Noise can be sporadic and periodic as a result of a sudden surge in water pressure in your household. If it occurs, don't be too over-anxious to pinpoint the cause. Observe and give it a few days before you pinpoint the exact cause.
| 
 Problem 
 | 
 Causes 
 | 
 Identify 
 | 
 Solution 
 | 
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| 
 1 
 | 
 Humming/Buzzing Noise 
 | 
 1. Air trapped in check valve  | 
 See Figure 2, Point E  | 
 1. Flush out the Air Bubbles, after a few minutes the sound should subside 2. Replace the Check Valve 3. Foaming around the RO system  | 
|
| 
 2 
 | 
 Sputtering/Jack Hammer Noise 
 | 
 1. Defective ASO (Very Rare) 2. Forgot to insert membrane 3. Membrane inserted wrongly  | 
 1. Water in ASO can't flow smoothly See Figure 2, Point C 2. Empty membrane housing 3. Membrane inserted Wrongly  | 
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| 
 3 
 | 
 Severe Vibration 
 | 
 Wrong Line Installation 
 | 
 See diagram and point identification 
 | 
 Rectify it 
 | 
|
| 
 4 
 | 
 Noise from drain 
 | 
 1. Location of drain saddle 2. Inherent 3. Restriction in Drain Line  | 
 1. Set the drain saddle on the drain pipeas low as possible. See Figure B, point W. 2. None 3. Clean the drain line  | 
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