1" Sweat Zone Valve, 18" Leads

Honeywell V8043E1020 Zone Valve – 1" Sweat, Two-Way On/Off Low Voltage Actuator

The Honeywell V8043E1020 is a two-way, straight-through zone valve with low voltage on/off control, intended for use in hydronic heating systems. With a compact form factor and 1" sweat connections, this valve is suitable for residential and light commercial zoning applications where individual zone isolation is required.

Design and Application

• Valve Function: Normally closed, opens fully with 24V power and returns to closed position on power loss
• Powerhead: Replaceable without breaking into the system or draining lines
• End Switch: Integral end switch rated for 50 VA @ 24V AC for controlling secondary equipment (e.g., circulator or burner)
• System Use: Suitable for closed-loop hydronic heating systems

Key Features

• Manual Lever: Allows manual override for system filling or emergency operation
• Straight-Through Flow Pattern: Designed for efficient water flow with minimal pressure drop
• 18" Lead Wires: Pre-stripped conductors for quick electrical connections
• Powerhead Replacement: Field-serviceable without disconnecting piping or draining the system
• Fast Actuation: Typical full stroke operation time of 15 seconds

Technical Specifications

• Model Number: V8043E1020/U
• Pipe Size: 1" sweat connection
• Voltage: 24 VAC, 50/60 Hz
• Max Fluid Temp: 240°F (116°C)
• Max Close-Off Pressure: 20 PSI
• Operating Ambient Temp: 125°F (52°C) maximum
• Control Compatibility: Works with standard 24V thermostats and zone control panels

Installation Guidelines

This valve should be installed in the return line of a closed-loop hydronic system. It is designed for horizontal mounting but may be mounted vertically if precautions are taken to protect the actuator from condensate and dripping. Electrical connection requires a low-voltage transformer and thermostat. Follow NEC and local codes.

Notes for Contractors

• Field-serviceable actuator minimizes labor time for replacements
• Includes end switch for burner or pump control integration
• Reliable motor-driven mechanism with spring return ensures consistent operation
• Common choice for zoning applications using standard Honeywell controls and thermostats

Performance Summary

• Actuation: Motor open, spring close
• Control Signal: 24V AC from low-voltage thermostat or relay
• Cycle Rate: 15 seconds nominal
• End Switch Function: Closes circuit when valve is fully open