Expansion Vessel – 12L

The 12L Expansion Vessel is designed to safely absorb pressure changes within sealed heating and hot water systems, helping to maintain stable system pressure and protect components from stress caused by thermal expansion. It provides a reliable buffer that prevents excessive pressure build-up, ensuring efficient and safe system operation.

Suitable for domestic and light commercial applications, this compact vessel features a durable carbon steel construction with an internal diaphragm that separates air and water chambers. It is pre-pressurised for ease of installation and designed for long-term performance in closed-loop systems.

Key features:

• 12-litre capacity suitable for heating and potable systems
• Absorbs system pressure fluctuations caused by thermal expansion
• Durable carbon steel construction with internal diaphragm
• Pre-pressurised for quick and easy installation
• Helps protect boilers, pipework, and system components
• Suitable for domestic and light commercial applications
• Compact design for straightforward installation in tight spaces

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DELIVERY OPTIONS:

We currently offer two shipping options to get your goods to you in a timeframe that suits:

Standard delivery to mainland UK (3-5 working days) – £9.99
Next working day delivery to mainland UK* – £11.99

*Next working day deliveries are subject to orders being placed before 1pm. The delivery window for next working day deliveries is between 8am and 5.30pm. 

All orders received after 1pm on a Friday (including weekend orders), that have upgraded to next working day delivery, will be despatched on Monday for a Tuesday delivery.

Bank holidays are treated in the same way as a non-working day, so please take this additional delivery time into account when ordering.

Pallet Delivery
Next day pallet delivery to mainland UK – £72.00

Special delivery requirements
Can’t see what you’re looking for? If you require a delivery option that is not offered as standard on the website, please contact our team. Where possible we try to accommodate additional requirements, including timed delivery options and deliveries to non-mainland UK addresses.

Please note: We rely upon the services of third party couriers, and whilst we endeavour to always deliver in a timely manner there are unfortunately a few occasions when the couriers fail to deliver on the appointed day and before the specified time. Whilst this happens rarely, we cannot be held responsible for the late delivery of an item, or any costs incurred by customers’ tradespeople unable to work. Please ensure that you have your materials before booking in any trades. If your product has been delayed, we will do our best to keep you informed of any new estimated time and date of your delivery.

NEED HELP?
Our customer support team is here to help with any queries about your order and delivery requirements.

Email: customerservices@tradeunderfloor.co.uk

Call: 01283 850040 

Monday to Friday | 8:30am – 4:30pm