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Many residential water wells require a chlorine bleach injector , also known as a chlorinator, either to kill bacteria, to eliminate odors, pre-treat the water for iron removal, or to treat iron bacteria. Common household bleach can used in an automatic chlorinator system to kill coliform bacteria and provide disinfected water. The first step in selecting a chlorinator is to find out your basic water chemistry and have your well water tested. The next step in selecting your metering pump is to know how many gallons per minute your well water is flowing… at the point where you will be injecting the chlorine.
Now that you know the amount of chlorine you want to install (3 ppm) and the flow rate of the water stream you are injecting the chlorine into (10 gallons per minute) you are finally ready to calculate the size of the metering pump!
Use unscented chlorine laundry bleach (which is typically about 5% chlorine) and dilute it by adding 9 gallons of water to 1 gallon of bleach.
Metering pumps are often rated by the amount of chlorine solution they can pump by gallons per day, or by the amount of solution they can pump by hour.

At this rate you can select a metering pump that can pump 10 gallons per day and adjust the output of the pump to 86% to achieve the desired 8.6 gallons per day. If you find the residual is too high, you can adjust the metering pump down to deliver less or dilute the chlorine solution with more water.
Choose a quality metering pump that is corrosion proof, easy to prime, and can pump at a high enough pressure to overcome the pressure of the pipe that the chlorine is being pumped into.
Typical installation showing chlorine bleach pump injector, on a standard well pump and pressure tank. The answer in Step 7 is the average pumping capacity of the pump in gallons per minute (GPM).
The Precision-24 Metering Pump has a degassing valve on it, that prevents gas bubbles from causing the pump to lose pressure, and helps it make it very easy to prime.
Also see proportional feed chlorinators for installing the injector after the pressure tank, or if your well has a variable speed well pump.

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Protect your family with a boxed emergency supply of long-term storage water that does not contain harmful chemicals. Chlorine Dioxide tablets will not discolor storage water or create harmful byproducts like bleach will.

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