Southern Indiana | I have had a Sterling water systems RO since 2012. It is under the kitchen sink and it only supplies clean water to the cold side of the sink and the refrigerator for ice and drinking water. It does a fine job but it hums, makes weird surging noises and is very slow. Can someone help steer me in the right direction to a better, quieter and faster system. One filter says it is .5 gpm. I'm talking more like double that capacity without the weird noises. TIA |