Navien
Navien Inner Tube Fixing Nut 20009942A
Inner tube fixing nut for Navien LCB 700 combi, regular and system boilers.
At a glance
- Appliance family: LCB 700
£3.91
£3.26 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 Navien inner tube fixing nut, part number 20009942A, is a securing component used on the inner tube assembly of Navien LCB 700 boilers. It holds the inner tube in position and maintains a sound joint within the appliance. The part is manufactured by Navien for use across the LCB 700 combi, regular and system ranges.
Signs this part needs replacing
- The nut is loose and cannot be tightened to hold the inner tube securely
- Weeping or seepage at the inner tube joint
- Visible corrosion, pitting or thread damage on the nut
- The nut has been cross-threaded or rounded during previous work
- The joint will not hold its seal after reassembly
Before you order
- Confirm the appliance is a Navien LCB 700 and note whether it is combi, regular or system
- Check the output rating (21KW, 28KW or 36KW) and whether the unit is internal or external
- Inspect the existing nut and the mating thread for damage before fitting a replacement
- Verify the part number 20009942A against the manufacturer's parts list for your model
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
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