Andrews
Andrews O-Ring Pressure Tube 4mm 7700301
4mm O-ring for the back pressure tube on Andrews Fastflo WHI49 and LWHI49 water heaters.
At a glance
- Part type: O-ring
- Appliance family: Fastflo water heaters
- Also known as 1822860
Showing prices
£3.71
£3.09 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
This is a 4mm O-ring for the back pressure tube, supplied by Andrews for their Fastflo water heater range. It seals the pressure tube connection at the rear of the appliance. It is listed for the WHI49 and LWHI49 models.
Signs this part needs replacing
- Water weeping or dripping at the back pressure tube connection
- The O-ring looks flattened, cracked or hardened
- Scale or debris has built up around the seal
- Repeated pressure loss at the tube joint
Before you order
- Confirm your appliance model matches one of the models listed above
- Check that a 4mm O-ring for the back pressure tube position is what your appliance requires
- Inspect the pressure tube and any adjacent seals for wear while access is available
Compliance
| Alternative numbers | 1822860 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ANDREWS WATER HEATERS ANDREWS HOT WATER SPARES | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO LWHI49 | — | — | — | |
| ANDREWS WATER HEATERS FASTFLO WHI49 | — | — | — |
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.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.