Alpha
Alpha Drain Valve Nut 1.6529
3/8 inch drain valve nut from Alpha, suitable for the Alpha Cb50 (LPG) gas boiler.
At a glance
- Also known as 38-FITTING-DRAIN-VAVLE-NUT-CB50, 1250418
Showing prices
£24.19
£20.16 ex. VAT · VAT at 20%
Available to order · 7 working days
Available to order · 7 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 1.6529 is a 3/8 inch drain valve nut used on Alpha gas boilers. It forms part of the drain valve assembly, securing the valve connection so the appliance can be drained safely during servicing or maintenance.
Signs this part needs replacing
- Water weeping or dripping from the drain valve connection
- The nut is corroded, cracked or visibly damaged
- The nut has rounded off and will not tighten or release cleanly
- The nut is seized on the valve body and cannot be removed without damage
- Signs of scale or staining around the drain valve joint
Before you order
- Confirm your boiler model matches the fitment listed above
- Check the existing fitting size is 3/8 inch
- Check whether the nut alone is required or the complete drain valve assembly
- Compare the part number on the existing component against 1.6529
Compliance
| Alternative numbers | 38-FITTING-DRAIN-VAVLE-NUT-CB50, 16529, 1250418 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA CB50 | 47-532-18 | 47-532-18 | — | — |
| ALPHA CB50 (LPG) | — | — | — |
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.
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