Due to nationwide supply chain issues there may be some products with longer delivery times. Find out more here


Product was successfully added to your basket.

Star Star Star Star Star
Share this product
  • Name
  • Your Email Address
  • Recipient Name
  • Recipient Email Address
  • Message
Successfully added to your basket
Honeywell V4073A 1039 Mid Position Valve 22mm V4073A1039

Honeywell V4073A 1039 Mid Position Valve 22mm V4073A1039

New Merchandise Created with Sketch.
Item Code: 310824
Expected Delivery:  1 - 2 working days
help and info
Need Help?  0800 181 4488
Ex. VAT £112.38 Inc VAT

Additional Information

Brand Honeywell
KW Output No
Lead Time 1 - 2 working days
Valve Type 3 Port Valve
Connection Size 22mm
Unit Type Valve & Actuator
Manufacturer Part No: V4073A1039


Honeywell V4073A Mid Position Valve V4073A1039

The Honeywell V4073A Mid Position 3 Port Valve has been designed to control the flow of water in domestic central heating systems, where both radiator and hot water cylinder circuits are pumped. It is typically suited for small to medium sized installations.

The V4073A mid position valve features a manual lever, which should normally be in the 'AUTO' position. This can, however, be changed to 'MAN OPEN' position for system draining and filling purposes.

The V4073A should be used in conjunction with a room thermostat and cylinder thermostat to provide full temperature control of a conventional, fully pumped central heating installation. When used in this way, the control system is known as Sundial Y Plan and the components can be connected together using the Honeywell Sundial Plan Wiring Centre which has dedicated terminations and there is no need for a wiring diagram. 

An alternative method of wiring is to use the Honeywell 10-way Junction Box (42002116-002) together with the Honeywell Sundial Plans Wiring Booklet.


  • Spring return action
  • Three position operation
  • Powerhead replaceable without draining down
  • Manual lever for filling/draining down
  • Quiet operation, minimal power consumption
  • Provides electrical output to boiler and/or pump
  • 22mm Compression Fittings