DOW: Flush pipes in schools, hotels weekly

LIHU‘E — The county Department of Water is recommending that all schools, hotel properties and large commercial facilities continue maintenance on their plumbing systems by flushing water throughout their property at least once a week.

The flushing process will help to prevent stagnation, clear out existing sediment and help to ensure chlorine residuals (which check microbial growth) are maintained within their facilities.

Additionally, current maintenance should also include the proper care of cooling and air-conditioning systems and frequently maintaining and flushing the property’s hot-water systems to avoid unwanted microbial growth during extended periods of non-use.

Customers are also advised to check backflow preventers to confirm they are functioning properly.

During the temporary closures related to COVID-19, many of these types of properties have significantly reduced the water demand within their systems.

A decrease in water demand, which includes the discontinued use and maintenance of water fixtures on their property, can cause stagnation in addition to existing sediment in pipes that can be stirred up in the water upon returning to normal water use.

DOW has already begun conducting flushing protocols and closely monitoring chlorine residual levels on its water systems to ensure water quality continues to be safe and remain in compliance with state and federal regulations for drinking water.

To report a water service issue, call 245-5444.

To view the latest County of Kaua‘i updates related to COVID-19, visit

Info: 245-5400

  1. LJA April 18, 2020 9:50 am Reply

    Don’t Forget the floor drains in all public restrooms. The water in the traps below the drain tend to evaporate leaving an open access for odors and other contaminants to come into the room. Good idea to add water and even some disinfectant to those drains every few days. That should be done ALWAYS. Not just during this pandemic.

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