Is there a rule of thumb for calculating the vertical distance between the boiler and the expansion/feed tank in a vented twin pipe central heating system?
All boilers have a have a maximum working pressure so as long as the head pressure created by the height of the F & E tank does not exceed this I do not see why it would matter.
Most even specify the max working head in meters
10 M gives you 1 bar so you would have to go some to create something bad
As long as all system components working pressures are not exceeded then this would be fine
Many thanks to Carl83 for the reply. However, my concern was focussed on the extent to which expansion of the water in the system when hot would cause an overflow into the header tank with the potential for siphonage rather than the pressure as such. The pressure is a factor which I had not considered so thanks for that.
Any overflow and siphonage problems are caused by poor system design specifically in relation to the positioning of the pump and its proximity to the expansion and feed pipe. Any such issues have no connection to the height of the header tank.
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!
by Edpaterson » Mon Aug 31, 2009 8:01 am 
SitemapIndex
RSS Feed