Arleigh
Arleigh diverter valve diaphragm NS808
Arleigh NS808 diverter valve diaphragm, directing a combi boiler's hot water between heating and domestic hot water.
At a glance
- Part type: diverter valve diaphragm
- Also known as 2950040
- Drain down and isolate the system before fitting; use a Gas Safe registered engineer
£19.92
£16.60 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 NS808 is a diaphragm manufactured by Arleigh for a combi boiler's diverter valve, the component that directs hot water to the central heating or to the domestic hot water system without a separate cylinder.
Signs this part needs replacing
- No hot water at taps while the heating still works, or the reverse
- Diverter valve sticking or failing to switch
- Water hammer or juddering when hot water demand switches
- Reduced flow or pressure at taps
Before you order
- Match the part number printed on your existing diaphragm
- Check whether a full diverter valve kit is needed instead of the diaphragm alone
- Drain down and isolate the system before fitting; use a Gas Safe registered engineer
Compliance
| Alternative numbers | 2950040 |
|---|
No fitment data held for this part.
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 documents held for this part. The technical team will source them 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.