Alpha
Alpha Pressure Tube Nut 1.011749
M8 x 0.5 pressure tube nut for Alpha CB28, CB28X and CB50 LPG gas boilers.
At a glance
- Also known as NUT-FOR-PRESSTUBEM8X05-CB28CB50, NUT-MX10, 1250030
Showing prices
£5.89
£4.91 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 pressure tube nut, part number 1.011749, is an M8 x 0.5 threaded nut for the pressure tube connection on Alpha gas boilers. It is used on the CB series LPG models listed below.
Signs this part needs replacing
- Visible weeping or a leak at the pressure tube connection
- Corrosion or rust on the nut body
- Rounded or damaged hex flats from repeated tightening
- The nut will not tighten or hold torque
- Pressure reading faults traced to a loose tube joint
Before you order
- Confirm your boiler model matches one in the fit list
- Check the existing nut thread size is M8 x 0.5
- Inspect the pressure tube and its connection point for damage before refitting
- Have the boiler model and serial number to hand
Compliance
| Alternative numbers | NUT-FOR-PRESSTUBEM8X05-CB28CB50, NUT-MX10, 1250030 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA CB28 | 47-532-16 | 47-532-16 | — | — |
| ALPHA CB28 (LPG) | — | — | — | |
| ALPHA CB28X | 47-532-17 | 47-532-17 | — | — |
| ALPHA CB28X (LPG) | — | — | — | |
| 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.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.