Potterton
Potterton Paddle/By-Pass Assembly 10.0307
Potterton paddle/by-pass assembly, part 10.0307, for Potterton Commercial Sirius SAT boiler models.
£39.60
£33.00 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 Potterton paddle/by-pass assembly, part number 10.0307, is a hydraulic component used in Potterton Commercial Sirius SAT boilers. The paddle senses flow through the heat exchanger circuit and the by-pass section maintains a minimum flow path, protecting the appliance from excessive temperature rise under low-flow conditions. It is supplied under Potterton part 5138694 for commercial boiler servicing and repair.
Signs this part needs replacing
- The boiler short-cycles or locks out when heating demand is low or when zone valves close down.
- Flow and return differential cannot be maintained, with the appliance running hotter than expected.
- Noisy operation around the heat exchanger or hydraulic section, such as kettling or knocking.
- The paddle no longer moves freely, or the by-pass passage is blocked or stuck.
- Repeated overheat trips during reduced-flow conditions.
Before you order
- Confirm the boiler model is one of the Potterton Commercial Sirius SAT variants listed above.
- Check the part number on the existing assembly against 10.0307 before ordering.
- Inspect the hydraulic housing and sealing faces for damage while the assembly is removed.
- Verify water quality and system treatment to prevent premature failure of the new assembly.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| POTTERTON COMMERCIAL POTTERTON COMMERCIAL SPARES | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT R/1 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT R2Z | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RA | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RA2Z | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RP/1 | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RS | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RS2Z | — | — | — | |
| POTTERTON COMMERCIAL SIRIUS SAT RSP | — | — | — |
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.
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