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Water supply lines that's been stagnant for a while

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    Miamicuse
    Pro
    Fort Lauderdale, Florida

    For those of you who runs into stagnant residential supply lines, either as a plumber being called in or in a remodel/rehab where you know the property has been vacant for a while, and water has even been shutoff due to non payment, perhaps a foreclosured abandoned property, where water has not been used for months, or years. This mean you have stagnant water in the supply system with the Legionella bacteria.

    https://www.cdc.gov/legionella/about/causes-transmission.html

    Just curious once you have the water turned back on, what are your procedure to flush the system out if you know it hasn’t been used for a long time?

    My understanding is if you just say turn a hose bib on outside the water would jet out with the bacteria into the air and into your lungs. Same if you say have a broken stop valve inside and you have to cut the pipe to replace the valve or run the water through the tub/shower valve to the shower head.

    Do you do anything different to minimize your exposure to Legionella in those situations?

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