In the design of cold and hot water supply system in a high rise hospital building with 888 beds,a whole closed energy-saving and water-saving system was designed for supplying hot water with anti-Legionnella electric water heaters.The system applied the high service head of a roof cold water tank,quasi-full-time hot water supply manner,large volumetric and very low pressurized electric water heaters,return water pumps with large connection diameter and low head,return water diverted tees,pressure reduction...