With a three-way diverter, the shower system is able to divert water through a showerhead, a hand showerhead and a tub faucet. This will be different from person to person, depending on your location and a simple water test can be done at home. The point is to have a rough idea of the impurities in your water supply so you can buy a shower filter with a matching filtration system.
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Agustin Treasure
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