Section details Chill water riser of the hospital building shown in the 2D AutocAD DWG drawing file. Detail of pipe riser is given in this drawing file. Butter fly valve, balancing valve, clevis hanger, ball valve, U-bolt, ring hanger, top roof, motor room and automatic air vent are specified at here. Thank you for downloading the autocad 2D DWG drawing file and other CAD program files from our website.