3/4" Sweat Zone Valve, 18" Leads

Honeywell V8043E1012/U Zone Valve – Two-Way Low Voltage Control for Hydronic Systems

The Honeywell V8043E1012/U is a two-way on/off zone valve designed for hydronic heating systems requiring precise control of water flow. Operating on 24 VAC, this low voltage valve provides dependable isolation of individual zones in hot water heating applications. The motorized actuator controls the valve position based on external thermostat signals.

System and Application Use

• Valve Type: Two-way, normally closed, spring return
• Control Signal: Operates on 24 VAC from a low-voltage thermostat or controller
• Operation: Opens fully in response to thermostat demand; spring returns to closed position when power is removed
• End Switch: Integral end switch rated for 50 VA at 24 VAC for control of circulator or boiler
• Connection: 1/2" sweat connections for copper tubing

Key Features

• Motor-Driven Actuation: Provides positive valve positioning with spring return fail-safe
• Replaceable Powerhead: Allows servicing without draining the system
• Built-In End Switch: Enables coordinated control with system pump or burner
• Application: Suitable for zoning in closed-loop hot water systems
• Rated Voltage: 24 VAC, 60 Hz

Technical Specifications

• Model Number: V8043E1012/U
• Line Size: 1/2 in. sweat connection
• Voltage: 24 VAC, 60 Hz
• Max Ambient Temp: 125°F (52°C)
• Max Fluid Temp: 240°F (116°C)
• Max Static Pressure: 20 psi differential

Installation Considerations

This valve is intended for installation in closed-loop hydronic systems. For optimal performance and safety, it should be installed by qualified HVAC professionals familiar with zoning controls. Orientation must allow proper drainage from the actuator housing, and electrical connections should comply with NEC requirements.

Contractor Notes

• End switch wiring simplifies interlock with system components
• Actuator and valve body designed for service separation—no need to drain system for head replacement
• Compatible with Honeywell and other 24V thermostatic zone control systems
• Low power draw suitable for multi-zone panel integration

Performance Summary

• Actuator Type: Motorized with spring return
• Position Feedback: End switch closes when valve is fully open
• Wiring Terminals: 18" pre-stripped leads
• Mounting: Horizontal preferred; vertical acceptable if moisture is controlled