Instructions were easy to follow which made installation easy. Anyone can do it, even drill a hole in granite. Just remember to hold the drill and let it do its job. Start the drill before placing it on the granite at a 45 degree angle. If you start doing this after touching the granite, it will move and ruin your countertop. First I did a dry landing as I have a garbage chute and had to turn it to the side. Then I drilled a hole, assembled the faucet and connected the hose to it, connected all the other hoses and fittings and finally installed the system under the sink and connected the hoses to it last. Water turned on, electricity connected, checked for leaks. Tasty water, almost free of impurities and good water flow - no mini tank required.
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