Potterton
Potterton Commercial Duo Tube Exch Fitting 28mm 5142371
28mm duo tube exchanger fitting for Potterton Commercial Sirius 2 and Sirius 3 boilers.
£37.20
£31.00 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 duo tube exchanger fitting is a 28mm connection component used on the heat exchanger of Potterton Commercial Sirius 2 and Sirius 3 boilers. It is supplied under part number FS110 (5142371) and forms part of the tube assembly where the exchanger couples to the boiler's water circuit. Its role is to provide a secure, sealed joint at the specified pipe diameter.
Signs this part needs replacing
- Visible weeping or dripping at the fitting joint during operation
- Corrosion, pitting or scale build-up on the fitting body
- A joint that will not seal after tightening, indicating deformation or thread damage
- Discolouration or staining around the fitting that points to a slow leak
Before you order
- Confirm the boiler model from the appliance data plate against the fit list above
- Check the fitting diameter required is 28mm
- Inspect the surrounding tubework for damage before refitting, as a faulty joint can affect adjacent components
- Verify the existing part number FS110 or 5142371 on the removed component where legible
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS110 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 2 FS90 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS 3 FS110 | — | — | — |
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.