| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB 50555-2010 | English | RFQ |
ASK
|
1 days [Need to translate]
|
Standard for water saving design in civil building
| Valid |
GB 50555-2010
|
PDF similar to GB 50555-2010
Basic data | Standard ID | GB 50555-2010 (GB50555-2010) | | Description (Translated English) | Standard for water saving design in civil building | | Sector / Industry | National Standard | | Classification of Chinese Standard | P31 | | Word Count Estimation | 75,790 | | Date of Issue | 2010-05-31 | | Date of Implementation | 2010-12-01 | | Quoted Standard | GB 50015; GB 50242; GB 50336; GB 50400; GB/T 778.1; GB/T 778.2; GB/T 778.3; GB/T 18920; GB/T 18921; CJJ/T 81; CJJ 110; JJG 162; CJ/T 133; CJ 164; CJ/T 224; CJ 266 | | Regulation (derived from) | Ministry of Housing and Urban Notice No. 598 | | Issuing agency(ies) | Ministry of Housing and Urban-Rural Development of the People's Republic of China; General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China | | Summary | This Chinese standard applies to new construction, renovation and expansion of the residential area, public buildings and other civil district saving design, also suitable for industrial buildings, domestic water supply and water-saving designs. | GB 50555-2010: Standard for water saving design in civil building---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
1 General
1.0.1 In order to implement the relevant national laws, regulations and policies, unify the water-saving design standards for civil buildings, improve the utilization rate of water resources, and make the water-saving design meet the requirements of users for water quality, water volume, water pressure and water temperature Safe and applicable, advanced technology, economical and reasonable, guaranteed quality, convenient management, this standard is formulated.
1.0.2 This standard applies to the water-saving design of newly-built, rebuilt and expanded residential quarters, public building areas and other civil buildings, and also applies to the water-saving design of domestic water supply in industrial buildings.
1.0.3 The water-saving design of civil buildings should not only meet the use requirements, but also provide convenient conditions for construction installation, operation management, maintenance inspection and safety protection.
1.0.4 This standard specifies the basic requirements for water-saving design of civil buildings. When this standard conflicts with the provisions of national laws and administrative regulations, it shall be implemented in accordance with the provisions of national laws and administrative regulations.
1.0.5 The water-saving design of civil buildings shall not only comply with this standard, but also comply with the current relevant national standards.
2 Terms and symbols
2.1 Terminology
2.1.1 rated water consumption for water saving
The average daily water consumption after adopting water-saving domestic water appliances.
2.1.2 water consumption for water saving
The water consumption calculated by using the water saving quota.
2.1.3 reversed return layout on the same journey
Corresponding to the arrangement of hot water pipes where the sum of the lengths of the water supply and return water pipes corresponding to each water distribution point is basically equal.
2.1.4 Diversion of tee-union
The TY-type or the downstream tee with deflector inside guides the return water flowing into the circulating return pipe to flow in the same direction.
2.1.5 Return pipe fittings
Utilizing the principle that water has different densities at different temperatures, the water with low temperature moves to the bottom of the pipe, and the water with high temperature moves to the upper part of the pipe to reach the accessories of water circulation.
2.1.6 master circulating pump
The hot water circulation pump installed on the hot water return main pipe in the centralized hot water supply system of the community.
2.1.7 Unit circulating pump
The hot water circulation pump installed on the hot water return pipe of a single building in the centralized hot water supply system of the community.
2.1.8 water productivity
Raw water (generally tap water) is the ratio of the amount of direct drinking water produced by advanced purification treatment to the amount of raw water.
2.1.9 concentrated water rejected water
Raw water (generally tap water) is high-concentration wastewater that is removed in advanced purification treatment.
2.1.10 Sprinkling irrigation
It is a method of using pipelines to send pressurized water to the irrigation area, and disperse it into fine water droplets through the nozzle, and spray it evenly on the green space and tree irrigation.
2.1.11 micro irrigation micro irrigation
Micro-sprinkler irrigation is the abbreviation of micro-water irrigation, which is an irrigation method that transports water and nutrients to the soil surface or soil layer near the lawn and tree roots at a small flow rate.
2.1.12 underground micro irrigation (permeate irrigation)
Underground infiltration irrigation is a form of underground micro-irrigation. Under low pressure conditions, through the sprinkler (microporous infiltration irrigation pipe) buried in the active layer of lawn and tree roots, water is supplied to the soil in a regular and quantitative manner according to the water demand for crop growth. irrigation method.
2.1.13 drip irrigation
An irrigation method that evenly transports water and nutrients dissolved in water to the soil surface or soil layer near the roots of plants at a small flow through the piping system and drippers (irrigators).
2.1.14 nontraditional water source
Water sources different from traditional surface water supply and groundwater supply, including recycled water, rainwater, seawater, etc.
2.1.15 utilization ratio of nontraditional water source
The ratio of annual water supply from non-traditional water sources to total annual water consumption.
2.1.16 water saving system in building
A building water supply system that adopts water-saving quotas, water-saving appliances and corresponding water-saving measures.
2.2 Symbols
2.2.1 Flow, water volume
Qza——annual water consumption for residential domestic water consumption;
Qga——annual water-saving water consumption of public buildings such as dormitories and hotels;
Qra——annual water consumption of domestic hot water;
Wjd——average daily water replenishment of landscape water body;
Wld—the average daily water volume of sprinkler irrigation for greening;
Wtd - the average daily water replenishment of the cooling tower;
Wzd——daily average evaporation of landscape water;
Wsd—infiltration of landscape water body;
Wfd——the water consumption of the computer room of the processing station, etc.;
Wja——annual water consumption of landscape water body;
Wta——annual water consumption for cooling tower replenishment;
Wca—annual flushing water consumption;
∑Qa——the total annual water consumption;
∑Wa——annual consumption of non-traditional water sources;
Wya——the annual rainwater consumption of rainwater;
Wma——annual recovery of reclaimed water;
Qhd—the average daily water consumption of the rainwater reuse system;
Qcd——the daily treatment water volume of the reclaimed water treatment facility;
Qsa—the annual collection volume of raw water in middle water;
Qxa——the annual water demand of the reclaimed water supply pipe network system;
qz——residential water saving quota;
qg—water saving quota for public buildings;
qr——water saving quota for domestic hot water;
ql——watering quota for green irrigation;
qq—cooling circulating water replenishment quota;
qc—the daily water quota for flushing toilets.
2.2.2 Time
Dz—the annual water consumption days of residential domestic water;
Dg—the annual water consumption days of public buildings;
Dr—the number of days of domestic hot water in a year;
Dj—the annual average operation days of the landscape water body;
Dt - the number of days the cooling tower operates each year;
Dc—annual average use days of flushing water;
T——The daily operating time of the cooling tower.
2.2.3 Geometric features and others
nz——the number of residents in a residential building;
ng—the number of people or units of public buildings;
nr—the number or unit number of domestic hot water users;
nc—annual average number of users of toilet flushing water;
Fl - green area;
F—calculate catchment area;
R——Utilization rate of non-traditional water sources;
Ry—rainwater utilization rate;
Ψc—rainfall runoff coefficient;
ha—the annual rainfall thickness;
hd—the annual maximum daily rainfall thickness;
V - the effective volume of the reservoir.
3 Water saving design calculation
3.1 Water saving quota
3.1.1 The water-saving water consumption quota for the average daily domestic water consumption of the residence can be determined according to the provisions of Table 3.1.1 according to the residence type, sanitary equipment setting standards and regional conditions.
Note. 1 Megacities refer to cities with a non-agricultural population of 1 million or more in urban areas and suburbs; large cities refer to cities with a non-agricultural population of 500,000 or more but less than 1 million in urban areas and suburbs; medium and small cities refer to urban areas and cities with a non-agricultural population of less than 500,000 in the suburbs.
2 Area 1 includes. Hubei, Hunan, Jiangxi, Zhejiang, Fujian, Guangdong, Guangxi, Hainan, Shanghai, Jiangsu, Anhui, Chongqing;
The second area includes. Sichuan, Guizhou, Yunnan, Heilongjiang, Jilin, Liaoning, Beijing, Tianjin, Hebei, Shanxi, Henan, Shandong, Ningxia, Shaanxi, areas east of Hetao in Inner Mongolia and east of the Yellow River in Gansu;
The three regions include. Xinjiang, Qinghai, Tibet, the area west of Hetao in Inner Mongolia and the area west of the Yellow River in Gansu.
3.If the local competent authority has regulations on water conservation standards for residential water use, it shall be implemented in accordance with the local regulations.
4 Water quotas for villas include garden greening water and car mop water.
5 The water consumption in the table is the total water consumption. When water supply by quality is adopted, if there is a direct drinking water system, the direct drinking water quota shall be deducted; if there is a miscellaneous water system, the miscellaneous water quota shall be deducted.
3.1.2 The water saving quota of average daily domestic water used in dormitories, hotels and other public buildings can be determined in accordance with the provisions in Table 3.1.2 according to the building type and sanitary equipment setting standards.
Note. 1 Except for the water quotas of nursing homes, nurseries, and kindergartens, which include canteen water, others do not include canteen water.
2 Unless otherwise specified, water consumption for employees is not included, and the water quota for employees is 30L-45L per person and per shift.
3 Medical building water does not include medical water.
4 The water consumption in the table includes the hot water consumption, and the air-conditioning water consumption shall be calculated separately.
5 When selecting water quota, it can be determined according to local climate conditions and water resource status, and a low value should be selected for water-shortage areas.
6 The number of people or units of water users should be calculated on the basis of the annual average.
7 The number of water use days per year should be determined according to the usage.
3.1.3 The water quota for vehicle flushing shall be selected according to the flushing method in accordance with the provisions in Table 3.1.3, and shall be comprehensively determined after considering factors such as vehicle use, road surface grade, and pollution degree. The water used for mopping cars in the parking garage attached to civil buildings can be calculated as 10% to 15% of the car parking spaces.
Note. 1 The number of cars to be washed at the same time is determined by the number of car wash stations.
2 For cars running on cement and asphalt roads, the lower limit value should be selected; when the road surface grade is low, the upper limit value should be selected.
3 Washing a car can be considered as 10 minutes.
4 The hose consumes a lot of water during flushing and is not recommended.
3.1.4 The supplementary water volume of the air-conditioning circulating cooling water system shall be determined according to the meteorological conditions, cooling tower form, water supply quality, water quality treatment, air-conditioning design operating load, operating days, etc., and may be calculated as 1.0% to 2.0% of the average daily circulating water volume.
3.1.5 The water quota for sprinkling roads can be selected according to the properties of the road surface according to the provisions in Table 3.1.5, and should be comprehensively determined after considering meteorological conditions.
Note. 1.The sprinkling water quota for the square can also be selected by referring to this table.
2 The number of watering days per year is determined according to local conditions.
3.1.6 The annual average irrigation quota for watering the lawn and greening can be determined according to the provisions in Table 3.1.6.
3.1.7 The average daily water-saving quota for domestic hot water in residential and public buildings can be determined according to the provisions in Table 3.1.7, and should be based on water temperature, sanitation facilities, hot water supply time, local climate conditions, living habits and water quality. Resources are comprehensively determined.
Note. 1 The temperature of hot water is calculated as 60°C.
2 The water saving quotas listed in this table have been included in the water consumption quotas in Table 3.1.1 and Table 3.1.2.
3 When selecting the water consumption quota for hot water and water conservation in residential buildings, refer to the value of domestic water conservation water consumption quota for the corresponding region, city size and residential type in Table 3.1.1, that is, the small and medium-sized cities in the three districts should take a low value, and the large and medium-sized cities in the first district A city should take a high value.
3.1.8 The water consumption quota for water conservation in civil buildings can be determined according to the sub-item water supply percentages for various buildings stipulated in Article 3.1.1, Article 3.1.2 and Table 3.1.8 of this standard.
3.2 Calculation of annual water consumption
3.2.1 The calculation of annual water consumption for domestic water consumption shall comply with the following regulations.
1 The annual water saving water consumption of residential water shall be calculated according to the following formula.
In the formula. Qza——annual water consumption for residential domestic water consumption (m3/a);
qz—water saving quota, selected according to the provisions of Table 3.1.1 (L/person·d);
nz——the number of residents, calculated as 3 to 5 persons/household, with an occupancy rate of 60% to 80%;
Dz—the number of days of water use in a year (d/a), it is desirable to use Dz=365d/a.
2 The annual water saving water consumption of public buildings such as dormitories and hotels shall be calculated according to the following formula.
In the formula. Qga——annual water saving water consumption of public buildings such as dormitories and hotels (m3/a);
qg——Water saving quota, selected according to the provisions of Table 3.1.2 (L/person d or L/unit number d), if the quota is not directly given in the table, it can be converted by person, time/d, etc. ;
ng——number of users or units, calculated as an annual average;
Dg—the number of days of water use in a year (d/a), determined according to the usage situation.
3 The annual water-saving water consumption for lawn watering, greening water, water replenishment for air-conditioning circulating cooling water system, etc. shall be determined according to Table 3.1.6, Formula (5.1.8) and Formula (5.1.11-2) of this standard respectively.
3.2.2 The annual water consumption of domestic hot water shall be calculated according to the following formula.
In the formula. Qra——annual water consumption of domestic hot water (m3/a);
qr——water consumption quota for hot water saving, selected according to the provisions of Table 3.1.7 (L/person·d or L/unit number·d), if the quota is not directly given in the table, it can be determined by person, time/d, etc. carry out the conversion;
nr——the number of users or units, calculated on the basis of the annual average value, the residence can be calculated according to nz in the formula (3.2.1-1) of this standard;
Dr—the number of days of water use in a year (d/a), determined according to the usage situation.
4 Water saving system design
4.1 General provisions
4.1.1 The "Water-saving Design Special" should be compiled in the preliminary design stage of the building, and the writing format should comply with the provisions of Appendix A. In the calculation of water-saving water consumption, the average daily water consumption quota of water-deficient cities should adopt the standard. low value.
4.1.2 The building water-saving system shall be designed according to the requirements of energy saving, sanitation, safety and local government regulations, and combined with the content of comprehensive utilization of non-traditional water sources.
4.1.3 The water supply, reclaimed water and hot water systems of multi-storey and high-rise buildings where the water supply pressure of the municipal pipe network cannot meet the water supply requirements shall be divided vertically, and the hydrostatic pressure at the lowest water distribution point of sanitary appliances in each zone should not be greater than 0.45MPa, and Decompression facilities shall be installed in the lower part of the partition to ensure that the water supply pressure at each water point is not greater than 0.2MPa.
4.1.4 The greening sprinkler system should optimize allocation and rationally utilize various water resources based on water volume balance and technical and economic comparison.
4.1.5 Municipal tap water and underground well water shall not be used as landscape water sources
4.2 Water supply system
4.2.1 For buildings with municipal or community water supply and reclaimed water supply pipe networks, the domestic water supply system shall make full use of the water pressure of the urban water supply pipe network to directly supply water
4.2.2 Water supply adjustment pools or water tanks, fire-fighting pools or water tanks should be equipped with overflow signal pipes and overflow alarm devices. For buildings with reclaimed water and rainwater reuse water supply systems, waste water and overflow water discharged during cleaning of water supply adjustment pools or water tanks It should be discharged to reclaimed water and rainwater adjustment ponds for recycling.
4.2.3 The hot water supply system shall have measures to ensure the pressure balance of cold and hot water supply at the water point. The pressure difference between cold and hot water supply at the water point should not be greater than 0.02MPa, and should meet the following requirements.
1 The cold water and hot water supply systems should be consistent in different areas;
2 When it is difficult for the cold and hot water system to be consistent, it is advisable to adopt measures such as setting adjustable pressure reducing valves in the water distribution branch pipes to ensure the balance of the cold and hot water pressures in the system;
3 A mixer and a mixing valve with the function of adjusting the pressure difference should be installed at the water point.
4.2.4 The hot water supply system shall be equipped with a circulation system according to the following requirements.
1 The centralized hot water supply system shall adopt mechanical circulation to ensure the hot water circulation in the main pipe, standpipe or main pipe, standpipe and branch pipe;
2 As for the local hot water supply system of shared water heating equipment in apartments, houses and villas with more than 3 bathrooms, natural circulation of water return fittings or mechanical circulation of circulating pumps shall be provided;
3 For the circulation system that centrally supplies hot water throughout the day, it shall ensure that the temperature of the outlet water at the water distribution point is not lower than 45°C, and it shall not exceed 15s for residential buildings, and shall not exceed 10s for public buildings such as hospitals and hotels.
4.2.5 The layout of the circulation pipeline shall ensure the circulation effect and shall comply with the following regulations.
1 The circulation pipes of a single building should be arranged in the same way, the hot water return dry, the standpipe should be connected by a diversion tee, and the return water standpipe should be equipped with a flow-limiting regulating valve, a temperature control valve and other measures to ensure the circulation effect;
2 When the layout of hot water distribution branch pipes is too long and cannot meet the requirements of Item 3 of Article 4.2.4 of this standard, it is advisable to set up branch pipe circulation, or adopt branch pipe automatic control electric heating measures;
3 When the pressure reducing valve is used to supply water in different areas, the hot water circulation in each area should be ensured;
4 The centralized hot water supply system of the residential area shall be equipped with a main hot water return pipe and a general circulation pump. The return pipe connecting the main return water pipe of the individual building to the residential area should be provided with a diversion tee, a flow-limiting regulating valve, a temperature control valve or The sub-circulation pump ensures the circulation effect;
5 When adopting the centralized hot water supply system in which the hot water storage tank supplies water through the hot water pressurized pump, the circulation pump can be used together with the hot water pressurized pump, and the speed regulating pump group is used for water supply and circulation. The return water main pipe is equipped with a temperature control valve or a flow control valve to control the return water flow.
4.2.6 The centralized hot water supply system of public bathrooms shall meet the following requirements.
1 Large public bathrooms should adopt high-level cold and hot water tanks for gravity flow water supply. When high-level cold and hot water tanks are unconditionally installed, water heating equipment with a heat storage adjustment volume can be provided to supply hot water through a mixing thermostatic tank and a thermostatic valve. When the water is directly supplied from the hot water tank through the booster pump, there should be measures to ensure the balance and stability of the system's cold and hot water pressure;
2 For small public bathrooms and shower rooms with 3 or more showers in the building with centralized hot water supply system, the hot water supply branch pipe should not be branched for other water supply;
3 The pipelines in the bathroom shall be arranged according to the following requirements.
1) When the water outlet temperature of the shower can be guaranteed to be controlled within the operating temperature range, a single-pipe water supply should be used; when it cannot be satisfied, a double-pipe water supply should be used;
2) The water distribution pipes of more than 3 showers should be arranged in a ring;
3) It is not suitable to take over the ring water supply pipe to supply water for other appliances;
4) The hot water pipe network in the public bathroom should be equipped with a circulation return pipe, and the circulation pipe should adopt mechanical circulation;
4 The shower should adopt instant opening and closing pedal, manual control or induction automatic control device.
4.2.7 The direct drinking water system of building pipelines shall meet the following requirements.
1 The design requirements for the vertical division of the direct drinking water system, the setting of the circulation pipe, and the length of the branch pipe from the water supply standpipe to the water point shall be implemented in accordance with the current national industry standard "Technical Regulations for the Direct Drinking Water System of the Pipeline" CJJ 110;
2 The water production rate of the purified water equipment of the pipeline direct drinking water system shall not be lower than 70% of the raw water, and the concentrated water shall be recycled.
4.2.8 When using steam to prepare boiled water, indirect heating should be used, and condensed water should be recycled.
4.3 Circulating water system
4.3.1 The design of cooling tower water circulation system shall meet the following requirements.
1 The water source of circulating cooling water should meet the water quality and water quantity requirements of the system, and non-traditional water sources such as rainwater should be used first;
2 Cooling water should be recycled;
3 When multiple cooling towers are used at the same time, it is advisable to set up water balance facilities such as water collecting pan connecting pipes;
4 The water quality stabilization treatment of the circulating cooling water of the building air-conditioning system should be combined with the water quality, and the treatment method and equipment should be reasonably selected, and the cooling water circulation rate should not be lower than 98%.
5 The volume of side stream treatment water can be calculated separately based on the removal of suspended solids or dissolved solids. When filtering is used to remove suspended solids, the filtered water volume should be 1% to 5% of the circulating water volume of cooling water;
6 Valves and metering devices should be installed on the cooling tower make-up water main pipe;
7 An overflow signal should be installed in the sump, pan or make-up pool, and the signal should be sent to the machine room.
4.3.2 The design of water circulation systems such as swimming pools and water recreation pools shall meet the following requirements.
1 Swimming pools, water entertainment pools, etc. should adopt circulating water supply systems;
2 The drainage of water circulation systems such as swimming pools and water entertainment pools should be reused.
4.3.3 Steam condensed water should be recovered and reused or recycled, and should not be discharged directly.
4.3.4 Car washes should adopt anhydrous car washing and micro-water car washing technology. When micro-water car washing is used, the design of the car washing water system should meet the following requirements.
1 Non-traditional water sources should be used preferentially in commercial car washes or car washes;
2 When washing the car with tap water, the car wash water should be recycled;
3 Motor vehicle cleaning equipment shall comply with the relevant national standards.
4.3.5 The collection and reuse of air-conditioning condensate shall meet the following requirements.
1 For buildings equipped with reclaimed water and rainwater reuse water supply systems, the condensed water in the central air-conditioning part should be recycled and collected into reclaimed water and rainwater clear water tanks as miscellaneous water;
2 For buildings equipped with centralized air-conditioning systems, when there is no reclaimed water and rainwater reuse water supply system, a separate air-conditioning condensate recovery system can be installed to use it for water features, greening, etc.
4.3.6 Water for water source heat pumps should be recycled and should meet the following requirements.
1 When groundwater and surface water are used as the heat source of the water source heat pump, the water resource demonstration of the construction project shall be carried out;
2 The groundwater after heat exchange by the water source heat pump using groundwater as the heat source should be completely recharged to the same aquifer, and the water volume of the pumping and filling wells should be able to be monitored online.
4.4 Watering system
4.4.1 The water source of the sprinkler system shall meet the following requirements.
1 Non-traditional water sources such as rainwater and reclaimed water should be selected first;
2 The water quality shall comply with the provisions of the current national standards GB/T 18921 "Water Quality of Urban Sewage Reuse for Landscape Environment" and "Water Quality of Urban Miscellaneous Water for Reuse of Urban Sewage" GB/T 18920.
4.4.2 High-efficiency water-saving irrigation methods such as sprinkler irrigation and micro-irrigation should be used for greening watering. Different types of sprinkler irrigation systems should be selected according to factors such as the sprinkler irrigation management form, topography, local meteorological conditions, water source conditions, green area size, soil permeability, plant type and water pressure, and should meet the following requirements.
1 When reclaimed water is used for watering the green space, micro-irrigation should be used as the main watering method;
2 For green spaces with frequent personnel activities, micro-sprinkler irrigation should be used as the main watering method;
3 For the green space where the soil is easy to harden, it is not suitable to use underground seepage irrigation;
4 Trees, shrubs and flowers should be watered mainly by drip irrigation and micro-spray irrigation;
5 For the parking lot with greenery, the irrigation method should be selected according to the provisions in Table 4.4.2-1;
6 The irrigation method for platform greening should be selected according to the provisions in Table 4.4.2-2.
4.4.3 The sprinkler system should use a humidity sensor to automatically control its start and stop.
4.4.4 The pressure difference between any two nozzles on the branch pipe of the sprinkler system should not exceed 20% of the design working pressure of the nozzles.
5 Use of non-traditional water sources
5.1 General provisions
5.1.1 The water-saving design shall take measures according to local conditions, make use of rainwater, reclaimed water, seawater and other non-traditional water sources, reasonably determine the water quality indicators, and shall comply with the current relevant national standards.
5.1.2 When non-traditional water sources are used in civil buildings, the quality of the daily water supply at the water terminal must be guaranteed to be safe and reliable, and negative impacts on human health and indoor sanitation are strictly prohibited.
5.1.3 The water quality treatment process of non-traditional water sources shall be determined according to the characteristics of source water, pollutants and water quality requirements of effluent.
5.1.4 Rainwater and reclaimed water utilization projects should be designed in accordance with the relevant provisions of the current national standards "Technical Specifications for Rainwater Utilization Engineering in Buildings and Residential Areas" GB 50400 and "Code for Design of Reclaimed Water in Buildings" GB 50336.
5.1.5 Non-traditional water sources such as rainwater and reclaimed water can be used for landscape water, green water, car washing water, road surface washing water, toilet flushing water, fire water and other domestic water that does not come into contact with the human body. Rainwater can also be used for building air conditioners Water replenishment for circulating cooling systems.
5.1.6 Reclaimed water and rainwater shall not be used for domestic drinking water and swimming pool water. Reclaimed water or urban sewage reclaimed water should not be used for landscape and recreational water that is in contact with the human body.
5.1.7 Landscape...
|