Chinese people *** and the State Ministry of Health Health Supervision Center clearly issued: the supervision and management of drinking water sanitation, in which Article 21 clearly points out that: all the Ministry of Health involved in the issuance of health permits approved products belong to the 'driving without a license', is not protected by law.
These are the most important of all.
Two: Selection of materials
Pressure and corrosion resistance to stainless steel is the best. The price is also relatively high. Food pole resin or PVC is less resistant to pressure, the price is also lower.
Pressure resistance of the material is good, can be used as a pre-filter (central machine). Compression resistance of the material is relatively poor, can only be used in the pre-filter (centralized) at the back end, used as a drinking machine.
Two: the function.
Choose a water processor to first clarify their purpose, first of all, from the general concept of water purification or water softening.
Purification of water is to remove sediment, impurities, bacteria, heavy metals, residual chlorine, organic matter, and some minerals.
Water softening is to remove calcium and magnesium ions in the water, the most direct that is scale.
General water softening only need to use cationic resin can complete the ion exchange, remove calcium and magnesium ions. Softened water has the advantage of cleaning the skin, washing clothes soft and smooth, protecting the water heater and faucet, shower is not blocked by scale, and the sink is no longer water stains.
But it is important to note that it is because it removes calcium and magnesium from the water, long-term consumption of softened water can cause the body to lack of calcium and magnesium.
Therefore, in addition to the water hardness to reach the very hard and very hard standards, should use the water softener as a drinking water processor. Water softeners as a living water processor is a wise choice.