Honeywell V8043E1012 3/4″ Sweat Zone Valve
$118.43
The Honeywell V8043E1012 3/4″ Sweat Zone Valve is a rugged, low-voltage hydronic control designed to regulate hot water flow to individual heating zones. Featuring a motorized actuator with spring-return and built-in manual opener, this valve ensures dependable full-open/closed control based on thermostat demand. Its compact brass body and sweat connections make it easy to install in tight field spaces, and the integrated end switch lets the system start circulators or burners only when the valve reaches full travel—preventing short cycling and call-for-heat issues.
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Key Features
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Two-position motorized control for precise on/off water flow in closed-loop hydronic systems
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Normally Closed (NC) configuration — stays closed without power and opens on demand
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Manual opener lever allows valve operation during power failure and returns to auto once power restores
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Replaceable actuator/powerhead — serviceable without removing valve body or draining system
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Built-in end switch for boiler/circulator interlock and reliable zone control sequencing
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Compact brass construction holds up in typical hydronic heating environments
Technical Specifications
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Model / Part: V8043E1012 (also sold as V8043E1012/U)
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Nominal Size: 3/4″ sweat connections (copper tube)
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Valve Type: Two-way, straight-through, Normally Closed (NC)
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Control Voltage: 24 VAC, 50/60 Hz
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Flow Coefficient (Cv): ~3.5
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Operating Fluid Temp: ~50 °F to 200 °F (10 – 93 °C)
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Ambient Temp Rating: ~125 °F max
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Static Pressure Rating: Up to ~300 psi
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Differential Pressure (Close-off): ~20 psi
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Power Consumption: ~7.2–7.7 VA at 24 VAC
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Leads: ~18″ wire leads for thermostat/control connections
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Manual Opener: Yes (spring return when power restores)
