Millennium Enterprises MRO-35 User Manual

Reverse Osmosis Drinking Water System

Millennium

Model MRO-35

PERFORMANCE DATA SHEET

Tested and Certied by NSF International against
NSF/ANSI Standard 58 for the reduction of:
Arsenic (Pentavalent), Barium, Cadmium, Chromium
(Hexavalent), Chromium (Trivalent), Copper, Cyst, Fluoride,
Lead, Nitrate, Nitrite, Radium 226/228, Selenium and TDS.

This reverse osmosis system contains replaceable treatment components critical for effective performance. It is the user’s responsibility to, and
the manufacturer strongly recommends that the user, periodically test the product water to verify that system is performing satisfactorily.

A note for systems with the Water Quality Monitor:

The Water Quality Monitor has been integrated into the system cover for instant monitoring at the touch of a button. The monitor compares
the level of the total dissolved solids in the incoming (feed) water versus the product water and calculates the percent rejection. The monitor is
preset to indicate a level of 75% rejection. NSF/ANSI Standard 58 requires a 75% total dissolved solids rejection to pass the requirement of the
standard.

A green light indicates that the percent rejection is at or above the set (desired) value and that the system is producing quality water.

An amber light indicates that the product water quality is less than acceptable. Because the Water Quality Monitor was designed to operate best
while the system is making water, a false reading may occur if tested when your R.O. drinking water system is not making water. Please empty
the storage tank, wait 15 minutes for the system to begin making water, and test your water quality again. If the Water Quality Monitor light is

still amber, change the 9 volt battery and test your water quality again. If the Water Quality Monitor light is still amber, please contact a water
treatment professional for service. The Water Quality Monitor requires a 9 volt battery, which is included.

If Millennium replacement lters and membranes are not used, health related contaminant reduction claims are invalid.

MILLENNIUM REVERSE OSMOSIS DRINKING WATER SYSTEM

SYSTEM RATING

Average T.D.S. Reduction: 93%
System Production: 14 gallons per day (53 liters per day) Recovery Rating: 38% Efficiency Rating: 22%

Measured at 50 psig, 77°±2°F, 750±40 mg/L T.D.S., per section 6 of NSF/ANSI standard 58 product water to pressurized
storage tank. Recovery rating means the percentage of the influent water to the membrane por tion of the system that is
available to the user as reverse osmosis treated water when the system is operated without a storage tank or when the storage
tank is bypassed. Efficiency rating means the percentage of the influent water to the system that is available to the user as
reverse osmosis treated water under operating conditions that approximate typical daily usage. Sodium Chloride was used as a
surrogate for T.D.S. System rating determined by laboratory testing at NSF.

MEMBRANE RATING

Membrane Production: 41-53 gallons per day (155–201 liters per day) Membrane T.D.S. Reduction: 96% minimum

Note: Measured at industry standard condition of 65 psig, 77°F, 250 ppm T.D.S., and discharging to atmosphere. Actual system
production and contaminant reduction will depend upon water temperature, pressure, pH and T.D.S. level, membrane variation
and usage pattern.

(The cyst reduction claim includes oocysts of Cryptosporidium and cysts of Giardia and Entamoeba.)

Water supplies that exceed limits for Hardness,
Iron, Manganese and Hydrogen Sulfide require
pretreatment.

REDUCTION PERFORMANCE CLAIMS:

This system has been tested according to NSF/ANSI 58 for reduction of the substances listed below.
The concentration of the indicated substances in water entering the system was reduced to a concentration less than or equal to the permissible limit for water
leaving the system, as specified in NSF/ANSI 58. Testing was performed under standard laborator y conditions. Actual per formance may vary.

APPLICATION GUIDELINES/SPECIFICATIONS AND FEATURES

Water Supply Parameters

Water Pressure: 40–100 psig

(280–690 kPa)

Water Temperature: 40°–100° F

(4°–38° C)
pH Operating Range: 4–11
Optimum rejection at pH: 7.0 - 7.5
Max. T.D.S. Level: 2000 ppm

Chemical Limit

Hardness: <170 mg/l
Iron: <0.1 mg/l
Manganese: <0.05 mg/l

Hydrogen Sulfide: 0

NSF/ANSI 58 Standard Requirements

Actual Test

Results

Caution: Do not use with water that is
microbiologically unsafe or of unknown
quality, without adequate disinfection
before or after the system. Systems
certified for cyst reduction may be used
on disinfected water that may contain
filterable cysts.

Test Parameters:
pH 7.5±0.5
Turbidity < 1 NTU
Temperature 77°±2° F
Pressure 50 psig
1 Unless otherwise indicated.
2 Average based upon actual test data.
3 This system has been tested for the treatment of water containing

pentavalent arsenic (also known as As(V), As(+5), or arsenate)
at concentrations of 0.30 mg/L or less. This system reduces
pentavalent arsenic, but may not remove other forms of arsenic. This
system is to be used on water supplies containing a detectable free
chlorine residual at the system inlet or on water supplies that have
been demonstrated to contain only pentavalent arsenic. Treatment
with chloramine (combined chlorine) is not sufficient to ensure
complete conversion of trivalent arsenic to pentavalent arsenic.
Please see the Arsenic Facts section of the Performance Data Sheet
for further information.

4 This system is acceptable for treatment of influent concentrations

of no more than 27 mg/L nitrate and 3 mg/L nitrite in combination
measured as N and is certified for nitrate/nitrite reduction only for
water supplies with a pressure of 280 kPa (40 psig) or greater.

5 The reduction of Radium was verified by using Barium as a surrogate

under NSF/ANSI Standard 58.

Influent Challenge

Concentration

(mg/l)

1

Maximum Allowable

Product Water
Concentration

(mg/l)

1

Average %

Reduction

2

Arsenic (Pentavalent)

3

0.30 + 10% 0.010

98

Barium

10.0 + 10% 2.0

93

Cadmium

0.03 + 10% 0.005

98

Chromium (Hexavalent)

0.30 + 10% 0.1

91

Chromium (Trivalent)

0.30 + 10% 0.1

94

Copper

3.0 + 10% 1.3

98

Fluoride

8.0 + 10% 1.5

95

Lead

0.15 + 10% 0.010 98

Nitrate + Nitrite (both as N)

4

30.0 + 10% 10.0 80

Nitrate (as N)

4

27.0 + 10% 10.0 80

Nitrite (as N)

4

3.0 + 10% 1.0

77

Radium 226/228

5

25 pCi/l + 10% 5 pCi/l 80

Selenium

0.1 + 10% 0.05

96

Total Dissolved Solids

750 + 40 mg/l 187

93

Cysts

50,000#/ml

minimum

99.95% reduction
requirement

99.99

MILLENNIUM REVERSE OSMOSIS DRINKING WATER SYSTEM

MODEL MRO-35

MODEL MRO-35

DRINKING WATER SYSTEM ASSEMBLY COMPONENTS

Sediment/Carbon Prefilter: 5 Micron/Activated Carbon Block Filter, Part No. S7128
Membrane Type: Thin Film Composite (T.F.C.), Part No. S1448RS
Carbon Post Filter: Activated Carbon Filter, Part No. S7125
In-Line Carbon Post Filter: In-Line Activated Carbon Filter, Part No. S7206W-JG

Refer to owner’s manual for proper operation, installation instructions, warranty information, ser vice inter val recommendations,
parts and service availability. See the test kit(s) for sampling instructions.