Baxi 8 Litre Expansion Vessel – the perfect match for Duo‑Tec, Megaflo, Promax and other Baxi combi boilers. This genuine replacement part (Part No 5114691 / 5662620) safeguards your closed‑system heating loop by absorbing pressure spikes, keeping the boiler running smoothly and extending its life.
Key specifications
– Capacity: 8 L (flat, rectangular design for tight spaces)
– Working pressure: 3 bar (pre‑load 1.5 bar)
– Dimensions: 438 × 250 × 86 mm; weight ≈ 4.75 kg
– Connection: 3/8″ male gas thread
– Temperature range: ‑10 °C to +90 °C
– Certified to EN13831 & PED 2014/68/EU (DIN 5C033)
Features you’ll love
– Removable safety cap on the air valve for easy servicing
– Durable epoxy‑powder coating resists corrosion and looks sleek
– Rubber diaphragm membrane ensures reliable air‑water separation
– QR‑code label gives instant access to the installation manual
Designed for a wide range of Baxi models—including Duo‑Tec 24/28/33/40, Megaflo 15‑32, Promax 12‑32 and Platinum/Titanium series—this expansion vessel fits seamlessly into existing installations. Replace a faulty tank quickly, restore optimal pressure balance, and enjoy quieter, more efficient heating.
Upgrade your boiler’s safety and performance with the Baxi 8 L Expansion Vessel – genuine quality, easy fit, lasting protection.
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