header

The problem is, the header doesn'r appear on the schematic. Do we need two headers for flow and return? and after connection pipes into the header it doesn't seam real to connect the incomimg pipe to header..

The problem is, the header doesn'r appear on the schematic. Do we need two headers for flow and return? and after connection pipes into the header it doesn't seam real to connect the incomimg pipe to header..

Headers can only be placed on flow. You should draw your flow pipe to the point you wish the header to be. Then draw the header. Then connect your other flow pipes into the header.

I have made a very simple project available for you to examine. You can download it from here.

Regards,

Thank you! I have downloaded and will try again, I have already spent ages to work out how to do it.

I don't think this is correct, nearly gave up, ended up with some pipe's mess..

If you examine the sample project I provided, its pretty much the same system as you have, but drawn left to right, rather than right to left. You need to draw your main flow pipe in. Connect the header to the main flow pipe then draw your flow sections that lead to the radiators back into the header. It may help to turn the header through 90deg.

Also...you should ideally be connecting into the radiators with twin pipe, again as indicated in my sample schematic.