ATS DWS-8C, Installation & Operation Manual

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9
SANITATION PROCEDURE FOR INSTALLATION
AND BULB REPLACEMENT:
HOW TO DISINFECT A WATER SYSTEM:
Every new well, or existing water supply system that has been disrupted for service or repair, should be
disinfected before it is returned to use. Water in the well and storage tank should be treated with a strong
chlorine solution to destroy disease causing organisms. All pipelines and fixtures in the distribution system
should be rinsed and flushed with chlorinated water. Upon installation of a U.V. disinfection unit or yearly
bulb replacement service, disinfection with chlorine to initially flush the system is recommended to assure line
sanitation prior to U.V. start up.
The source of chlorine can be ordinary household liquid laundry bleach (about 5.25% available chlorine). The
quantity required depends on the volume of water to be treated. The United States Environment Protection
Agency (EPA) indicated that about 100 parts of chlorine, by weight, mixed in a million parts of water will
destroy essentially all water-borne disease organisms. Table 1 shows the quantity of liquid bleach required to
disinfect wells of various diameters and depths.
DISINFECTION PROCEDURE:
DRILLED WELLS:
Remove the well cap or seal from the casing and measure the depth of the water in the well, then refer to
Table 1 to determine how many chlorine pellets should be used. In some instances removing the seal to
measure the water can be a difficult task, and it is easier to estimate well and water depth from well log or
other records. Determine if there is an unobstructed path from the top of the well to the water level. If it is not
possible to remove the well cap, remove vent or sanitation access plug.
Drop one pellet into the well and listen to hear if it hits the water. If the pellet hits the water, drop one-half the
number of pellets determined to be needed into the well. These will sink to the bottom and sanitize the lower
part of the well.
Mix the remaining pellets in a few gallons of water in a CLEAN plastic container and pour the solution into
the well.
In order to mix the chlorine thoroughly throughout the entire water system, it is necessary to recirculate the
water in the well. This can be accomplished by connection of a hose to an out side faucet that is located after
the pressure tank. Use the hose to run water back down the well (this also rinses upper portion of well). After
about 15 minutes of recirculation of the water, a strong chlorine odor should be apparent. Turn off hose.
Bypass water softener and filters and open each water outlet in the water system until chlorine is
present in water. This procedure assures that all the water in the system is chlorinated.