RO-PUMP - Slow and Little 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.

When trying to identify the causes of slow and little output. Isolate the RO system by shutting off your dependant applicances. Such as: ice-maker, fridge and humidifier.

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 all the feed valves are 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.
Excessive Demand
Make sure the model's capacity can support your humidifier, ice-maker and fridge's demand



Defective Pump

(Extremely Rare)


Pump is not operating at full capacity:

20psi input should translate to about 62psi

30psi input should translate to about 67psi

40psi input should transate to about 70psi

Add a pressure gauge after P2 and stage 2 filter. See if the pressure increase is apparent



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. To make it easier, you can consider upgrading to a see thru first stage housing.

Clogged Membrane
Tank pressure too low


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


Tank bladder ruptured


Tank fills full but water leaks from the tank's pressure valve. Furthermore, a raptured tank tends to be heavier than a normal full tank.



Check valve clogged

(Very Rare)

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