Reverse osmosis making noise


Old 08-28-19, 10:30 AM
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Reverse osmosis making noise

I changed all of the filters in this unit (EC-RO450) a few months ago and ever since, it makes a loud groaning sound whenever another water source is used in the kitchen. ie sink, dishwasher, icemaker. It happens when the other water sources shut off.
The unit is under the sink


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