Altecnic Buffer Tank For Heating Pumps 8l - 569008 569008

Altecnic intermediate vessels are manufactured to meet the requirements of the Directive and Regulations listed and are suitable for heating and solar systems.

  • £210.49

How It Works

  • An expansion vessel must ensure the heating/cooling system can work safely, particularly during periods when hot water is not being drawn off.  
  • The water in the system can reach temperatures up to 200°C and consequently the fluid within the system can either evaporate or reach levels that can damage all the components within the energy system over time.  
  • In the event that the diaphragm within the expansion vessel could be subjected to temperatures above 110 ̊C, an intermediate vessel (VDI6002 directive) must be provided to protect the diaphragm.


  • Intermediate vessels should be installed in closed solar or heating systems containing water treated to prevent corrosion. 
  • If the return temperature in solar installation exceeds 100 ̊C or in a heating system exceeds 70 ̊C an intermediate vessel should be installed. 
  • The intermediate vessel should be installed between the heat/cooling source and the expansion vessel. 
  • The function of the vessel is to avoid premature ageing of the diaphragm in the expansion vessel caused by water entering the diaphragm at too high a temperature. 
  • The intermediate vessel holds a quantity of water which is allowed to cool and it is this cooled water which enters the expansion vessel.
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We offer next day delivery on most of our products if received before 3pm the same working day plus free delivery on all orders over £50 + VAT (Please check the individual product page for confirmation)

We operate a NO QUIBBLE returns policy to give you peace of mind when buying. In the unlikely event that the product you order isn't quite what you wanted then get in touch, post it back & we will process your refund when it arrives back with us

Returning Direct items

If you would like the supplier to collect any items that are not needed, there would be a collection and re-handling charge of 25% per item and a charge of £45 + VAT (The £45 + VAT would be per collection, not per invoice or item.)


The handling charges would also increase depending on the date from delivery to collection, 25% is for anything collected within 1 month of delivery to site. Anything over 2 months would be more than the 25% and again for 3, 4, 5 months etc and you would be notified when contacting us.

Last update 13:10 18/08/2022

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