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D P Cleaning Services use a Reverse Osmosis 5 stage filtration system to purify the water. This filters consists of a micron sediment pre filter, a solid carbon block filter, a 0.5 micron Carbon filter & self cleaning reverse osmosis membranes. This filter typically reduces the impurity of the water to between 1 & 30 Parts Per Million (ppm), average kitchen tap water is between 340 & 550 ppm.
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