Biasi
Biasi 1/2 Inch Square Domestic Water Cock BI1084101
Biasi 1/2 inch square domestic water cock, an isolation valve for the domestic hot water circuit on Biasi gas boilers.
At a glance
- Also known as 12-SQUARE-DOMESTIC-WATER-COCK, 1650201
Showing prices
£36.29
£30.24 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 1/2 inch square domestic water cock is an isolation valve used on the domestic hot water circuit of Biasi gas boilers. It allows the DHW supply to be shut off at the appliance for servicing, maintenance or component replacement. The valve is operated with a square key or spanner on the 1/2 inch head.
Signs this part needs replacing
- Water weeping or dripping from the valve body or spindle
- The square head is rounded, seized or will not turn
- The valve will not shut off the DHW supply fully when closed
- Scale or corrosion visible around the valve seat or union
- Water staining or dampness beneath the valve after servicing
Before you order
- Confirm the appliance model against the fit list above
- Check the valve size and connection on the boiler before ordering
- Inspect the surrounding pipework and unions for damage while the system is drained
- Confirm whether any washers or seals are required for the joint on your appliance
Compliance
| GC number | E83-137 |
|---|---|
| Barcode / EAN | 8023585806579 |
| Alternative numbers | 12-SQUARE-DOMESTIC-WATER-COCK, 1650201 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| BIASI ACTIV A 25C | — | — | — | |
| BIASI ACTIV A 25C | 47-583-21 | 47-583-21 | — | — |
| BIASI ACTIV A 25C LPG | 47-583-21 | 47-583-21 | — | — |
| BIASI ACTIV A 30C | — | — | — | |
| BIASI ACTIV A 30C | 47-583-22 | 47-583-22 | — | — |
| BIASI ACTIV A 30C LPG | 47-583-22 | 47-583-22 | — | — |
| BIASI ACTIV A 35C | 47-583-23 | 47-583-23 | — | — |
| BIASI ACTIV A 35C | — | — | — | |
| BIASI ACTIV A 35C LPG | 47-583-23 | 47-583-23 | — | — |
| BIASI ACTIV A PLUS 25C | 47-583-28 | 47-583-28 | — | — |
Showing 10 of 134 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 25C (GC 47-583-21), ACTIV A 25C LPG (GC 47-583-21), ACTIV A 30C (GC 47-583-22), ACTIV A 30C LPG (GC 47-583-22), ACTIV A 35C (GC 47-583-23), ACTIV A 35C LPG (GC 47-583-23)
manualmanualBIASI appliance manual — ACTIV A PLUS 25C (GC 47-583-28), ACTIV A PLUS 25C LPG (GC 47-583-28), ACTIV A PLUS 30C (GC 47-583-26), ACTIV A PLUS 30C LPG (GC 47-583-26), ACTIV A PLUS 35C (GC 47-583-27), ACTIV A PLUS 35C LPG (GC 47-583-27)
manualmanualBIASI appliance manual — ADVANCE 25C (GC 47-583-43), ADVANCE 25C LPG (GC 47-583-43), ADVANCE 30C (GC 47-583-44), ADVANCE 30C LPG (GC 47-583-44), ADVANCE 35C (GC 47-583-45), ADVANCE 35C LPG (GC 47-583-45)
manualmanualBIASI appliance manual — ADVANCE PLUS 25C (GC 47-583-29), ADVANCE PLUS 25C LPG (GC 47-583-29), ADVANCE PLUS 30C (GC 47-583-30), ADVANCE PLUS 30C LPG (GC 47-583-30), ADVANCE PLUS 35C (GC 47-583-31), ADVANCE PLUS 35C LPG (GC 47-583-31)
manualmanualBIASI appliance manual — ADVANCE PLUS 25C ERP (GC 47-583-35), ADVANCE PLUS 25C ERP LPG (GC 47-583-35), ADVANCE PLUS 30C ERP (GC 47-583-36), ADVANCE PLUS 30C ERP LPG (GC 47-583-36), ADVANCE PLUS 35C ERP (GC 47-583-37), ADVANCE PLUS 35C ERP LPG (GC 47-583-37)
manualmanualBIASI appliance manual — BASICA COND M275V.2024 SM (GC 47-583-49), BASICA COND M275V.2428 SM (GC 47-583-50), BASICA COND M275V.2832 SM (GC 47-583-51)
manualmanualBIASI appliance manual — GARDA HE M96.24SM/B (GC 47-970-25), GARDA HE M96.24SM/D (GC 47-970-27), GARDA HE M96.28SM/B (GC 47-970-26), GARDA HE M96.28SM/D (GC 47-970-28)
manualmanualBIASI appliance manual — GARDA HE M96.24SM/B2 (GC 47-583-03A), GARDA HE M96.24SM/D2 (GC 47-583-03B), GARDA HE M96.28SM/B2 (GC 47-583-04A), GARDA HE M96.28SM/D2 (GC 47-583-04B)
manualmanualBIASI appliance manual — GARDA HE MK2 M96A.24SM/B (GC 47-583-15), GARDA HE MK2 M96A.28SM/B (GC 47-583-16)
manualmanualBIASI appliance manual — GARDA HE PLUS M110.24SM/E (GC 47-970-31), GARDA HE PLUS M110.32SM/E (GC 47-970-32)
manualmanualBIASI appliance manual — GARDA M110B.24SM/E (GC 47-583-13), GARDA M110B.32SM/E (GC 47-583-14)
manualmanualBIASI appliance manual — GARDA M90F.24S (GC 47-970-19), GARDA M90F.28S (GC 47-970-20), GARDA M90F.32S (GC 47-970-22)
manualmanualBIASI appliance manual — INOVIA 25C (GC 47-583-32), INOVIA 25C LPG (GC 47-583-32), INOVIA 30C (GC 47-583-33), INOVIA 30C LPG (GC 47-583-33), INOVIA 35C (GC 47-583-34), INOVIA 35C LPG (GC 47-583-34)
manualmanualBIASI appliance manual — INOVIA 25C ERP (GC 47-583-38), INOVIA 25C ERP LPG (GC 47-583-38), INOVIA 30C ERP (GC 47-583-39), INOVIA 30C ERP LPG (GC 47-583-39), INOVIA 35C ERP (GC 47-583-40), INOVIA 35C ERP LPG (GC 47-583-40)
manualmanualBIASI appliance manual — PARVA HE M96.24SM/P (GC 47-583-08), PARVA HE M96.28SM/P (GC 47-583-09), PARVA HE M96.32SM/P (GC 47-583-10)
manualmanualBIASI appliance manual — PARVA M90 - 24S (GC 47-970-13), PARVA M90 - 28S (GC 47-970-14)
manualmanualBIASI appliance manual — RINNOVA ADAPTIVE M300V.2025 SM (GC 47-583-46), RINNOVA ADAPTIVE M300V.2530 SM (GC 47-583-47), RINNOVA ADAPTIVE M300V.3035 SM (GC 47-583-48)
manualmanualBIASI appliance manual — RIVA ADVANCE HE M110.24SM/C (GC 47-970-29), RIVA ADVANCE HE M110.32SM/C (GC 47-970-30)
manualmanualBIASI appliance manual — RIVA ADVANCE HE M110B.24SM/C (GC 47-583-11), RIVA ADVANCE HE M110B.32SM/C (GC 47-583-12)
manualmanualBIASI appliance manual — RIVA COMPACT HE M96.24SM/C (GC 47-970-23), RIVA COMPACT HE M96.28SM/C (GC 47-970-24)
manualmanualBIASI appliance manual — RIVA COMPACT HE M96.24SM/C2 (GC 47-583-05), RIVA COMPACT HE M96.28SM/C2 (GC 47-583-06), RIVA COMPACT HE M96.32SM/C2 (GC 47-583-07)
manualmanualBIASI appliance manual — RIVA COMPACT HE M96A.24SM/C (GC 47-583-17), RIVA COMPACT HE M96A.28SM/C (GC 47-583-18), RIVA COMPACT HE M96A.32SM/C (GC 47-583-19)
manualmanualBIASI appliance manual — RIVA COMPACT M90E.24S (GC 47-970-17), RIVA COMPACT M90E.28S (GC 47-970-18), RIVA COMPACT M90E.32S (GC 47-970-21)
manualmanualBIASI appliance manual — RIVA PLUS HE 24C ERP (GC 47-583-41), RIVA PLUS HE 24C ERP LPG (GC 47-583-41), RIVA PLUS HE 28C ERP (GC 47-583-42), RIVA PLUS HE 28C ERP LPG (GC 47-583-42)
manualmanualBIASI appliance manual — RIVA PLUS HE M296.24SM/C (GC 47-583-24), RIVA PLUS HE M296.24SM/C LPG (GC 47-583-24), RIVA PLUS HE M296.28SM/C (GC 47-583-25), RIVA PLUS HE M296.28SM/C LPG (GC 47-583-25)
manualmanualBIASI appliance manual — RIVA PLUS M90D.24S (GC 47-970-15), RIVA PLUS M90D.28S (GC 47-970-16)
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