Honeywell HomeSKU: HEHOMPVPH

Honeywell Replacement Head (for V4073A Zone Valve)

(40003916-003/U)
Honeywell Replacement Head - V4073A 40003916-003/U
£79.99
Ex.VAT
Up to 7 day delivery

Product features:

  • Directly replaces the actuator on V4073A 3-port mid-position motorised valves
  • Eliminates the time-consuming need to drain down the central heating system
  • Integrated manual override lever allows mechanical opening during commissioning
  • Spring-return motor ensures reliable positioning upon electrical power removal
  • Standard 5-wire format ensures immediate compatibility with existing wiring centres

The Honeywell 40003916-003/U replacement powerhead offers heating engineers an efficient solution for restoring faulty V4073A 3-port mid-position motorised valves. Designed with a 22mm compatibility footprint and weighing 0.62kg, this hardwired actuator eliminates the requirement to completely drain down the central heating circuit during repair. By simply detaching the malfunctioning head from the existing brass body, installers can attach this direct replacement, reducing time spent on site and preventing the introduction of fresh oxygenated water into the system.

The internal mechanism utilises a reliable spring-return motor ensuring rapid and secure valve positioning upon the removal of electrical power. Featuring standard 5-wire installation architecture, it guarantees seamless integration with existing Honeywell wiring centres and programmers. For critical commissioning or sudden power failures, a manual override lever is situated on the casing to mechanically force the port open, enabling unrestricted flow for system filling and bleeding. This low-power consumption actuator operates quietly while delivering robust actuation.

Q: Does fitting this part require the system to be drained?
A: No, the replacement head can be swapped without draining down the pipework.

Q: Which specific brass valve body is this compatible with?
A: It is designed exclusively to fit Honeywell V4073A 3-port motorised valves.

Q: Does the motor feature a mechanical fail-safe mechanism?
A: Yes, it operates on a spring-return mechanism for secure default positioning.

Q: How many wires are required for electrical connection?
A: It utilises a standard 5-wire installation format for heating control integration.