Article 4.4.5 of the new general code for water supply, drainage and water saving in buildings (08) domestic drainage pumps shall be equipped with standby pumps, and anti backflow measures shall be taken on the outlet pipeline of each pump.
Water saving design standard for old civil buildings gb50555-20104.4.2 sprinkler irrigation, micro irrigation and other high-efficiency water-saving irrigation methods shall be adopted for greening sprinkling.
The outlet time when the outlet temperature of hot water distribution points in residential buildings reaches the minimum outlet temperature shall not be greater than 15s respectively, and the outlet temperature of water distribution points in public buildings shall not be greater than 10s.
Water supply pipelines shall be blue rings; 2.
8.1.9 of the new general code for water supply, drainage and water saving in buildings, water supply, drainage, reclaimed water, rainwater reuse and seawater utilization pipelines shall have different identifications and shall comply with the following provisions: 1.
The old standard for design of building water supply and drainage gb50015-20193.13.15 the outdoor water supply network of the community directly supplied by the urban pipe network shall be arranged into a ring network, or connected with the urban water supply pipe into a ring network.
Article 4.5.1 of the new general code for water supply, drainage and water saving in buildings ， roof rainwater shall be discharged in an organized manner.
There was no mandatory requirement in the old.
Article 4.4.1 of the new general code for water supply, drainage and water saving in buildings 4.4.1 when the indoor ground of the building is lower than the outdoor ground, a drainage sump, drainage pump or finished drainage lifting device shall be set to drain domestic drainage, and ensure the safe and reliable discharge of sewage and wastewater.
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In article 4.5.5 of the new general code for water supply, drainage and water saving in buildings, waterproof measures shall be taken at the connection between rainwater bucket and gutter and eaves gutter.
The time for the hot water distribution point to ensure that the outlet water temperature is not lower than 45 ℃, the time for residential buildings shall not be greater than 15s, and the time for public buildings shall not be greater than 10s; Article 5.2.3 of the new general code for water supply, drainage and water saving in buildings ― sterilization measures shall be taken for the centralized hot water supply system.
4.5.7 when the roof rainwater pipeline of buildings with a height of more than 100m is connected to the outdoor inspection well, the inspection well wall shall have sufficient strength to withstand rainwater scouring, and the well cover shall be able to overflow rainwater.
The old specification does not have this mandatory item.
Article 3.4.8 of the new general code for water supply and drainage and water saving in buildings (05): efficient water-saving irrigation shall be adopted for greening sprinkling.
When the drainage pipe of a high-rise building greater than 100m discharges to the outside, the water shall be discharged to the outdoor inspection well, and silencing measures shall be taken.
3.2.3 the main pipes of outdoor water supply network shall be arranged in a ring in the new general code for water supply, drainage and water saving in buildings.
According to 4.3.1 of the new general code for building water supply, drainage and water saving, the following building drainage shall be provided with a separate drainage system: 1.
According to Article 9.8 of the old design standard for building water supply and drainage gb50015-20193, the outlet pipe of each water pump shall be equipped with a pressure gauge, maintenance valve, check valve or multi-functional control valve of the water pump.
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Article 5.1.3 of the new general code for water supply, drainage and water saving in buildings ― the centralized hot water supply system shall be equipped with a hot water circulation system.
According to 3.3.3 of the new general code for water supply, drainage and water saving in buildings, measures to eliminate the harm of water hammer shall be taken for the pipeline of water supply pump house where water hammer may occur.
According to Article 8.6 of the old standard for design of building water supply and drainage (gb50015-20194), the setting of domestic drainage pumps in the basement of buildings shall comply with the following provisions: 1.
Reclaimed water pipeline, rainwater reuse and seawater utilization pipeline shall be light green ring; 4 drainage pipes shall be yellow brown rings.
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According to Article 8.1 of the old standard for design of building water supply and drainage gb50015-20194, when the indoor ground of a building is lower than the outdoor ground, a sewage sump, sewage pump or finished sewage lifting device shall be set.
The hot water supply pipe shall be yellow ring, and the hot water return pipe shall be brown ring; 3.
When the outlet water temperature of the water heating equipment of the centralized hot water supply system cannot meet the requirements of article 6.2.6 of this standard, the facilities for eliminating pathogenic bacteria or measures for eliminating pathogenic bacteria shall be set up.
03 new general code for building water supply, drainage and water saving 3.3.5 domestic and drinking water tank room The feed water pump room shall be equipped with technical and physical prevention, security and monitoring measures such as intrusion alarm system, which is not mandatory in the old and original specifications.
The old technical specification for roof rainwater drainage system of buildings cjj142-20143.4.14 when the rainwater pipe of high-rise buildings discharges to the apron or apron, anti scouring measures shall be taken.
Oily wastewater in the kitchen of staff dining room and business restaurant is not mandatory in the old code.
According to the water saving design standard for old civil buildings gb50555-20104.1.5, municipal tap water and underground well water shall not be used as the water source of landscape water.
There shall be no less than 2 connecting pipes between annular water supply network and urban water supply pipe.
A standby pump shall be set for the drainage pump in the domestic drainage sump; 2 when sewage lifting device is used, single pump or double pump sewage lifting device shall be selected according to the use situation.
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Article 3.4.3 of the new general code for water supply, drainage and water saving in buildings 3.4.3 – municipal tap water and underground well water shall not be used as the water source of non hydrophilic outdoor landscape water.
If necessary, a water hammer elimination device can be set on the outlet manifold of several water pumps.
The old technical specification for roof rainwater drainage system of buildings cjj142-20144.1.5 waterproof measures shall be taken at the connection between rainwater bucket and gutter and side ditch.
10.
According to Article 3.10 of the old design standard for building water supply and drainage (gb50015-20196), the centralized hot water supply system shall be equipped with a hot water circulation system, which shall comply with the following provisions: 1.
