Navien
Navien Pipe Cold Water Inlet 30029240A
Cold water inlet pipe for the Navien NCB300-28K Combi boiler, part number 30029240A.
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£50.52
£42.10 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 Navien 30029240A is a cold water inlet pipe for the Navien NCB300-28K Combi boiler. It carries cold mains water into the appliance as part of the boiler's water circuit.
Signs this part needs replacing
- Water leaking from the pipe or its connections
- Visible corrosion, scale or frost damage on the pipe
- Reduced cold water flow into the boiler
- Boiler pressure dropping or failing to hold pressure
- Damp patches around the boiler casing or pipework
Before you order
- Confirm the appliance model is Navien Ncb300-28K Combi.
- Check the existing part number is 30029240A.
- Inspect the pipe connections and seals for damage before fitting.
- Isolate the cold water supply before removing the old pipe.
No specification data held for this part.
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| NAVIEN NCB300-28K COMBI - (Serial Number 3710) | — | — | — | |
| NAVIEN NCB300-28K COMBI - (Serial Number 3710) | — | — | — |
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.
No technical questions yet for this part.
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