The Potterton RP250 8 Litre Expansion Vessel is the perfect genuine replacement for Heatmax, Promax and Gold Combi boilers. Designed to keep your closed‑system heating safe, the vessel’s air‑filled diaphragm cushions pressure spikes, preventing damage to pipes and radiators.
Why it works
– Flat rectangular shape – fits snugly in tight boiler cupboards and maximises space.
– Robust construction – epoxy‑powder coating resists oxidation; a rubber diaphragm ensures long‑lasting reliability.
– Easy service – pre‑loaded at 1.5 bar with a removable safety cap and a 3/8″ male gas connection for quick installation.
Key specifications
| Feature | Detail |
|---|---|
| Capacity | 8 L |
| Max working pressure | 3 bar |
| Dimensions (L × W × H) | 438 mm × 250 mm × 86 mm |
| Temperature range | –10 °C to +90 °C |
| Weight | 4.75 kg |
| Compliance | EN13831, PED 2014/68/EU, DIN 5C033 |
The RP250 is compatible with a wide range of Potterton models—including Heatmax Combi 24HE/28HE/33HE, Promax 12‑32HE series and Gold Combi units—making it a versatile stock item for installers and DIYers alike.
A scannable QR code on the label links directly to the product manual, so you’ll have all the guidance you need at your fingertips. Choose the genuine Potterton expansion vessel for dependable pressure control and peace of mind in every heating system.
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