Introduction to the faucet may appear bubble water causes and measures

 Many users found in the home tap out of tap water appears milky white, like milk, we thought it was added to what agents lead to, I would like to explain to you, before many water plant disinfection of clean water pools used to add bleach as a disinfectant, due to the strong alkalinity of bleach reduces the surface tension of the water so that blisters are easy to produce, and bleach also enhances the stability of the blisters so that blisters are not easy to disappear. Now most of the water plant disinfection are used chlorine dioxide and sodium hypochlorite for sterilization. So the formation of milk water can be said for sure is not caused by the agent. Below I analyze the reasons for white bubbly water in the faucet according to my personal opinion: if there is a different understanding of the welcome to communicate and explore.

I. Physical phenomena

1. Pressure changes lead to gas precipitation: in the tap water delivery process, the water is pressurized by the pump and other operations, so that the pressure in the pipe network rises, the solubility of the gas in the water at this time increased, a large number of gases dissolved in the water. When the water from the pipe network out to the faucet and other users, the pressure is suddenly reduced, according to Henry's law, the solubility of the gas with the pressure decreases and decreases, the original gas molecules dissolved in the water by the disappearance of the pressure, it is rapidly expanding the formation of tiny bubbles, so that the water is white, it looks like a large amount of white powder, and it will gradually disappear after a moment of rest.
2. Changes in water velocity cyclone: in some parts of the pipeline, such as elbows, valves or pumps, etc., due to sudden changes in the speed or direction of the water flow changes, will produce a local pressure drop. When the pressure drops below the saturation vapor pressure of water, dissolved in the water gas will quickly escape to form bubbles. These bubbles may clump together to form larger cyclones, resulting in white bubbles in the water.

II. Equipment factors
1. The role of activated carbon cartridge: if the network connected to the drinking water equipment using activated carbon cartridge, due to the dense pore size of the activated carbon surface, the filtration process will release a large number of small bubbles, making the water appear white bubbles.
2. The impact of new equipment or cartridges: the newly installed water purifier or just replaced the cartridge internal air, when the water flow through, the air in the aperture of the cartridge will be squeezed out, forming white foam and bubbles.
In addition, the cartridge will usually be moisturized with a protective solution at the factory, the filter membrane in order to ensure water permeability needs to be used hydrophilic modifiers, general hydrophilic agents have certain amphiphilic properties, which is conducive to the generation and stabilization of the foam, so in the initial use or replacement of the cartridge for a period of time after the water may appear white foam.

III. Pipeline maintenance problems
Influence of pipeline maintenance: When the pipeline network undergoes maintenance and other operations, it may cause some air to enter the pipeline. This air dissolves in the water under pressure, forming tiny bubbles that make the water look white.

IV. The role of the exhaust valve and the impact of the failure of the bubbly water
1. Discharge of gas: the main function of the exhaust valve is to remove the gas gathered in the pipe network. When there is air in the water supply pipeline, the gas will gather in the upper part of the exhaust valve, causing the float to drop with the water level, thus opening the exhaust piston and closing it after exhausting the gas. This prevents the gas from accumulating in the pipe network, avoids the problems of unstable water flow and increased head loss caused by too much gas, and laterally helps to reduce the possibility of white bubbly water.
2. Protect the safety of the pipeline network: in the event of a sudden power outage, stop the pump, etc., there may be negative pressure in the pipeline caused by pipeline vibration or rupture, the exhaust valve at any time to exhaust to ensure the safety of the pipeline. This is not directly related to the white bubbly water, but to protect the overall normal operation of the pipeline network, indirectly on the stability of water quality has played a positive role.
3. Failure of the exhaust valve: If the exhaust valve itself fails, such as the exhaust port is blocked, the float is out of order, etc., it may result in the gas not being able to be discharged smoothly, which will cause the gas to accumulate in the pipeline network. When this gas mixes with water, white bubbly water may form. For example, the exhaust port is blocked by impurities, the gas can not be discharged, with the flow of water, the gas will be dispersed in the water to form bubbles.
4. Installation location is unreasonable: If the exhaust valve is not installed in the right location, not installed in the pipeline network is easy to accumulate gas at the highest point or closed gas, you can not effectively discharge the gas. So that the gas may accumulate locally, when the water flow through, the gas will be mixed into the water, resulting in the phenomenon of white bubbly water. For example, in the middle part of some long-distance horizontal pipelines, if the exhaust valve is not reasonably set up, this situation is likely to occur.

V. How to effectively avoid bubbling water measures
1. Optimize the pipeline design and reasonable layout: avoid high points in the pipeline, and set up automatic exhaust valves at the high points if necessary. Slope design: Ensure that the pipeline is inclined to the exhaust point to promote the natural gathering and discharge of gas.
2. Reasonable installation of automatic exhaust valves and composite exhaust valves: install them at intervals in high points, elbows and long straight sections of the pipeline, with high-velocity exhaust and micro-exhaust functions to adapt to different working conditions.
3. Control pressure and water flow to increase the slow-closing valve / water hammer eliminator: to prevent sudden pressure drops and water hammer effect, reduce gas precipitation.
4. Stabilize pump operation: avoid frequent starting and stopping, use frequency conversion pump to maintain constant pressure to avoid cyclone.
5. Check the sealing of water pump: Maintain the water pump regularly to ensure that no air is sucked in. Ensure that there is enough water in the inlet of the pump to flood the inlet pipe to prevent vortex from carrying air.
6. Regularly maintain the exhaust valve: prevent impurities from clogging and affecting the exhaust efficiency, and replace it in time if it is damaged. If found that the original design of the installation of exhaust valve location is not reasonable can also be added to the exhaust valve.

   VI. Actual case reference

Case 1: a city water supply system due to frequent water hammer caused by bubbles, the installation of slow-closing valve pressure fluctuations to reduce the bubble phenomenon disappeared.
Case 2: mountain pipe network due to improper design of the slope of the gas accumulation, through the addition of composite exhaust valve and adjust the slope of the pipeline, effectively discharged gas.
    
 In short, white bubbly water in the network for a variety of reasons, including physical phenomena such as pressure changes and changes in water flow rate caused by gas precipitation and cyclone generation, but also equipment factors such as the role of activated carbon cartridges as well as new equipment or cartridges within the air and the impact of the protection of the liquid, but also may involve maintenance issues such as pipeline repairs to introduce air as well as secondary water supply tanks cast bleach produced substances. Understanding these causes can help to better combat and manage white bubbly water in pipe networks. The prevention and control of bubbling water in pipe networks requires a multi-dimensional approach that combines design, equipment and operation with measures such as automatic venting, pressure control and water quality treatment, with regular maintenance and monitoring being key. Regular maintenance and monitoring are key. Tailored solutions for different causes can significantly improve the stability of the water supply system.