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12
TROUBLESHOOTING
Not Enough Water From Holding Tank
Possible Cause
Feedwater valve is plugged or
closed.
Sediment/carbon prefilter or carbon
post filter is clogged.
Low incoming water pressure.
Reverse osmosis membrane is
fouled.
Air pressure in holding tank is
incorrect.
Air bladder in holding tank is
ruptured.
Holding tank valve is closed.
No water to drain. Drain flow
restrictor is clogged.
No water to drain. Air gap faucet is
clogged.
Check valve on the reverse
osmosis membrane housing is
stuck.
The automatic shut–off valve is
malfunctioning.
Low Water Pressure From Dispensing Faucet
Possible Cause
Air pressure in holding tank is
incorrect.
This is the #1 reason for low flow
from reverse osmosis faucet.
Carbon post filter is clogged.
Holding tank valve is partially
closed.
The faucet is out of adjustment or
faulty.
Heavy water use. Holding tank is
empty.
RF – Series User Manual
MKTF – 167-C
Solution
Open valve or unclog.
Replace filters.
Incoming water pressure must be above 40 PSI. Install a booster pump or
permeate pump.
Make sure incoming water pressure is within operating limits. Make sure drain
line is not clogged. (See High TDS) Correct cause of fouling and replace
reverse osmosis membrane.
Empty water from holding tank. Air pressure in valve stem should be between
8 – 10 PSI.
Replace holding tank.
Open valve.
Replace drain flow restrictor.
Clear or replace air gap faucet.
Replace check valve.
Replace automatic shut–off valve.
Solution
Open faucet and empty water from holding tank. Shut off feedwater to system
and remove holding tank from under sink. (The tank is easier to work on.)
Locate the air valve stem (just like on a car or bicycle tire) and add air. If there
is still water in the tank, continue to add air until all the water is removed.
Once all the water is removed, continue to add air and pressurize to 8 PSI.
Re–install the tank under the sink, turn on the feed supply to the system and
allow the tank to fill.
Replace post filter
Open valve.
Repair or replace faucet.
Allow holding tank to refill.
16
05/17
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