e-tender for annual repair and maintenance contract amc of manifold room and central medical gas pipeline system , rates of amc ( annual maintenance contract ) , oxygen ( o2 ) gas pipeline system with alarm , nitrous oxide ( n2o ) gas pipeline system with alarm , vacuum gas pipeline systema ) control panelb ) oxygen bank assembly , central vacuum pipeline & system , rates of spares ( most commonly used ) , copper pipe 12 mm -one meter , copper pipe 15 mm -one meter , copper pipe 22mm -one meter , outlet shudder complete for o2 , outlet shudder complete for vac , bpc flow meter 0-15 lpm w/o humidifier bottle , bottle humidifier w/cap , adapter pipe line bpc flow meter , unit ward vacuum with 600ml collection jar , plug safety keyed vac , tube for suction lp local/ meter , ball valve for 15mm copper pipe , ball valve for 22mm copper pipe , valve self sealing for o2 , hp non-compressed tube for n2o , o2 , vacuum per meter , dissc connector