Butt joint of weld mapping of 3D Autocad DWG drawing file is given. The header tank is used to fill the heating system and accommodate the expansion of water during the heating cycle. It has an overflow pipe running to outside, a mains water supply connection to the tank via a ball valve used to fill the system and a cold feed pipe and an open vent pipe. Thanks for downlading Autocad DWG files from our website.
