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1 General Principles2 Terms and Symbols2.1 Terms2.2 Symbols3 Water Supply3.1 Rated water consumption and water pressure3.2 Water quality and water quality pollution protection3.3 System selection3.4 Pipe material, fittings and water meter3.5 Piping layout and pipe laying3.6 Design flow and hydraulic calculation of pipe3.7 Water tower, Water tank, Reservoir3.8 Pressurizing equipment, pump house3.9 Swimming pool and aquatic recreation pool3.10 Cooling tower and circulation cooling water3.11 Waterscape4 Water Drainage4.1 Selection of drainage system4.2 Plumbing fixture and water lock4.3 Pipe location and pipelining4.4 Calculation of drainage pipe4.5 Pipe material, fittings and inspection well4.6 Vent pipe4.7 Sewage pump and catch pit4.8 Small domestic soil disposal4.9 Rainwater5 Hot water and drinking water supply5.1 Rated consumption, temperature and quality of hot water5.2 Selection of hot water supply system5.3 Calculation of heat consumption, hot water quantity and heating equipment hot supply5.4 Water heating and storage5.5 Calculation of network5.6 Pipe, fitting and pipeline laying5.7 Potable water supplyAppendix A Residential district underground pipeline (structure) minimum net clearance between linesAppendix B Valves and screw fittings resistance loss converted length of compensationAppendix C Water supply pipe section Plumbing fixtures water supply equivalent simultaneously outflow probability calculated equation, a c coefficient values tableAppendix D Water supply pipe section designed second flow calculation tableAppendix E Fine drinking water number of taps simultaneously use in the calculated pipe sectionExplanation of wording in this Code