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Zilmet Expansion Vessel - 80L - 1300008000

Zilmet Expansion Vessel - 80L - 1300008000

This Zilmet expansion vessel is designed to be suitable for all types of heating systems. It featu...

Best current price£255.92from City Plumbing GB

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City Plumbing GBZilmet 80L Floor Standing Expansion Vessel 1300008000
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£255.92
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B&QB&Q - Zilmet 80L Floor Standing Expansion Vessel 1300008000
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£332.70
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Product Information

Full details

The Zilmet 80L Expansion Vessel is an essential component for professional heating engineers and homeowners seeking to manage pressure fluctuations in closed-loop heating systems. Designed for reliability, this floor-standing unit provides a robust 80-liter capacity to accommodate thermal expansion, effectively preventing system damage and relief valve discharge. While its significant volume is ideal for larger residential or light commercial setups, users should ensure they have sufficient floor space for installation compared to wall-mounted alternatives.

All features

Model Part Number1300008000
BrandZilmet

Extended Product Information

FAQs

Does this vessel come pre-charged?

Yes, but it should be verified by the installer to match the specific pressure requirements of your heating system.

Can this be used for potable water?

No, this model is specifically designed for closed-loop heating systems and should not be used for drinking water applications.

How often should I check the vessel?

It is recommended to check the pre-charge pressure during your annual boiler service.

What happens if the internal bladder bursts?

If the bladder fails, the vessel fills with water and can no longer absorb pressure changes, which will lead to constant pressure relief valve discharge.

Is this suitable for underfloor heating?

Yes, it is suitable for underfloor heating systems provided the total system volume is within the capacity limits of the vessel.

Troubleshooting

System pressure continues to rise when heating is on

The vessel may have lost its pre-charge pressure or the internal bladder may have failed; check pressure with a gauge and recharge if necessary.

Water discharges from the pressure relief valve

The expansion vessel is likely undersized or has lost its air charge; verify system volume and check the vessel air pressure.

Pros and Cons

Pros

  • Generous 80-liter capacity suits medium-to-large heating systems
  • Floor-standing design allows for easier placement in utility rooms or basements
  • Reduces the frequency of pressure relief valve activation
  • High-quality construction from a reputable manufacturer
  • Compatible with a wide range of heating configurations

Cons

  • Occupies dedicated floor space
  • Requires professional installation for proper system integration
  • Heavier than wall-mounted models, making initial positioning more labor-intensive

Setup, Compatibility & Care

Installation of the Zilmet 80L expansion vessel should always be carried out by a qualified heating engineer to ensure the system is correctly sized and the pressure is set to match the boiler's requirements.

Installation Steps:

  1. Ensure the system is drained and pressure is released.
  2. Position the vessel on a level surface near the heating circuit connection point.
  3. Connect the vessel to the system using appropriate isolation valves for future maintenance.
  4. Charge the vessel to the required pre-charge pressure before introducing water back into the system.

Care Instructions:

Check the vessel's pre-charge pressure annually as part of a standard boiler service. Over time, internal bladders can lose a small amount of air; recharging this ensures the vessel remains effective throughout the heating season.

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