I’ve been drinking tap water all my life and I have to wonder: Tap water pipes have a lifespan of 50 years, without any regular cleaning and maintenance. I have to clean my aquarium every week and even after cleaning it I wouldn’t drink from it. I know light and air play it’s role, but still, 50 years? Is the inside of the pipes really staying that clean or is it that the dirt in there doesn’t really bother us?
In: Engineering
Most water systems are required to implement corrosion control. Use of a phosphate chemical that both coat and sequester metals in the water. Ph/alkalinity are also implemented. Biofilms are generally not wanted and a problem in the summer months. Hydraulic swings in flow can cause slothing away. Also can cause a big chlorine demand but im no expert on biofilms. Will read the other post on how its good in drinking water. Contrary to believe that water is always moving it really depends where your tap is. We have night time flushers that go around at night and open up hydrants in the “dead” spots. We also are constantly testing the chlorine residual in the tanks and will take them out of service and shock treat the tank with high free chlorine to reduce the biofilm. Each system is different and has its own unique chemistry. Any change has to be taken very seriously. Like Flint they changed source water and I dont believe they used any phosphate for corrosion control. Google langelier index corrosivity. Also, I work at a treatment plant but am no expert on the distribution system.
water in pipes (not in your house) are constantly moving which makes buildup more difficult. the water is treated and kept a specific ph. a bit of mineral deposit is acutally good and is why lead pipes are still in use. slight mineral build-up acts as a barrier between the water and the pipes and lead pipes generally aren’t an issue. the issue arise when the pipe is “too clean”. the mineral deposit being dissolved or physically break off would reveal the lead pipes leading to the health issues of lead.
the impurities in water is why its conductive. distilled water (water with no impurities) does not conduct electricity
There has been research that indicates that the “disgusting” biofilms that line the inside of water pipes actually purify the water.
https://www.wateronline.com/doc/biofilm-may-help-purify-water-0001
>“Our drinking water is to a large extent purified by millions of ‘good bacteria’ found in water pipes and purification plants, Swedish researchers have found. So far, the knowledge about them has been practically non-existent, but this new research is about to change that,” according to Lund University in Sweden.
>Researchers at the university “discovered that bacteria and other microbes are found in the form of a thin, sticky coating in drinking water treatment plants and on the inside of water pipes. Known as a ‘biofilm,’ the coating is inescapable because every surface involved in the process of getting drinking water to your tap is covered in it,” RT recently reported.
If you think about it, it makes sense. Biofilms are communities of microorganisms that cluster together and stick to the pipes, for them to live, they need to feed, and pure water isn’t particularly nutritious, so they would surely be pulling stuff out of the water to feed on it.
Sorry to burst your bubble dude, but they don’t stay clean. Just google “inside of water pipe” and be prepared for some horrification.
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