Worcester Bosch
Worcester Bosch O-Ring Pack 77161922390
Worcester Bosch O-Ring Pack, part 77161922390, for 26 CDi RSF and 26CDi XTRA RSF appliances; seals internal joints to keep the unit watertight.
At a glance
- Part type: Gaskets, O-rings, seals and washers
- Also known as 1011569
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
£26.47
£22.06 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
This is a Worcester Bosch O-Ring Pack, supplied under part number 77161922390. It is a sealing component used inside Worcester Bosch 26 CDi RSF and 26CDi XTRA RSF appliances, where it sits at an internal joint to prevent water escaping past the connection. The O-rings form part of the appliance's sealing arrangement and are replaced when a joint weeps, when a seal has hardened, or during a strip-down where the original seal cannot be reused.
Signs this part needs replacing
- Water weeping or a visible drip from an internal joint on the appliance
- Traces of scale or corrosion staining around a sealing face
- An O-ring that has hardened, flattened or cracked when inspected during a service
- A joint that continues to seep after the appliance has been reassembled
- Loss of system pressure with no other obvious cause found during investigation
Before you order
- Check the appliance GC number and model against the compatibility list, as the same appliance family can use different seals across variants.
- Confirm the part number on the appliance or in the manufacturer's documentation before ordering, and note the alternative number 1011569.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | O-Rings & Lip Seals |
|---|---|
| Length | 0.1mm |
| Width | 0.1mm |
| Depth | 0.1mm |
Compliance
| Manufacturer part number (MPN) | 77161922390 |
|---|---|
| GC number | E04-651 |
| Barcode / EAN | 4010009741923 |
| Commodity code | 4016 93 00 90 |
| Alternative numbers | 1011569 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER 26 CDI RSF NG | 47-311-41 | 47-311-41 | — | — |
| WORCESTER 26 CDI XTRA RSF LPG | 47-311-42 | 47-311-42 | — | — |
| WORCESTER 26 CDI XTRA RSF NG | 47-311-41 | 47-311-41 | — | — |
| WORCESTER WORCESTER 26CDi XTRA RSF LPG | — | — | — | |
| WORCESTER WORCESTER 26CDi XTRA RSF NATURAL GAS | — | — | — |
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.