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Expansion Vessel

Expansion vessels are essential components in heating systems that help manage the expansion and contraction of water due to temperature changes. As the water heats up, it expands in the vessel, creating additional volume.

The expansion vessel absorbs this increase in volume by compressing the air in the chamber. During the cooling phase, the compressed air pushes the water back into the system.

This process prevents excessive pressure build-up, safeguards against damage to the heating system, and ensures optimal performance and longevity.

Expansion vessels are crucial for maintaining the safety and efficiency of heating systems, providing a reliable solution for managing thermal expansion.

For information on how to size an expansion vessel, please click here for our blog.

Showing 33–34 of 34 results

  • Sale! Zilmet 600L Expansion Vessel 1" BSP 2.5 Bar

    Zilmet 600L Expansion Vessel 1″ BSP 2.5 Bar

    Original price was: £1,859.63£1,549.69.Current price is: £1,119.30£932.75. £1,119.30£932.75 inc VAT Incl. VATExcl. VAT

    Zilmet 600L Expansion Vessel 1″ BSP 2.5 Bar  Part No: 1300060000. The Zilmet 600L Expansion Vessel is designed for large, sealed heating systems, helping to absorb increases in water volume as system temperatures rise. Manufactured from carbon steel with a synthetic butyl rubber diaphragm, it helps maintain stable system pressure and protect components from unnecessary…

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  • Sale! Zilmet 700L Expansion Vessel 1" BSP 2.5 Bar

    Zilmet 700L Expansion Vessel 1″ BSP 2.5 Bar

    Original price was: £2,398.20£1,998.50.Current price is: £1,443.47£1,202.89. £1,443.47£1,202.89 inc VAT Incl. VATExcl. VAT

    Zilmet 700L Expansion Vessel 1″ BSP 2.5 Bar  Part No: 1300070000. The Zilmet 700L Expansion Vessel is designed for large, sealed heating systems, helping to absorb increases in water volume as system temperatures rise. Manufactured from carbon steel with a synthetic butyl rubber diaphragm, it helps maintain stable system pressure and protect components from unnecessary…

    Add to BasketDone