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Registered
Join Date: Jan 2002
Location: Long Beach CA, the sewer by the sea.
Posts: 38,097
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An RO water filter makes about 3 gallons of filtered water out of 8-10 gallons. The surplus is sent to the drain. I capture mine outside and water plants with the excess so I have a good read on this.
The noise is the water being sent to the drain. Not much you can do. I hear it even with the hose going through the outside wall into my storage tank.
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