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The Importance Of Chlorinating New Lay Water Mains.

Author : Daevid Ribbledale

When it comes to potable mains drinking water the most critical risk for people are pathogens that are present in the drinking water. They can enter the body as we consume the water and can lead to a variety of diseases, most of which can be life threatening.
Most drinking water is treated with disinfectants at source by the water company to ensure that it remains safe for consumption. However, once it leaves the water treatment plant no further disinfectant is added and as such the distribution network has to be kept clean and micro organism free in order for the drinking water to reach the end consumer safely.
Any new pipe, repairs or refurbishment pipe work connected to the current mains supply network has to be clean and contaminant free to ensure cleanliness of the existing network. If contaminated pipe work is added to the current network it has the potential to contaminate the entire system, probably inflicting illness in a whole bunch of people.
As such all new pipe work has to be disinfected just before use. The principle of this procedure is to introduce chlorine into drinking water, the most common chlorine releasing substance being sodium hypochlorite. When this is added to water chlorine is released and this chlorine is a strong oxidant which can swiftly kill all living cells. The process used for new water pipe is known as chlorination and utilises this chlorine at 50 ppm in place for the very least 1 hour to destroy all damaging micro organisms. The system is afterwards flushed through with fresh water and sealed to decrease the chance of additional ingress of micro organisms and dirt.
Any company carrying out work such as a new mains chlorination must possess the appropriate health and safety training and all personnel must hold the Blue Water Hygiene Card. This is a training program created for personnel working on potable drinking water supplies to make certain they are acquainted with the issues of contamination and the dangers involved.
All work carried out should supply a chlorination certificate from the company carrying out the work and this must include such elements as date, pipe dimensions and volume, chlorine level, contact time and final chlorine level immediately after flushing. Microbiological analysis of the drinking water inside the chlorinated water pipe must also be carried out to guarantee that no microbial contamination of the pipe work remains.
Once the chlorination procedure has been carried out and the microbiological evaluation has arrived back clear the new pipe work may be joined on to the existing water network.

Author's Resource Box

Get wider info on chlorination to learn if you have use for a chlorination certificate for your water system.

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Tags:   chlorination, chlorination testing, chlorination certificates, water chlorination, mains chlorination

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Submitted : 2011-01-31    Word Count : 870    Times Viewed: 385