Navien
Navien Plate Washer 20009950A
Plate washer for Navien LCB 700 combi, regular and system boilers, covering 21kW, 28kW and 36kW internal and external models.
At a glance
- Part type: plate washer
- Appliance family: Navien 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 plate washer 20009950A is a sealing component used in Navien LCB 700 boilers. It sits between mating surfaces to form a watertight joint and prevent weeping at the connection. It is used during service and repair across the LCB 700 range.
Signs this part needs replacing
- Water weeping or dripping from the joint the washer seals
- Visible corrosion, pitting or flattening of the washer face
- Scale or debris trapped on the sealing surface
- Repeated pressure loss traced back to the joint
- Hardening or discolouration of the washer material
Before you order
- Confirm the appliance is a Navien LCB 700 and note the serial number
- Check whether the boiler is the internal or external variant
- Confirm the output rating: 21kW, 28kW or 36kW
- Check how many washers the joint requires before ordering
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.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.