Navien
Navien Gear Pump 30021151B
Gear pump for Navien LCB 700 combi, regular and system boilers, part number 30021151B.
At a glance
- Appliance family: Navien LCB 700
£277.08
£230.90 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 Navien gear pump, part number 30021151B, is a circulation component used in Navien LCB 700 boilers. It forms part of the boiler's water circuit, moving water through the appliance during heating and hot water operation. This part is listed for the Navien LCB 700 range across combi, regular and system variants.
Signs this part needs replacing
- Unusual whining, grinding or rattling from the pump area during operation
- Reduced heating or hot water performance linked to poor circulation
- The boiler overheating or cycling more frequently than normal
- The pump failing to run when the boiler calls for heat
- Visible leaks, weeping or damage around the pump body or connections
Before you order
- Check the boiler model and serial number against the fitment list
- Confirm the appliance is a Navien LCB 700 combi, regular or system model
- Verify the existing part number is 30021151B before ordering
- Inspect the pump connections and surrounding pipework for damage or leaks
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN LCB 700 COMBI EXTERNAL 21KW (Serial Number 1705) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 21KW (Serial Number 1705) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 28KW (Serial Number 1710) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI EXTERNAL 36KW (Serial Number 1709) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 21KW (Serial Number 1704) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 21KW (Serial Number 1704) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — | |
| NAVIEN LCB 700 COMBI INTERNAL 28KW (Serial Number 1706) | — | — | — |
Showing 10 of 36 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.
No technical questions yet for this part.
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