Caleffi HIU
Caleffi HIU DPCV Kit For SATK20 (Behind PCB) 789120
Caleffi HIU DPCV kit, part 789120, for the SATK20 heat interface unit, mounted behind the PCB.
At a glance
- Also known as 4260114
£642.23
£535.19 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 Caleffi HIU 789120 is a differential pressure control valve (DPCV) kit intended for the SATK20 heat interface unit. It mounts behind the printed circuit board (PCB) within the unit. The DPCV regulates differential pressure across the circuit, helping the HIU maintain stable operating conditions.
Signs this part needs replacing
- Differential pressure across the HIU circuit cannot be held at its set value
- Domestic hot water temperature fluctuates or drifts under draw-off
- Audible noise or vibration from the valve area during operation
- Heating or DHW performance becomes erratic as flow conditions change
- Visible damage, leakage or contamination around the valve body
Before you order
- Confirm the appliance is a Caleffi HIU SATK20 unit
- Check the existing valve position and that access behind the PCB is available
- Verify the part number 789120 against the manufacturer's parts list for your unit
- Confirm whether the PCB must be removed to gain access before starting work
Compliance
| Alternative numbers | 4260114 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| CALEFFI HIU 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.
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