Honeywell 3 Port Mid Position Valve 22mm V4073A1039/U

The Honeywell 3 Port Mid Position Valve 22mm V4073A1039/U controls water flow between central heating and hot water circuits in fully pumped systems. It supports Y-plan layouts, so it helps direct flow to radiators, cylinder, or both when required. Moreover, its spring-return action, manual lever, and replaceable powerhead make servicing easier. Therefore, this valve helps restore reliable temperature control, smoother operation, and efficient daily heating performance.

Important fitting advice

We recommend that all parts are fitted by a fully qualified Gas Safe registered engineer. If you need help confirming the right part, contact us our team has 10+ years of boiler spares knowledge and friendly chat support to help you quickly.

Delivery

At Boiler Spares Hub, we dispatch orders within 1 working day (Monday-Friday). Orders placed outside working days will be dispatched on the next working day. For delivery options available for this product, please add it to your basket or check our delivery options page.

Returns

We accept 30-day returns. Returns must be in an unopened, sealed box. If we find the item has been used or installation was attempted, we may refuse the return.

Frequently Asked Questions (FAQs)

1. What does the Honeywell V4073A1039/U valve do?
It controls water flow between heating and hot water circuits.
As a result, it helps manage radiator and cylinder heating demand.

2. Is this valve suitable for Y-plan systems?
Yes, this 3 port mid-position valve suits many Y-plan heating systems.
It can direct flow to heating, hot water, or both when required.

3. What size connection does this valve use?
This model uses 22mm compression connections.
Therefore, it suits many standard UK domestic heating pipework setups.

4. Can the powerhead be replaced?
Yes, the powerhead can usually be replaced for easier servicing.
However, a qualified heating engineer should always check the system first.

5. Who should install this Honeywell 3 port valve?
A qualified heating engineer should install this part.
Correct fitting and wiring help ensure safe, reliable heating operation.