Worcester Bosch
Worcester Bosch Unit Union 87133011170
Worcester Bosch unit union, part 87133011170, for Greenstar combi and condensing boilers. GC number E74-547.
At a glance
- Part type: Hoses and pipes
- Also known as 1012751
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Showing prices
£5.04
£4.20 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 87133011170 unit union is a pipework connection component used in the hydraulic assembly of Worcester Bosch gas boilers. It forms a sealed mechanical joint between pipe ends within the unit, and sits in the hoses and pipes group of parts for the Greenstar range. It is a serviceable item, so it can be renewed when the joint at that point begins to weep or corrode.
Signs this part needs replacing
- Water weeping or dripping from the union joint while the boiler is running or pressurised
- Visible corrosion, pitting or scale on the union faces or threads
- Damp staining, mineral deposits or crusting around the connection
- System pressure loss traced to the joint rather than to the boiler or radiators
- Slackness or movement at the pipe connection when the joint is checked
Before you order
- Confirm the GC number and appliance serial number against the compatibility list before ordering.
- The alternative number 1012751 may appear on older documentation for the same part.
- Check whether a new sealing washer or gasket is needed for the joint being worked on.
- This part is fitted to a gas appliance; installation must be carried out by a Gas Safe registered engineer.
Mechanical
| Part type | Hoses and pipes |
|---|
Compliance
| Manufacturer part number (MPN) | 87133011170 |
|---|---|
| GC number | E74-547 |
| Barcode / EAN | 4010009616795 |
| Commodity code | 7412 20 00 00 |
| GPC classification | Connectors - Water, Gas, Central Heating and Air Conduits |
| Alternative numbers | 1012751 |
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| WORCESTER BRITISH GAS GREENSTAR CC1-FSN-GB NG 29KW COMBI | 47-108-05 | 47-108-05 | — | — |
| WORCESTER BRITISH GAS GREENSTAR GREENSTAR HE PLUS-FSN- GB28KW | 47-311-56 | 47-311-56 | — | — |
| WORCESTER BRITISH GAS GREENSTAR GREENSTAR HE-FSN-GB NG 27KW | 47-311-55 | 47-311-55 | — | — |
| WORCESTER BRITISH GAS GREENSTAR ICC2-FSN-GB NAT 30KW COND COM | 41-108-09 | 41-108-09 | — | — |
| WORCESTER BRITISH GAS GREENSTAR ICC2-FSN-GB NAT 37KW COND COM | 41-108-10 | 41-108-10 | — | — |
| WORCESTER BRITISH GAS GREENSTAR RD428 | 41-108-07 | 41-108-07 | — | — |
| WORCESTER BRITISH GAS GREENSTAR RD537I | 47-108-11 | 47-108-11 | — | — |
| WORCESTER BRITISH GAS RD430I | 41-108-06 | 41-108-06 | — | — |
| WORCESTER BRITISH GAS RD532 | 47-108-13 | 47-108-13 | — | — |
| WORCESTER BRITISH GAS RD532I | 47-108-10 | 47-108-10 | — | — |
Showing 10 of 60 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 — BRITISH GAS GREENSTAR ICC2-FSN-GB NAT 30KW COND COM (GC 41-108-09), BRITISH GAS GREENSTAR ICC2-FSN-GB NAT 37KW COND COM (GC 41-108-10)
manualmanualWORCESTER appliance manual — CS1 RSF 28KW NG (GC 41-108-02)
manualmanualWORCESTER appliance manual — GREENSTAR 25 HE (GC 47-311-73), GREENSTAR 30 HE COMBI (GC 47-311-74)
manualmanualWORCESTER appliance manual — GREENSTAR 28 HE SYSTEM (GC 41-311-58)
manualmanualWORCESTER appliance manual — GREENSTAR 29 HE CONVENTIONAL (JAN 2003) (GC 41-311-59), GREENSTAR 29 HE CONVENTIONAL (JUN 2002) (GC 41-311-56)
manualmanualWORCESTER appliance manual — GREENSTAR 30 HE PLUS COMBI (GC 47-311-75), GREENSTAR 35 HE PLUS COMBI (GC 47-311-76), GREENSTAR HE PLUS-FSN-GB35KW (GC 47-311-57)
manualmanualWORCESTER appliance manual — GREENSTAR FS 30CDi ErP REGULAR LPG (GC 41-406-63), GREENSTAR FS 30CDi ErP REGULAR NG (GC 41-406-62), GREENSTAR FS 42CDi ErP REGULAR LPG (GC 41-406-65), GREENSTAR FS 42CDi ErP REGULAR NG (GC 41-406-64)
manualmanualWORCESTER appliance manual — GREENSTAR FS30 CDI REGULAR (GC 41-406-62), GREENSTAR FS30 CDI REGULAR LPG (GC 41-406-63), GREENSTAR FS42 CDI REGULAR (GC 41-406-64), GREENSTAR FS42 CDI REGULAR LPG (GC 41-406-65)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440 (GC 47-311-82)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDI LPG (GC 47-406-26), GREENSTAR HIGHFLOW 440CDI NG (GC 47-406-24), GREENSTAR HIGHFLOW 550CDI LPG (GC 47-406-25), GREENSTAR HIGHFLOW 550CDI NG (GC 47-406-27)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDi ErP LPG (7731600099) (GC 47-406-90), GREENSTAR HIGHFLOW 440CDi ErP NG (7731600098) (GC 47-406-89), GREENSTAR HIGHFLOW 550CDi ErP LPG (7731600101) (GC 47-406-92), GREENSTAR HIGHFLOW 550CDi ErP NG (7731600100) (GC 47-406-91)
manualmanualWORCESTER appliance manual — GREENSTAR HIGHFLOW 440CDi ErP LPG (7738100590) (GC 47-406-86), GREENSTAR HIGHFLOW 440CDi ErP NG (7738100589) (GC 47-406-85), GREENSTAR HIGHFLOW 550CDi ErP LPG (7738100592) (GC 47-406-88), GREENSTAR HIGHFLOW 550CDi ErP NG (7738100591) (GC 47-406-87)
manualmanualWORCESTER appliance manual — GREENSTAR R25HE COMBI (GC 47-311-77), GREENSTAR R30HE COMBI (GC 47-311-78)
manualmanualWORCESTER appliance manual — GREENSTAR R28HE SYSTEM (GC 41-311-62)
manualmanualWORCESTER appliance manual — GREENSTAR R29HE CONVENTIONAL (GC 41-311-60), GREENSTAR R40HE CONVENTIONAL (GC 41-311-61)
manualmanualWORCESTER appliance manual — GREENSTAR R30HE PLUS COMBI (GC 47-311-79), GREENSTAR R35HE PLUS COMBI (GC 47-311-80), GREENSTAR R40HE PLUS COMBI (GC 47-311-81)
manualmanualWORCESTER appliance manual — ICS1 RSF 28KW NG (GC 41-108-04)
manualNo technical questions yet for this part.
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