Includes end switch for integration with system controls such as relays or aquastats
• Suitable for zoning hot water heating loops in multi-zone residential systems
• Manual lever aids in system purging or testing without power
• Quick-change actuator reduces service time during field replacement

System Compatibility

• Designed for use with standard 24V thermostats and multi-zone relay panels
• Appropriate for use with circulator- or zone-valve-based hydronic heating systems
• Supports systems with up to 20 PSI close-off requirements