First, is the secondary water supply at the top clean?
1. Whether the secondary water supply of high-rise buildings is clean depends first on the type of secondary water supply equipment and management system used by users. Generally speaking, according to the national Hygienic Standard for Secondary Water Supply Facilities, secondary water supply equipment should be cleaned and disinfected regularly. If the regulations are strictly implemented, the secondary water supply at the top floor is still clean and can meet the drinking water standard, so you don't have to worry too much about the cleanliness of the water supply.
2. If the secondary water supply and the water quality of the corresponding pipes pass the standards, coupled with strict management and implementation in the later period, the secondary water supply of high-rise buildings can be guaranteed to be clean and meet the drinking water standards, and there is no need to worry too much about the health hazards caused by the secondary water supply. However, if you want to make the secondary water supply clean, it is recommended to install a tap water filter at home.
3. In some cases, the secondary water supply of high-rise buildings will be unclean, mainly because the materials of booster pumps and pipeline valves of water supply equipment generally require food hygiene grade 304 stainless steel as the standard to meet the hygiene standards; If ordinary steel pipes are used in water pipelines, the interior will be seriously corroded and the water source will be polluted; The pollution of water storage is the pollution in secondary water supply, which is mainly caused by the material and unsealed water tank, resulting in other dust, insects and other pollution; The later management is mainly to disinfect and clean the water tank regularly.
Second, the high-rise secondary water supply from which floor?
1. According to the regulations of our country, the water supply is guaranteed to be six floors, and the pressure of municipal water distribution (tap water) pipe network is only guaranteed to be below six floors, and more than seven floors (including seven floors) need secondary pressurized water supply. So the secondary water supply of high-rise buildings starts from the seventh floor.
2. The stipulation in the Code for Design of Outdoor Water Supply (GB500 13-2006) in China is to ensure the water supply of six floors, that is to say, the pressure of municipal water distribution (tap water) pipe network is only guaranteed to be below six floors (including six floors), so the water supply of more than seven floors (including seven floors) must be pressurized twice.
2, the general municipal tap water pressure is about 0.3mpa, which is 30 meters water column. But excluding the loss of water (pressure loss caused by pipeline turning and passing through valves and water meters), only about 0.25-0.28 MPa actually enters the building, and the top water pressure should be 0.1MPa; . Also consider the pressure fluctuation of municipal pipe network; Multiply by a simultaneous coefficient. The reason why high-rise secondary water supply is adopted is that the higher the floor, the smaller the water pressure, and other methods must be adopted to ensure normal water use, so high-rise secondary water supply is essential.
Third, the high-rise secondary water supply charges
1. The charging standards vary from place to place. The charging standard of secondary water supply for high-rise buildings is the same as that for ordinary water supply. Usually, the secondary water supply fee is not added, and the water fee paid includes the secondary water supply fee.
2, the current high-rise secondary water supply charges are divided into two types:
(1) One is that the high-rise residential quarters hand over the expenses of secondary water supply equipment, daily cleaning expenses and water charges to the municipal water supply company, which is responsible for the collection and management;
(2) The other is that the property collects and pays the secondary water supply fee. In the second case, the secondary water supply of most high-rise residential buildings adopts the "master meter system". A high-rise residential building in a residential area has only one master meter installed by a water supply company, and each household's sub-meter is purchased and installed by the developer. When the water company collects water charges on a monthly basis, it only copies the summary table and bills, and the water charges of each household are copied by the property company.
3, the national water fee collection standards are as follows:
(1) Domestic water consumption of residents: 2.80 yuan/m3;
(2) Administrative water consumption: 3.90 yuan/m3;
(3) Industrial and commercial water consumption: 4. 10 yuan/m3;
(4) Water for hotels, restaurants and restaurants. : 4.60 yuan/m3;
(5) Water consumption of bathing industry: 60 yuan/m3;
(6) Water consumption for car washing and purified water: 40 yuan/m3;
(7) Compensation for agricultural water use: 0.60 yuan /m3.
(The above fees come from the Internet for reference only)
The above is about
Is the high-rise secondary water supply clean? What floor does the secondary water supply for high-rise buildings start from? I hope I can help you!