Social News
Written by: Ouyang Dehao
2020-12-28 17:35
Last update date: 2020-12-28 17:36
The fourth wave of the new crown pneumonia epidemic in Hong Kong continued. An outbreak occurred in Choiyun Village, Tszyunshan. The Hong Kong University team found that sewage was positive for the virus in Fengze Building, Choiyun Village for 5 consecutive days.
He Juye, chairman of the Building Policy Group of the Institute of Surveyors, said today (28th) that the wrong connection, deformation and damage of the pipes, and the lack of water in the U-shaped traps will cause odors and spread the virus.
He emphasized that residents need to inject water every day to "protect themselves", otherwise the sewage with the virus will flow into the room due to air pressure.
After He Juye inspected the pipes at Fengze Building this afternoon, he pointed out that the virus was found in the manhole of the building, which meant that the sewage with the virus was discharged from the pipes of the unit, and he believed that there was a theoretical risk of spreading the virus.
Many households told reporters today that the pipes have long been smelly in recent years.
He responded that wrong connection of pipes, deformation and damage, lack of water in the U-shaped trachea, etc., will cause odors to spread and have the opportunity to spread the virus.
He Juye pointed out that the wrong connection, deformation and damage of the pipes, and the lack of water in the U-shaped traps can cause odors.
(Photo by Ou Jiale)
He suggested that residents should check the pipes for leakage or deformation.
He also emphasized that because the floor drainage pipes span several units, and the sewage pipes also lead from top to bottom to the manhole, each pipe is separated by a U-shaped trap, so residents need to inject water every day to "self-protect". In order to maintain the water seal of the U-shaped trap, otherwise the sewage with the virus will flow into the pipe due to the air pressure, and the air with the virus will pass into the room.
"If the virus has a certain concentration, flushing the toilet will definitely not wash away the sun immediately. If there is no water (U-shaped trap), the air pressure will fall into the house."
In addition, residents should pay attention to whether there is water seepage on the ceiling, which means that the pipes upstairs are broken, and the sewage with the virus will leak to the lower floors.
He also mentioned another way of virus transmission. If the amount of virus in the manhole is high, its hydrosol may spread upward along the pipe to the roof and be discharged. When conditions such as wind direction and wind speed are met, a turbulence effect is formed. Gas will also enter high-rise households.
He Juye pointed out that residents need to inject water every day to "self-protect" to maintain the water seal of the U-shaped trap.
(Photo by Ou Jiale)
He also pointed out that Fengze Building is a two-tower design, which is a common architectural style in Hong Kong and uses the same sewage system as common buildings.
However, he believes that since Feng Chak House is located at the highest location in Choi Wan Village and is far away from buildings such as Ming Li House, it is estimated that separate manholes and tail wells will be used, so it will not spread to other buildings through pipes.
But Ho said frankly that although sewage inspection can indeed help identify potential infected buildings, long-term and continuous monitoring is required. He believes that there are many housing estates in Hong Kong and large-scale testing is difficult.
"It is a good idea to sample and test buildings at risk, but how many problems are there?"
▼The severe social distancing measures of the epidemic will continue until January 6▼
+9
+9
+9
New crown pneumonia | Fengzelou Mutual Committee: The government has found it inappropriate to repair pipes for days and urges residents not to evacuate
No confirmed case. Sewage samples from Fung Chak House, Choi Wan Village, No. 4, were positive for the virus. All buildings must be checked
New crown pneumonia | Vietnam illegal immigrants confirmed in the second test 6 detainees must be quarantined
01News
Mandatory testing for new coronary pneumonia
