Apec Water ULTIMATE - Sluggish Flow At Dispensing Faucet; System Slow Shut-Off: Discharge water runs for hours (6-7 hrs) - but Eventually Stops

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7) How to Test RO’s Shut-Off Function:
The RO system should shut off automatically when the tank is filled. When the RO fails to shut off
after tank is filled, the discharge water will keep running down the drain, depleting the pre-filters,
the membrane, and costing high water bills.
See Fig.16. The Flow Restrictor is located on the black drain line. The Check Valve is
located at point E. These two valves control the RO’s shut off function.
If one of these valves fails (valve worn out, clogged, or defective), the system cannot shut off, and
the discharge water fill keep running non-stop.
Do test #1 and #2 below to determine if the RO can shut off, and if the valves are OK.
Test#1: Can the RO system shut off?
- Draw 2-3 glasses of water from spigot. RO will start making water to fill tank.
- Turn OFF the tank’s valve to mimic “tank full”.
- If your RO feeds multiple output points (icemaker, bathroom, etc), shut OFF those lines.
- Wait for 3- 5 minutes, then check to see if the discharge water stops running.
- Check discharge water by either “listening” or actually pulling out the drain line to look at it.
- If discharge water stops running --> The RO is shutting off properly. Both the Flow
Restrictor valve and the Check Valve are working fine. Stop testing.
- If discharge water continues to run --> Then either the Check Valve and/or the Flow
Restrictor valve is defective. Proceed to
Test #2.
6) System Does Not Shut-Off: Discharge water runs all day - and Never Stops
- One of the shut-off valves is defective, so RO cannot shut off —> Do a shut-off test to
determine which valve is defective. Do test as shown below.
32
7
)
H
o
w t
o
T
es
t R
O
’
s
S
h
u
t-
Off
F
u
n
c
ti
o
n:
The RO system should shut o
ff
automatically when the tank is
f
illed. When the RO
f
ails to shut o
ff
a
f
ter tank is
f
illed, the discharge water will keep running down the drain, depleting the pre-
f
ilters,
the membrane, and costing high water bills.
See
Fig.1
6
. Th
e
Flow Restrictor is located on the black drain lin
e
. The Check Valve is
l
ocated at po
i
nt
E
. These two valves control the RO’s shut o
ff
f
unction.
If
one o
f
these valves
f
ails (valve worn out, clogged, or de
f
ective), the system cannot shut o
ff
, and
the discharge water
f
ill keep running non-stop.
D
o test #1 and #2 below to determine i
f
the RO can shut o
ff,
and i
f
the valves are O
K.
Test#1: Can the RO system shut off
y
?
-
D
raw 2-3 glasses o
f
water
f
rom spigot. RO will start making water to
f
ill tank.
-
T
urn OFF the tank’s valve to mimic “tank full”.
TT
-
If your RO feeds multiple output points (icemaker
, bathroom, etc), shut OFF those lines.
r
r
-
W
ait for 3- 5 minutes, then check to see if the discharge water stops running
.
W
-
Check discharge water by either “
l
istening” or actually pulling out the drain line to look at it.
-
If discharge water
stops running
r
--> The RO is shutting o
ff
properly. Both the Flo
w
Restrictor valve and the Check Valve are working
f
ine. Stop testing.
-
If
discharge wate
r
co
nt
i
n
ues
t
o
r
un
--> Th
e
n
eith
er
the Check Valve and
/o
r the Flow
r
Restrictor valve is de
f
ective. Proceed to
Tes
t #
2
.
6
)
System Does Not Shut-Off: Discharge water runs all day - and Never Stop
s
y g y p
-
O
n
e
of
th
e
s
h
u
t
-
o
ff
valves is de
f
ective
,
so RO cannot shut o
ff
—
>
D
o
a
s
h
u
t-
off
t
es
t t
o
d
etermine which valve is de
f
ective. Do test as shown belo
w.