Flamco Expansion Vessel - 18 Litre
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B&QB&Q - FlamcoContra-Flex Heating Expansion Vessel 18 Litre & Sealed System Kit
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Product Information
Full details
The Flamco Expansion Vessel - 18 Litre is designed for sealed heating systems, offering crucial pressure regulation. It's ideal for homeowners and heating engineers seeking a reliable component to protect their central heating systems from over-pressurization. While it provides robust performance, ensure correct installation to maintain system integrity. Key features include a flexible rubber diaphragm with rolling action, a deep drawn zinc-plated steel clench ring, and compatibility with up to 50% glycol-based anti-freeze.
All features
| Model Part Number | 18 |
|---|---|
| Brand | Flamco |
Extended Product Information
FAQs
What is the purpose of an expansion vessel?
An expansion vessel absorbs the increased volume of water in a sealed heating system as it heats up, preventing dangerous over-pressurization and protecting system components.
Can this vessel be used with anti-freeze?
Yes, the Flamco Contra-Flex 18 Litre is suitable for systems containing glycol-based anti-freeze up to a concentration of 50%.
Is this vessel suitable for domestic hot water systems?
No, this expansion vessel is specifically designed for sealed central heating systems and is not suitable for potable (drinking) water applications.
How do I know if my system needs an 18-litre vessel?
The required vessel size depends on the total water volume of your heating system. Consult your heating engineer or the system's design specifications for the correct size.
What does 'rolling action diaphragm' mean?
It describes the mechanism of the flexible diaphragm inside the vessel. This design allows the diaphragm to flex smoothly without folding or stressing, which increases its lifespan and maintains consistent performance.
Where should the expansion vessel be installed?
Typically, it is installed on the return pipework of the central heating system, close to the boiler. Installation should be performed by a qualified professional.
Troubleshooting
System pressure is too high or fluctuating widely.
Check the pre-charge pressure of the vessel using a suitable gauge. Ensure it matches the system's static fill pressure. Verify the diaphragm is intact and not ruptured. Consult a professional if unsure.
The vessel appears to be leaking.
Inspect all connection points for tightness. If a leak is present from the vessel body or fittings, the unit may need replacement. Turn off the system and contact a qualified engineer.
System pressure is consistently low.
While not always the vessel's fault, a faulty diaphragm could allow water to enter the air charge, reducing its effectiveness. Check system fill levels and for any leaks elsewhere in the system.
Pros and Cons
Pros
- Ensures consistent system pressure, preventing damage to components.
- Durable construction with a rolling diaphragm for extended service life.
- Compatible with common anti-freeze solutions for enhanced system protection.
- Designed to meet stringent European safety standards.
- Robust build quality suitable for demanding heating applications.
Cons
- Requires professional installation for optimal performance and safety.
- Not designed for potable water systems.
- Specific capacity may be oversized for very small heating circuits.
Setup, Compatibility & Care
Setup:
- Ensure the heating system is completely isolated from the mains supply and depressurized.
- Identify a suitable location in the system, typically on the return pipework near the boiler.
- Connect the vessel to the system using appropriate plumbing fittings. Ensure a secure, leak-free connection.
- It is highly recommended that installation is carried out by a qualified heating engineer.
Compatibility:
- Primarily designed for sealed central heating systems.
- Suitable for systems containing glycol-based anti-freeze up to 50% concentration.
- Not suitable for use with potable (drinking) water systems.
Care:
- Regularly check the system pressure gauge to ensure it remains within the manufacturer's recommended range.
- Inspect the vessel periodically for any signs of corrosion or damage.
- Avoid exposing the vessel to extreme temperatures outside of its operating parameters.