Honeywell 3 Port Motorised Mid Position Zone Valve 22 mm | V4073A1039/U

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Honeywell V4073A1039 22mm 3-Port Motorised Mid-Position Zone Valve

The Honeywell V4073A1039 is the industry-standard 22mm 3-port mid-position valve used across thousands of domestic heating systems. Designed for Y-plan installations, it diverts water between heating, hot water, or both simultaneously. With a robust brass body, smooth motorised action, and a reliable spring-return mechanism, it has long been the benchmark for dependable heating control.

Key Features

  • 3-port mid-position design (Y-plan) – directs flow to heating, hot water, or both.
  • 22mm compression connections – suitable for standard domestic pipework.
  • Spring-return mechanism – ensures safe fail-closed operation.
  • Auxiliary end-switch for boiler or pump control.
  • Quiet synchronous motor offering smooth and dependable movement.
  • Replaceable powerhead – actuator can be swapped without draining the system.
  • 1m prewired 5-core cable for simple installation.

Typical Applications

  • Domestic central heating using Y-Plan control systems
  • Systems requiring diverter control between heating & hot water
  • Hot water cylinder priority setups
  • Retrofit or replacement of older Honeywell 3-port valves

Technical Specifications

Specification Value
Valve Size 22mm compression
Voltage 230–240V AC, 50Hz
Power Consumption 6W
Operation Motor open / spring return
Port Configuration A – Heating, B – Hot Water, AB – Common
Auxiliary Switch SPDT end-switch
Max Static Pressure 8.6 bar
Max Differential Pressure 0.55 bar (close-off)
Temperature Range 5°C – 88°C
Cable 1m 5-core flying lead
Warranty Standard Honeywell Guarantee

The V4073A1039 is widely regarded as the most reliable 3-port mid-position valve available, offering long service life, easy replacement, and full compatibility with almost all traditional Y-plan heating systems.

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