This code is applicable to the planning, design, construction, acceptance, management and maintenance of civil buildings, industrial buildings and community rainwater utilization projects. This specification does not apply to rainwater utilization projects where rainwater is used as a source of drinking water. It is strictly forbidden to reuse rainwater into the drinking water supply system.
GB 50400-2006 history
2016GB 50400-2016 Technical code for rainwater management and utilization of building and sub-district
2006GB 50400-2006 Engineering technical code for rain utilization in building and sub-district