Biasi
Biasi By-Pass Pipe BI1371103
Biasi BI1371103 by-pass pipe for Activ, Advance, Inovia and RIVA gas boilers.
At a glance
- Also known as 1651247
Showing prices
£32.93
£27.44 ex. VAT · VAT at 20%
Available to order · 3 working days
Available to order · 3 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Biasi BI1371103 is a by-pass pipe used in the hydraulic circuit of Biasi gas boilers. It forms part of the pipe assembly and maintains correct flow through the heating circuit by allowing water to circulate when system demand is low. It is listed by the manufacturer for the Activ, Advance, Inovia and RIVA ranges.
Signs this part needs replacing
- Water weeping or staining around the by-pass pipe connections
- Visible corrosion, pitting or scale build-up on the pipe
- Boiler locking out or cycling when few heating outlets are open
- Noise or vibration from the hydraulic circuit during low-demand running
- Evidence of a previous repair or disturbed joint at the by-pass
Before you order
- Confirm your boiler model and gas type against the fitment list above
- Check the GC number on the appliance data badge against your model variant
- Inspect the existing pipe and connections to confirm the fault is with the by-pass pipe itself
- Verify the part number BI1371103 matches the item you need
Compliance
| Barcode / EAN | 8023585846674 |
|---|---|
| Alternative numbers | 1651247 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BIASI ACTIV A 18S | — | — | — | |
| BIASI ACTIV A 18S | 41-583-11 | 41-583-11 | — | — |
| BIASI ACTIV A 18S LPG | 41-583-11 | 41-583-11 | — | — |
| BIASI ACTIV A 25S | 41-583-12 | 41-583-12 | — | — |
| BIASI ACTIV A 25S | — | — | — | |
| BIASI ACTIV A 25S LPG | 41-583-12 | 41-583-12 | — | — |
| BIASI ACTIV A 30S | — | — | — | |
| BIASI ACTIV A 30S | 41-583-13 | 41-583-13 | — | — |
| BIASI ACTIV A 30S LPG | 41-583-13 | 41-583-13 | — | — |
| BIASI ACTIV A PLUS 16S | 41-583-20 | 41-583-20 | — | — |
Showing 10 of 57 compatible appliances.
Fitment listings are a guide, not a guarantee. Plant-room assemblies get modified on site more often than not. Send us the GC number off the data badge and a photo of the existing valve and we will confirm before anything is dispatched.
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.
manual
BIASI appliance manual — ACTIV A 18S (GC 41-583-11), ACTIV A 18S LPG (GC 41-583-11), ACTIV A 25S (GC 41-583-12), ACTIV A 25S LPG (GC 41-583-12), ACTIV A 30S (GC 41-583-13), ACTIV A 30S LPG (GC 41-583-13)
manualmanualBIASI appliance manual — ACTIV A PLUS 16S (GC 41-583-20), ACTIV A PLUS 16S LPG (GC 41-583-20), ACTIV A PLUS 25S (GC 41-583-21), ACTIV A PLUS 25S LPG (GC 41-583-21)
manualmanualBIASI appliance manual — ADVANCE 25S (GC 41-583-33), ADVANCE 25S LPG (GC 41-583-33), ADVANCE 30S (GC 41-583-34), ADVANCE 30S LPG (GC 41-583-34)
manualmanualBIASI appliance manual — ADVANCE PLUS 16S (GC 41-583-22), ADVANCE PLUS 16S LPG (GC 41-583-22), ADVANCE PLUS 25S (GC 41-583-23), ADVANCE PLUS 25S LPG (GC 41-583-23), ADVANCE PLUS 30S (GC 41-583-24), ADVANCE PLUS 30S LPG (GC 41-583-24)
manualmanualBIASI appliance manual — ADVANCE PLUS 16S ERP (GC 41-583-27), ADVANCE PLUS 16S ERP LPG (GC 41-583-27), ADVANCE PLUS 25S ERP (GC 41-583-28), ADVANCE PLUS 25S ERP LPG (GC 41-583-28), ADVANCE PLUS 30S ERP (GC 41-583-29), ADVANCE PLUS 30S ERP LPG (GC 41-583-29)
manualmanualBIASI appliance manual — INOVIA 16S (GC 41-583-25), INOVIA 16S LPG (GC 41-583-25), INOVIA 25S (GC 41-583-26), INOVIA 25S LPG (GC 41-583-26)
manualmanualBIASI appliance manual — INOVIA 25S ERP (GC 41-583-30), INOVIA 25S ERP LPG (GC 41-583-30)
manualmanualBIASI appliance manual — RIVA ADVANCE HE M110B.24SR/C (GC 41-583-07)
manualmanualBIASI appliance manual — RIVA COMPACT HE M96A.24SR/C (GC 41-583-09), RIVA COMPACT HE M96A.28SR/C (GC 41-583-10)
manualmanualBIASI appliance manual — RIVA PLUS HE 24S ERP (GC 41-583-31), RIVA PLUS HE 24S ERP LPG (GC 41-583-31), RIVA PLUS HE 28S ERP (GC 41-583-32), RIVA PLUS HE 28S ERP LPG (GC 41-583-32)
manualmanualBIASI appliance manual — RIVA PLUS HE M296.24SR/C (GC 41-583-18), RIVA PLUS HE M296.24SR/C LPG (GC 41-583-18), RIVA PLUS HE M296.28SR/C (GC 41-583-19), RIVA PLUS HE M296.28SR/C LPG (GC 41-583-19)
manualNo technical questions yet for this part.
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