Alpha
Alpha Flow Regulator 10 Litre Blue 1.020428
Blue 10 litre flow regulator for Alpha gas boilers, part number 1.020428.
At a glance
- Also known as FLOW-REGULATOR-10-LITRE-BLUE, FLOW-REGULATOR-10LMIN-BLUE-CD25X, 1257881
Showing prices
£11.46
£9.55 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 Alpha 1.020428 is a blue 10 litre flow regulator used in Alpha gas boilers. It regulates the rate of water flow through the appliance, helping maintain consistent flow through the heating and hot water circuits.
Signs this part needs replacing
- Reduced or inconsistent water flow at the outlet
- Fluctuating hot water temperature
- Visible damage, cracking or blockage in the regulator body
- Scale or debris build-up restricting flow
- Leaks around the regulator
Before you order
- Confirm your boiler model and GC number against the fitment list
- Check the existing regulator's part number and colour match 1.020428 and blue
- Verify the 10 litre flow rating is correct for your appliance
Compliance
| Alternative numbers | FLOW-REGULATOR-10-LITRE-BLUE, 1020428, FLOW-REGULATOR-10LMIN-BLUE-CD25X, 1257881 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA InTEC 2 25X | — | — | — | |
| ALPHA ALPHA InTEC 2 25XE | — | — | — | |
| ALPHA CD25X | 47-532-39 | 47-532-39 | — | — |
| ALPHA CD25X (LPG) | 47-532-40 | 47-532-40 | — | — |
| ALPHA HE25 | 47-532-41 | 47-532-41 | — | — |
| ALPHA HE25 (LPG) | 47-532-42 | 47-532-42 | — | — |
| ALPHA InTEC 2 25X | 47-532-61 | 47-532-61 | — | — |
| ALPHA InTEC 2 25XE | — | — | — |
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.
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.