Vaillant Expansion Vessel 10 Litres - 181079

The Vaillant Expansion Vessel 10 Litres (Part No. 181079) is a genuine OEM replacement component designed to maintain stable water pressure within Vaillant sealed heating systems. This high-quality 10-litre vessel absorbs excess water pressure as the system heats up, protecting key components such as pumps, valves, and heat exchangers from stress or damage due to thermal expansion.

Manufactured to Vaillant’s precise engineering standards, the 181079 expansion vessel features a durable steel body with an internal diaphragm membrane that separates air and water chambers, ensuring reliable long-term pressure compensation and consistent boiler performance.

Key Features

• Genuine Vaillant expansion vessel – Part No. 181079

• 10-litre capacity for domestic heating systems

• Maintains stable pressure in sealed boiler circuits

• Prevents pressure fluctuations and safety valve discharge

• Built with a robust steel casing and replaceable membrane

• Pre-charged air pressure for simple installation and servicing

• Ensures safe, efficient boiler operation

• Direct OEM-quality replacement for original Vaillant part

Compatibility

• Fits a range of Vaillant ecoTEC, TURBOmax, and ecoMAX boilers

• Suitable for domestic sealed heating and combination systems

• May be used as an auxiliary vessel in system installations requiring additional capacity

When to Replace

• If the boiler pressure frequently drops or rises

• When the vessel is waterlogged or loses air charge

• During boiler service or pressure fault diagnostics

Technical Specifications

• Manufacturer: Vaillant

• Part Number: 181079

• Type: Expansion vessel (sealed system)

• Capacity: 10 litres

• Material: Steel body with rubber diaphragm

• Pressure Rating: 3 bar maximum working pressure

• Pre-Charge Pressure: 0.75 bar (factory set)

• Application: Domestic heating systems with Vaillant boilers