Potterton
Potterton Elastic Nut 3/4 Inch 5142489
Potterton 3/4 inch elastic nut (5142489) for Potterton Commercial Sirius 2 and Sirius 3 FS50 and FS70 boilers.
£2.40
£2.00 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 elastic nut is a 3/4 inch fastening component supplied under part number 5142489 for Potterton Commercial boiler applications. It is used on the Potterton Commercial Sirius 2 and Sirius 3 range, where it secures joints within the appliance assembly. The elastic nut design holds tension on the threaded connection it is fitted to, resisting loosening under vibration and thermal cycling.
Signs this part needs replacing
- The nut no longer holds tension and the joint it secures works loose
- Visible corrosion, cracking or deformation of the nut body
- Threaded connection weeping or seeping at the joint the nut secures
- The nut has been removed during servicing and the elastic section has lost its grip
Before you order
- Confirm the appliance model is one of the Sirius 2 or Sirius 3 variants listed above
- Check the thread size required on the joint being worked on is 3/4 inch
- Verify the part number 5142489 against the existing component or the appliance documentation
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS50 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS70 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS50 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS70 | — | — | — |
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 technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.