Regarding the problem of "toilet clogging causes cancer", Li said that there is still no exact research data, and its toxic effect on human body is related to dose, so it is not necessary to be too nervous.
The main components of toilet cleaner are surfactants or adhesives such as alkyl sulfonate and polyvinyl alcohol, which are often used in cleaning products such as soap and belong to external use. If ingested for a long time, it may cause chronic poisoning. It is suggested that families with single water supply system should try not to put toilet cleaning blocks in the water tank, and can choose bottled toilet cleaning liquid for cleaning.
Extended data
Shenyang Water Group said that some users reported that the tap water released from the faucet in their home suddenly turned blue in a short time and the color was different. After testing, it was found that in order to keep the sanitary ware clean, upstairs users placed toilet blocks in the toilet water tank, and the toilet blocks dissolved in water and turned into blue liquid. When the water pressure is unstable or the water supply is stopped, the water in the water tank flows back into the tap water.
In general, under the pressure of pipe network, the flow direction of water is positive. Even if water is not used, because of the pressure in the pipeline, the pressure rod in the water tank will automatically crush the valve when the water is full, and the water in the toilet tank will not enter the pipeline.
The relevant staff of Shenyang Water Group explained that the main reason lies in the toilet tank.
When water is stopped or used downstairs, if there is no one-way valve installed in the water inlet pipe of the toilet tank or the quality of the one-way valve has long-term problems, at the moment of opening the valve or faucet, due to the sudden change of water flow, a very small instantaneous negative pressure is generated in the unused pipeline upstairs, which will pump the water in the tank into the pipeline.
Negative pressure is related to the amount of water when it is turned on, so the phenomenon of "blue water" in tap water is instantaneous, uncertain and irregular for some users.
People's Daily Online-Will putting toilet blocks in toilets cause cancer? Rumors!
People's Daily Online-It is true that putting toilet blocks in the toilet tank will pollute tap water.