With work progressing nicely at FinhamPark School (see the gallery here), it was time for the header storage tank tower to come down. These days where central heating systems are installed, plumbers and heating engineers are more likely to install a sealed/pressurised system. It means that the heating system is topped up with water manually via a filling loop or via an automatic pressurisation unit and when the required pressure is reached (normally 1.2bar) the supply tap is turned off and the system is totally sealed with no loss of pressure. An expansion vessel will also be installed in the system.
It wasn’t always like this though, and when the heating system at Finham Park School was installed they used a gravity fed system, you might still have one in your house. In simple terms, the water that is pumped around the central heating system is supplied by pipes from a header tank which also provides the pressure for the system via gravity (head pressure). As the supply tank is open it allows for expansion and contraction of the water in the system and is topped up via a ball valve that works similar to that of a ballcock in your toilet. The height of the tank is determined by the pressure of water required and the size of the heating system installed. In the case of Finham Park School, it was a pretty big heating installation requiring a supersized header tank AND tower.
No longer required due to the modern hi-tech engineering methods, boilers and pipework we used, it was time for the header tank tower to come down. We put a case study together outlining the project in more detail here including the system that we used.
It’s been such a big feature of the surrounding area for so many years that we thought it would be a great idea to create a time lapse video showing its demolition. We’re really pleased with the results and hope you are too.
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