RO-45 model & RO-90 model - No RO water output

The causes to the output problem are listed in the timeframe that you've owned your RO system. The grey background applies to systems in use for under 3 months and the white background applies to systems in use for more than 3 months.

The causes are listed from the most frequent and probable to the least likeliest.

Feed water blocked
Make sure all lines to the RO system and within the RO head are not obstructed
Untangles the lines
Input pressure too low
If your home pressure is within the model's regulation. Make sure you have the right model
Make sure the feed valve is fully turned on or exchange for the appropriate model
Wrong Line Installation
Using RO pictures and the owner's manual. Make sure all lines are correctly connected

Defective Membrane Housing

(Extremely Rare)

Waste water flows non stop down the drain line and no RO water.
Replace the membrane housing, Contact Us
Clogged Pre-filters
See the condition of the first stage filter
Clogged Membrane
Use TDS meter to measure the TDS
ASO Clogged
Check valve clogged
Test the check valve
Replace the Check Valve
No Tank pressure


An empty 4 gallon tank should have 5 psi and empty 14 gallon tank should 7 psi

Tank bladder ruptured
Locate the pressure valve on the tank to see if water is leaking out. If water is leaking out, then the tank needs to be replaced. Furthermore, a raptured tank tends to be very heavy compared to regular full tank.

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