... water tank 1.Customized or design service; 2.Good quality & reasonable price; 3.CCS,DNV,LR,GL,ABS,BV,SGS certified.. fresh water ... certified..Zhonghai Pressure water tank can be classified as drinking water pressure tank, fresh water pressure tank, sea water pressure tank and chemical storing tank.Tank material: Carbon steel ... party certificate: CCS, DNV, ABS, LR, GL, etc.. fresh water pressure tank