Caleffi HIU
Caleffi HIU Water Hammer Arrester 525131
Water hammer arrester, part 525131, for the SATK32 unit in the Caleffi HIU range.
At a glance
- Also known as 4260112
£105.40
£87.83 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
A water hammer arrester manufactured for the Caleffi HIU range, part number 525131. It is specified for the SATK32 unit, where it absorbs the pressure surge created when flow stops suddenly. Its role is to damp the shock wave in the pipework rather than let it travel back through the appliance.
Signs this part needs replacing
- A loud bang or knock from the pipework when a valve or tap closes
- Repeated knocking or vibration in the pipework during or after draw-off
- Pressure surges or noise traced to the SATK32 installation
- Visible damage, corrosion or leakage at the arrester body or its connection
Before you order
- Confirm the appliance is a SATK32
- Check the existing part number against 525131
- Inspect the mounting point and connection for damage before fitting
Compliance
| Alternative numbers | 4260112 |
|---|
| 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.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Tell the parts assistant what it's going into — the appliance make and model, or the GC number off the data badge — and it will check this part is on the fit list.