Honeywell
Honeywell Conversion Repair Kit V4043H Zone Valve 40003918-006/U
Conversion and repair kit with replacement plate and ball for Honeywell V4043H zone valves, part 40003918-006/U.
At a glance
- Part type: Motorised valves and spares
- Also known as 4200025
£28.80
£24.00 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Honeywell 40003918-006/U is a conversion and repair kit for V4043H zone valves, supplied as a replacement plate and ball for the valve body. It is used to restore correct operation of a motorised zone valve when the internal sealing components wear, distort or become damaged. The kit sits within Honeywell's motorised valve and spares range for domestic heating controls.
Signs this part needs replacing
- The zone valve motor runs but the valve does not open or close fully, leaving the zone permanently cold or permanently hot.
- The manual lever moves with little or no resistance, indicating the valve mechanism is no longer engaging.
- Water passes through the valve when the zone should be shut off.
- Weeping or a persistent drip around the valve body or spindle area.
- A heating or hot water zone fails to respond to the room thermostat or cylinder thermostat.
Before you order
- Confirm the valve body is a V4043H unit before ordering.
- Check the part number marked on the existing valve head or body against 40003918-006/U.
- Note the alternative numbers 4200025 and 40003918, which may appear on older stock or documentation.
- If the valve body itself is corroded or the spindle is worn, assess whether the complete valve is a better repair.
Mechanical
| Part type | Motorised valves and spares |
|---|
Compliance
| Manufacturer part number (MPN) | 40003918-006/U |
|---|---|
| Commodity code | 8481 90 00 00 |
| GPC classification | Valves/Fittings Accessories/Replacement Parts - Water and Gas |
| Alternative numbers | 40003918-006, 4200025 |
| Previous numbers | 40003918-006 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| HONEYWELL RESIDENTIAL PRODUCTS | — | — | — |
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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