I connected mine to a standard tap where we only use the cold side to fill drinking jugs. Whenever there is a major change in pressure, e.g. For example, when the water supply is turned off to replace a toilet bowl damper, the filter experiences a slight backflow of some air trapped on the hot water side of a single lever faucet. A plume of a mixture of pure black carbon and water then emerges from each faucet downstream. I took water samples in our area when it was filtered through a good quality carbon filtered hot/cold water dispenser. It tastes great compared to what I get. Of course, these filters have much lower flow rates.
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