Alpha
Alpha Hydraulic Assembly Seal Kit 3.018996
At a glance
- Part type: Gaskets, Seals & Washers
- Also known as 1257931
£33.91
£28.26 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
The Alpha Hydraulic Assembly Seal Kit is a service kit of seals, O-rings and washers used to rebuild the hydraulic assembly on Alpha gas appliances. It is produced by Alpha and supplied under part number 3.018996. The kit restores the sealing faces inside the hydraulic assembly so that water and system pressure are held where they belong, keeping the component working as the manufacturer intended.
Signs this part needs replacing
- Water weeping or dripping from around the hydraulic assembly body.
- Persistent pressure loss on the system that cannot be traced to any other component.
- Visible hardening, flattening, cracking or swelling of the seals once the assembly is opened.
- Scale or debris trapped on the sealing faces, causing a poor seat and a slow leak.
- Repeated need to top up system pressure between services.
Before you order
- Check the GC number on the appliance data badge against the list above to confirm the correct kit for the model.
- Confirm the appliance model and, where relevant, the serial number before ordering, as Alpha used this hydraulic assembly across several variants.
- Inspect the hydraulic assembly before ordering to establish whether a full seal kit is needed or only individual seals.
Mechanical
| Part type | Gaskets, Seals & Washers |
|---|---|
| Length | 0.1mm |
| Width | 0.1mm |
| Depth | 0.1mm |
Compliance
| Manufacturer part number (MPN) | 3.018996 |
|---|---|
| GC number | 41-532-16, 41-532-17, 41-532-18, 41-532-19, 41-532-20, 41-532-21, 47-532-37, 47-532-38, 47-532-39, 47-532-40 |
| Barcode / EAN | 8015065396465 |
| Commodity code | 8484 90 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 1257931 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ALPHA ALPHA CD12S | — | — | — | |
| ALPHA ALPHA CD20S | — | — | — | |
| ALPHA ALPHA GASSAVER GS-1 | — | — | — | |
| ALPHA ALPHA PREMIERPACK | — | — | — | |
| ALPHA CD12S | 41-532-16 | 41-532-16 | — | — |
| ALPHA CD12S (LPG) | 41-532-17 | 41-532-17 | — | — |
| ALPHA CD20S | 41-532-18 | 41-532-18 | — | — |
| ALPHA CD20S (LPG) | 41-532-19 | 41-532-19 | — | — |
| ALPHA CD25X | 47-532-39 | 47-532-39 | — | — |
| ALPHA CD25X (LPG) | 47-532-40 | 47-532-40 | — | — |
Showing 10 of 14 compatible appliances.
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.
ALPHA appliance manual — CD12S (GC 41-532-16), CD12S (LPG) (GC 41-532-17), CD20S (GC 41-532-18), CD20S (LPG) (GC 41-532-19), CD28S (GC 41-532-20), CD28S (LPG) (GC 41-532-21)
manualmanualALPHA appliance manual — CD25X (GC 47-532-39), CD25X (LPG) (GC 47-532-40), CD28X (GC 47-532-37), CD28X (LPG) (GC 47-532-38)
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