【Direct Drinking Water System】

1. Pipe network design and requirements of the general provisions of
 1.The pipeline system must be independent of setting, shall not directly connected to building water supply system,
 2.The pipeline system for interior and exterior of buildings, back to the type of water distribution network should be based on the overall planning and building construction nature, scale and height to pipe network maintenance and safe operation of such conditions determined.
 3.In order to ensure the water quality within the pipe network for water circulation pipe system should be back to set the loop tube, for, back to the water distribution network should be designed for the same program.
 4.The circulation flow rate falls within "building water supply and drainage design"GB50015-2003
 The relevant provisions of the cycle of not more than 12h, in which time the cycle time of not more than 4h, full-cycle time of less than 12h.

Table 1 cycle pipe network system for the return type