Andrews
Andrews Expansion Vessel 7705037
24-litre expansion vessel for Andrews water heaters, including Classicflo, Ecoflo Compact and Hiflo EVO models.
At a glance
- Also known as 1823266
£218.80
£182.33 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 Andrews 7705037 is a 24-litre expansion vessel for Andrews water heaters. It absorbs the expansion of water as it heats, limiting the pressure rise within the sealed system. It is listed for the Classicflo, Ecoflo Compact and Hiflo EVO appliance families.
Signs this part needs replacing
- System pressure rises sharply when the appliance heats up
- Pressure relief valve discharges water during normal operation
- Water or moisture appears at the air valve when checked
- The appliance loses pressure repeatedly with no visible leak elsewhere
- Corrosion or weeping from the vessel shell
Before you order
- Confirm your appliance model against the fit list above
- Check the existing vessel's capacity and physical dimensions match 24 litres
- Verify system pressure and vessel charge before condemning the part
- Isolate and depressurise the appliance before removal
Compliance
| Alternative numbers | 1823266 |
|---|
| Make | Model / assembly | Reference | Years | Fitment |
|---|---|---|---|---|
| ANDREWS WATER HEATERS ANDREWS HOT WATER SPARES | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO 10/105 | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO 10/145 | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO 14/175 | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO 15/270 | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO 20/360 | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO RFF RFF 13/175 | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO RFF RFF 18/270 | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO RSC RSC 9/145 | — | — | — | |
| ANDREWS WATER HEATERS CLASSICFLO RSC RSC 9/180 | — | — | — |
Showing 10 of 17 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.
ANDREWS WATER HEATERS appliance manual — CLASSICFLO 10/105, CLASSICFLO 10/145, CLASSICFLO 14/175, CLASSICFLO 15/270, CLASSICFLO 20/360
manualmanualANDREWS WATER HEATERS appliance manual — CLASSICFLO RFF RFF 13/175, CLASSICFLO RFF RFF 18/270
manualmanualANDREWS WATER HEATERS appliance manual — HIFLO EVO 30/300, HIFLO EVO 48/300, HIFLO EVO 48/380, HIFLO EVO 65/300, HIFLO EVO 65/380
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