Onyx
Onyx Central Heating Cleaner ONYXCLEAN
Onyx Central Heating Cleaner in a 500ml bottle for cleaning the inside of a central heating system.
£5.86
£4.88 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
Onyx Central Heating Cleaner is a 500ml bottle of chemical treatment for central heating systems, supplied within the Onyx product range. It is introduced into the heating circuit to clean internal surfaces of radiators, pipework and the boiler. It is used as part of a system flush or routine maintenance regime.
Signs this part needs replacing
- Radiators warm up slowly or have cold spots at the bottom
- Boiler noise or kettling during operation
- Sludge or black deposits found in the system water or on a magnetic filter
- Uneven heat across the property despite the system running
Before you order
- Confirm the bottle size is sufficient for the system being treated
- Check whether a separate inhibitor is required after cleaning
- Check the appliance manufacturer's guidance on chemical treatment of the system
- Verify the product is suitable for the materials in the heating circuit
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| SPECIAL OFFERS Onyx | — | — | — |
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.