Worcester Bosch
Worcester Bosch O-Ring 20.22mm x 3.53mm EPDM 87186854900
Worcester Bosch EPDM O-ring, 20.22mm x 3.53mm, pack of 10, for Greenstar 1000 and 2000 series boilers and other Worcester models.
At a glance
- Part type: O-ring seal
- Also known as 1030769
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Showing prices
£7.91
£6.59 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 Worcester Bosch 87186854900 is an EPDM O-ring with a 20.22mm inside diameter and a 3.53mm cord thickness, supplied in a pack of ten. It is a sealing component used within Worcester Bosch Greenstar appliances, where it sits in a joint or housing and compresses to stop water escaping past the mating faces. EPDM 70 compound is chosen for its resistance to hot water and the gradual hardening that affects older rubber seals.
Signs this part needs replacing
- Weeping or dripping at the joint the O-ring seals
- Visible flattening, cracking or hardening of the rubber
- Scale, sludge or debris trapped on the sealing face
- Damp staining or surface corrosion around the housing
- Repeated pressure loss traced back to a joint that will not seal
Before you order
- Check the GC number on the appliance data plate against the compatibility list to confirm the model.
- Cross-reference the alternative number 1030769 against the part being removed.
- Confirm how many O-rings the repair needs; this part is supplied as a pack of ten.
- 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 |
|---|---|
| Material | EPDM 70 |
| Length | 0.1mm |
| Width | 0.1mm |
| Depth | 0.1mm |
Compliance
| Manufacturer part number (MPN) | 87186854900 |
|---|---|
| GC number | J04-446 |
| Barcode / EAN | 4047416333762 |
| Commodity code | 4016 93 00 00 |
| GPC classification | Household Boilers/Furnaces/Tank Water Heaters Replacement Parts/Accessories |
| Alternative numbers | 1030769 |
Logistics
| Pack quantity | 10 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER GREENSTAR 1000 SERIES GR1000W 24 C NG | 47-800-38 | 47-800-38 | — | — |
| WORCESTER GREENSTAR 1000 SERIES GR1000W 30 C NG | 47-800-39 | 47-800-39 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C LPG | 47-800-35 | 47-800-35 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 25 C NG | 47-800-34 | 47-800-34 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C LPG | 47-800-37 | 47-800-37 | — | — |
| WORCESTER GREENSTAR 2000 COMBI GR2301iW 30 C NG | 47-800-36 | 47-800-36 | — | — |
| WORCESTER GREENSTAR 25SI COMPACT LPG | 47-406-51 | 47-406-51 | — | — |
| WORCESTER GREENSTAR 25SI COMPACT NG | 47-406-50 | 47-406-50 | — | — |
| WORCESTER GREENSTAR 25Si ErP COMPACT LPG | 47-407-74 | 47-407-74 | — | — |
| WORCESTER GREENSTAR 25Si ErP COMPACT NG | 47-406-73 | 47-406-73 | — | — |
Showing 10 of 109 compatible appliances.
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.
manual
WORCESTER appliance manual — GREENSTAR 25SI COMPACT LPG (GC 47-406-51), GREENSTAR 25SI COMPACT NG (GC 47-406-50), GREENSTAR 30 SI COMPACT LPG (GC 47-406-53), GREENSTAR 30 SI COMPACT NG (GC 47-406-52)
manualmanualWORCESTER appliance manual — GREENSTAR 25Si ErP COMPACT LPG (GC 47-407-74), GREENSTAR 25Si ErP COMPACT NG (GC 47-406-73), GREENSTAR 28Si ErP COMPACT, GREENSTAR 30Si ErP COMPACT LPG (GC 47-406-76), GREENSTAR 30Si ErP COMPACT NG (GC 47-406-75)
manualmanualWORCESTER appliance manual — GREENSTAR 27I COMPACT SYSTEM LPG (GC 41-406-14), GREENSTAR 27I COMPACT SYSTEM NG (GC 41-406-13), GREENSTAR 30I COMPACT SYSTEM LPG (GC 41-406-16), GREENSTAR 30I COMPACT SYSTEM NG (GC 41-406-15)
manualmanualWORCESTER appliance manual — GREENSTAR 27Ri ErP COMPACT LPG (GC 41-406-55), GREENSTAR 27Ri ErP COMPACT NG (GC 41-406-54), GREENSTAR 30Ri ErP COMPACT LPG (GC 41-406-57), GREENSTAR 30Ri ErP COMPACT NG (GC 41-406-56)
manualmanualWORCESTER appliance manual — GREENSTAR 27i ErP SYSTEM COMPACT LPG (GC 41-406-59), GREENSTAR 27i ErP SYSTEM COMPACT NG (GC 41-406-58), GREENSTAR 30i ErP SYSTEM COMPACT LPG (GC 41-406-61), GREENSTAR 30i ErP SYSTEM COMPACT NG (GC 41-406-60)
manualmanualWORCESTER appliance manual — GREENSTAR 28 CDI COMPACT LPG (GC 47-406-45), GREENSTAR 28 CDI COMPACT NG (GC 47-406-44)
manualmanualWORCESTER appliance manual — GREENSTAR 28CDi ErP COMPACT LPG (GC 47-406-78), GREENSTAR 28CDi ErP COMPACT NG (GC 47-406-77), GREENSTAR 32CDi ErP COMPACT LPG (GC 47-406-80), GREENSTAR 32CDi ErP COMPACT NG (GC 47-406-79), GREENSTAR 36CDi ErP COMPACT LPG (GC 47-406-82), GREENSTAR 36CDi ErP COMPACT NG (GC 47-406-81)
manualmanualWORCESTER appliance manual — GREENSTAR 32CDI COMPACT LPG (GC 47-406-47), GREENSTAR 32CDI COMPACT NG (GC 47-406-46), GREENSTAR 36CDI COMPACT LPG (GC 47-406-49), GREENSTAR 36CDI COMPACT NG (GC 47-406-48)
manualmanualWORCESTER appliance manual — GREENSTAR HEATSLAVE II 12/18 ErP, GREENSTAR HEATSLAVE II 18/25 ErP, GREENSTAR HEATSLAVE II 25/32 ErP
manualmanualWORCESTER appliance manual — GREENSTAR HEATSLAVE II EXT 12/18 ErP, GREENSTAR HEATSLAVE II EXT 18/25 ErP, GREENSTAR HEATSLAVE II EXT 25/32 ErP
manualmanualWORCESTER appliance manual — GREENSTAR RI 27KW COMPACT LPG (GC 41-406-18), GREENSTAR RI 27KW COMPACT NG (GC 41-406-17), GREENSTAR Ri 30KW COMPACT LPG (GC 41-406-20), GREENSTAR Ri 30KW COMPACT NG (GC 41-406-19)
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