SPECIAL OFFERS
Sentinel X400 System Restorer 1 Litre
Sentinel X400 System Restorer in a 1 litre pack, a liquid treatment for use in heating systems.
£15.26
£12.72 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
Sentinel X400 System Restorer is a liquid treatment supplied in a 1 litre pack for use in heating systems. It is manufactured by Sentinel and is intended to restore system condition as part of routine heating system maintenance.
Signs this part needs replacing
- Radiators heating unevenly, with cold spots at the bottom or across the panel
- Boiler noise such as kettling, banging or gurgling during operation
- Sluggish circulation and long warm-up times across the system
- Discoloured or dirty system water when bleeding radiators or draining down
- Repeated pump or valve problems linked to system contamination
Before you order
- Confirm the system volume so the correct quantity of treatment can be calculated
- Check the system water condition and whether a separate inhibitor is required afterwards
- Verify the part number X400 against the manufacturer's documentation for your system
- Check that the treatment is suitable for the materials and components fitted to the system
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SPECIAL OFFERS Sentinel | — | — | — |
Documents & drawings
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No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
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