Installation Guide
29
3) Tank Takes Long Time To Fill (does not meet claimed GPD)
- Insufficient water pressure (below 50 psi for non-pump systems) —> Increase house water pressure or
add an appropriate pump to system.
- Low water temperature (below 77 degree F ) —> Increase house water pressure or add pump to com-
pensate for low (cold) water temperature.
Claimed GPD:
The claimed gallon per day (GPD) flow rate for each RO model is rated based on 60 psi input water
pressure at 77 degree F water temperature. At this standard water pressure and temperature, the ROES
-UV75 gpd system should make about 3.5 gal of filtered water per hour, the 4-gal tank should fill in
1-1.5 hours.
Lower water pressure and colder temperature will slow the system’s output to less than the claimed GPD
flow rate.
Please check your water pressure as the first step in determining the cause of slow flow rate
(low GPD)
.
2) Sluggish Flow At Dispensing Faucet
- Insufficient water pressure (see “RO Basics” for explanation) —> Check water pressure. If too low for this
chosen RO model, either increase your water pressure or add pump to RO system.
- Input water to RO is blocked —> Make sure Feed water valve is fully opened and unhindered.
- Tank not filled yet —> Wait until tank is more filled, takes 2-3 hours average.
- Low tank pre-charge pressure —> Raise tank pre-charge to 5-7 psi.
4) System Slow Shut-Off: Discharge water runs for hours (6-7 hrs) - but Eventually Stops
The most common cause for “slow-shut-off” is insufficient input water pressure. RO needs
sufficient input pressure to shut off promptly.
- Input water pressure too low (below 40psi). Not enough pressure to shut off RO promptly —>
Check input water pressure. If pressure is low, boost house pressure or add pump to RO.
- Feed water valve partially blocked, not opened fully, reducing input water pressure to RO —>
Check and fix feed water valve, make sure it is opened fully to allow maximum pressure to RO.
29
3)
Tank Takes Lon
g
Time To Fill
g
(does not meet claimed GPD)
-
I
nsu
ff
icient water pressure (below 50 psi
f
or non-pump systems) —
>
Increase house water pressure o
r
add an appropriate pump to system.
-
L
o
w water tem
pe
rature
(
below 77 d
eg
ree F
)
—
>
Increase house water
pr
essure or add
pu
mp
to com
-
pensate
f
or low (cold) water temperature.
C
l
a
im
ed
G
PD
:
The claimed gallon per day (GPD)
f
low rate
f
or each RO model is rated based on
6
0 psi
i
nput wate
r
pressure at 77 degree F water temperature. At this standard water pressure and temperature, the ROES
-
UV75 gpd system should make about 3.5 gal o
f
f
iltered water per hour, the 4-gal tank should
f
ill in
1-1.
5
hours.
L
o
wer water pressure and colder temperature will slow the system’s output to less than the claimed GPD
f
low rate.
Please check your water
p
ressure as the
f
irst ste
p
in determining the cause o
f
slow
f
low rate
(
low GPD
)
.
2
)
Sluggish Flow At Dispensing Faucet
gg p g
-
I
nsu
ff
icient water pressure (see “R
O
B
as
i
c
s
”
f
or explanation) —
>
Check water pressure. I
f
too low
f
or this
c
hosen RO model, either increase your water pressure or add pump to RO system.
-
I
nput water to RO is blocked
—
>
Make sure Feed water valve is
f
ully opened and unhindered.
-
T
ank not filled yet
T
T
—
>
Wait until tank is more
f
illed
,
takes 2-
3
h
ou
r
s
a
v
erage
.
-
L
o
w tank pre-charge pressure —
>
Raise tank pre-charge to 5-7 ps
i.
4)
System Slow Shut-Off: Discharge water runs for hours (6-7 hrs) - but Eventually Stops
yg()yp
The most common cause
f
or “slo
w
-s
h
u
t-
off
” i
s
insufficient input water pressure
pp
. R
O
n
eeds
s
u
ff
icient input pressure to shut o
ff
promptly.
-
I
nput water pressure too low (below 40psi). Not enough pressure to shut o
ff
RO promptly —
>
Check input water pressure. I
f
pressure is low, boost house pressure or add pump to RO.
-
F
e
ed water valve partially blocked, not opened
f
ully, reducing input water pressure to
RO
—
>
Check and
f
ix
f
eed water valve, make sure it is opened
f
ul
ly
to allow maximum pressure to RO.