HydroLogic stealthro300 User Manual

User Manual

 

•

®

IC

1

Description

The stealthRO300™ is a customized Reverse Osmosis water filter that
is capable of reducing up to 99% of most contaminants. This system
is designed for use with hydroponic or horticultural applications.
This system is built to give the maximum amount of flow from
the membrane while sending less waste water to the drain,
compared to similar RO filters. Please read the following setup and
maintenance guide to get the maximum results from your filter.

Table of Contents:

p 2-3

p 4-5

p 6-9

p 10-13

p 14-15

p 16-18

p 19

Precautions, Specs
& Filter Replacement Schedule

KDF Upgrade & Unit Includes

Setup

QC Fittings & Filter Changes/Maintenance
Changing the RO Membranes

Options

Component Specs & TFC Rejection Chart

Warranty/Support

Troubleshooting

p 20-21

2

Precautions:

Reverse Osmosis Membrane Diagram

Product Water Collection Material

Waste Water

Tube

Product Water

Membrane

Feed Channel Spacer

Outer Wrap

Perforated Central

Brine Seal

Source Water

Feed Channel Spacer

Membrane

STEALTH-RO300

31036

Part Number Flow Rate

Inlet

Tubing

Size

Product

Tubing

Size

Waste

Tubing

Size

3/8” 1/4” 1/4”

*see page 17 for operating limits

300 GPD (Gallons Per Day) *

12.50 GPH (Gallons Per Hour)

• Do not install the unit where the source/inlet pressure may be more than 80 psi or there
are excessive water hammer/spike problems. If your inlet pressure is more than 80 psi,
install a 3/8” pressure regulator (HL#10071 see pg. 14), available at your dealer or
through HydroLogic. If you suspect you may have a problem with water hammer or
pressure spikes, use the high limit pressure gauge (HL#19036 see pg. 15) to determine
what your upper pressure reading is.

• Protect unit against freezing to prevent cracking of the filter housing and water leakage.

• Keep out of direct sunlight or high intensity lights, which degrade the housing and fittings

over time. For added protection use the Algae Block Sleeve (HL# 26009 see pg. 14) to protect
from sun or lights.

• Replace both clear pre-filter housings every three years. HL#23165

• Do not drop or place heavy objects on top of unit.

• When replacing filter cartridges use the filter wrench to remove housing. Do not use the

wrench to tighten the housings. Hand tighten the housings only. Take care not to over­tighten.

• Do not install where leakage or failure may cause damage to property.

• If you are going to store or not use your stealth RO for an extended period of time

(2 weeks+), remove your membranes, seal them in plastic and put in refrigerator.

System Specifications:

Product Water

3

Filter Replacement Schedule:

22121

22110

22125

22060

6 months - 2 years

1,250 gallons of

purified water

clean regularly,

change every 6-12 months

2,000 gallons of

purifed water

Membrane Element - 2 x 150 GPD

Carbon Filter - Green - Coconut

10” x 2.5”

Sediment Filter - Pleated

10” x 2.5”

KDF85/Catalytic Carbon Filter

Hydro-Logic

Part Number

Replacement

Schedule

Low Pressure, Cold Water, High Flow Membrane

22122 6 months - 2 years

(optional upgrade)

(optional upgrade)

Filter

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2SXI Check with your municipality to see if your city uses Chlorine, Chloramines

or a combination of both. This will determine if the standard green carbon
filter is adequate or if you should upgrade to the optional KDF85/Catalytic
Carbon filter.

The carbon or

optional

KDF85/Catalytic Carbon filter are

responsible for removing chlorine and/or chloramines.

If

you don’t change these

according to the above schedule chlorine and/or chloramines

will break

through , into

the membranes and deteriorate them quickly.

BE SURE TO CHANGE YOUR PRE-FILTERS BASED ON THE FILTER
REPLACEMENT SCHEDULE!

The Flowmaster filter capacity monitor is a great way to keep track of your filter
changes. HL#19014 (See page 14)

4

If you have the upgraded KDF85/Catalytic

Carbon Filter, this is your replacement schedule

KDF85/Catalytic Carbon Reduces:

-Chlorine

-

Chloramines

-

Iron

-

Hydrogen SuPJide

-

Heavy metals

KDF85 is the most advanced media available to filter and pre-treat your
water. KDF85 is especially useful to pre-filter your water when using
Reverse Osmosis and can extend the life of your membrane when
changed regularly. This special filter is made using a blend of KDF85
and medical grade Catalytic Granular Activated Carbon. This premium
grade of carbon reduces Chloramines and Chlorine to the lowest
industry standard levels available. The media of the KDF85 filter is
superior to ordinary grades of activated carbon for chloramine
removal and is acid washed, pH buffered, and rinsed with sanitized
water. This unique process helps to ensure a neutral pH and
minimize the possibility of metal contaminants appearing after filtration.

This specialized filter is designed to double the filter life of your carbon
filter (see diagram below). KDF85 is great for people on city water with
its ability to remove the majority of all Chlorine and Chloramines.
KDF85 is also ideal for people on well or spring water sources and
can reduce many more contaminants such as: iron, sulfur, and heavy
metals than standard Carbon Filters and help your garden thrive. Water
containing contaminants such as iron and sulfur can foul Reverse
Osmosis membranes quickly and lead to poor water quality and
as a result lead to decreased yields and nutrient lock out. Thank
you for choosing HydroLogic Purification Systems for your water
filtration needs.

stealthRO300™ Unit Includes:













1. 7XEKI - Pleated, Cleanable Sediment Pre-Filter

reduces dirt, sediment, silt, rust, etc.

2. SXEKI - Green Coconut Carbon Block Pre-Filter

reduces chlorine and other toxins

3. 7XEKI- 2 x150 GPD Reverse Osmosis Membranes

reduces PPMs of Total Dissolved Solids

4. Inlet Pressure Gauge with safe zones
shows dynamic line pressure and optimal operating zones

5. 5 feet white 3/8” inlet tubing, 8 feet black 1/4” waste water tubing, 8 feet

blue 1/4“ purified water tubing

food grade LLDPE (linear low density polyethylene) tubing

6. Inline Shut-Off Valve with 1/4" Quick Connect

turns system on/off

7. Double-Ended Filter Housing Wrench

large end for pre-filter housing, small end for membrane

housing cap

8. Flow restrictor/flush kit assembly with 1:1 and 2:1 flow restrictors

determines waste to purified water ratio



5

5

WXIEPXL63300

™

Setup



%

&

& Once you have chosen the flow restrictor install it into the

flow restrictor/flush kit assembly (push both ends of the flow restrictor
all the way into the open quick connect fittings). Note: The flow
restrictor can be installed in either direction.

% The system comes with 2:1 and 1:1 flow restrictors which

determines the waste water to purified water ratios. The 2:1 (white
tubing) flow restrictor will give you the best trade off between
membrane life and waste water. If you have relatively low
Parts Per Million (PPM) source water or desire less waste water you
can choose to use the included 1:1 (purple tubing) flow restrictor.

Warning: The purple1:1 flow restrictor reduces waste water and can lead
to reduction in the membrane(s) life. The higher the source water’s PPM,
the shorter your membrane(s) life will be. USE AT YOUR OWN RISK if
the source water is above 300 PPM.

' Next take the flow restrictor/flush kit assembly and install it on the

system by pushing the short piece of pre-installed black tubing on the
flow restrictor/flush kit assembly into the open black quick connect fitting
on the ASOV.

2SXI When starting up the system for the first time, make sure that the blue valve on the
flow restrictor/flush kit assembly is in the open position (parallel with tubing). In order to
flush the carbon pre-filter properly please run for 2-3 minutes and discard
all water. It is recommended to power flush the system once a week
for 5 minutes. This will help remove scale build up on the membrane(s).

'

(

( Once the initial flush is complete turn the blue valve on

the flow restrictor/flush kit assembly to the closed position
(perpendicular to the tubing). The blue valve should be in the
closed position for normal operation.

WXIEPXL63300

™

Setup (cont.)

7

ASOV

I

WXIEPXL63300

™

Setup (cont.)

8

1. Source/Inlet Line (White)

2. Purified Water Line (Blue)

3. Waste Water Line (Black)

4. ASOV

5. Blue Valve











1EMR9RMX7IXYT

There are 3 long lengths of tubing included with the system. Push the
3/8" white inlet tubing into the 3/8” QC pressure gauge

fitting. Connect
the 1/4” blue purified water tubing to the blue outlet of the Automatic
Shut-Off Valve. Connect the 1/4” black waste water tubing to the
outlet of the flow restrictor/flush kit assembly. You are now ready to
connect the included garden hose adapter to your source water and
the other end of the 3/8” white inlet tubing. There are a variety of feed

valve options available to connect to any existing plumbing. Inquire at
your dealer, or through HydroLogic.

of the purified water to stabilize.

Be sure the flow restrictor/flush kit assembly's blue
valve is open (handle is parallel with tubing. Refer
to page 7). Next, slowly turn the source water on
until both the carbon and sediment filters have water in
the housings. Once both pre-filter housings are full,
open source water up all the way (do not exceed
80 psi). Power flush the system for 2-3 minutes when the
system is new and/or when you replace your carbon
filter. Next, close the blue valve and continue to flush
the membrane for 30-45 minutes. This will flush out the
food grade preservative in the membrane.

After the initial 30-45 minute flush turn the inline
shut-off valve (pre-installed on the blue purified water
line) to the off position (perpendicular to the tubing).
This will shut the water off on both the blue and
black lines, and pressurize the system. This is a good
way to make sure that all the fittings and
connections are secured properly and that there are no
leaks. It is also a good way to make sure that the
Automatic Shut-Off Valve (ASOV) is working properly,
meaning the black drain line is also shutting off
shortly after the blue line shuts off. If there are problems
of any kind please contact HydroLogic directly at
888-426-5644

Note: It may take up to 24 hours of running the system for the PPM & pH

9

WXIEPXL63300

™

Setup (cont.)

installation guide video available at:

http://www.hydrologicsystems.com/products/stealth-ro-300

Push In/QuickConnect Fittings

Connecting Push-In Fittings:

Push tubing firmly into the fitting, all the way

to tube stop. The collet
(gripper) has stainless steel teeth which hold the tube firmly in position while
the O-ring provides a permanent leak proof seal. Pull tubing to check for
security. If some tube pulls out, then push all the way in again until it stops.
It is good practice to test the system prior to leaving site and/or before use.

Disconnecting Push-In Fittings:

Ensure system is depressurized before removing fittings. Push in the collet
evenly against the face of the fitting. With the collet held in this position the
tube can be removed by simply pulling. You can use a collet release tool HL#
24010

(available from your dealer) or small crescent wrench. The fitting can
then be re-used. If the tube has been removed several times you may see score
marks on the ends, and this can lead to leaks. It is best to cut the end off
of the tubing with a sharp blade, being careful to cut straight across. Any
angle to the cut can cause a leak.

Filter Changes / Maintenance

It is essential that you change your pre-filters regularly. The green carbon
filter has a rated life of approximately 1,250 gallons* of purified water
produced. The sediment filter can be cleaned at your faucet or with a
garden hose as often as you like. You should change the sediment filter at
least once a year or sooner if you have extremely dirty water.

*2,000 gallon filter life with KDF85/catalytic carbon filter

Link To Instruction Video

https://goo.gl/L8b5Ri

10

STEP 1:

Remove the white 1/4” tubing
from the membrane housing

Next, pull that same end of the
membrane housing straight up
to release it from the clip

1)

2)

11





Filter Changes / Maintenance (cont.)

Dirt can become embedded in your pre-filters and cause slower flow rates.
Use the included filter wrench to loosen the clear filter housing.
Be careful not to over-tighten when reinstalling. It is preferable
to hand tighten filter housings after a filter change.

The Reverse Osmosis membranes have a useful life of 6 months to 2 years depending
on how high your source water PPM is, if there are high levels of certain contaminants
(such as iron & silica), how much water you produce and regular pre-filter
maintenance. If your water is highly contaminated, then you may need to change the
membranes more often. If your water is relatively clean and you keep up with your
pre-filter changes they may last 2 years+.

There are two indications as to when to change your membrane(s):

1PPM rejection %: Test the RO product and source/inlet water to see what
percentage of the inlet water’s PPM the WXIEPXL63300

™

is filtering out

(rejection %). You should see approximately 98% of the inlet PPM’s being
removed when the membrane is new. If the rejection % falls under an acceptable
level (typically 90%) it’s time to change the membrane(s):

2 When the flow rate of the product water slows down significantly.

This can also happen if your pre-filters are clogged. If you change your pre-filters
and the product water still flows slowly then it’s an indication you need a new
membrane(s). When in doubt, contact HydroLogic.

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Changing the RO Membrane (cont.)

STEP 3:

You can now remove the membrane with either a strong set of needle nose
pliers or something similar. Hold onto the membrane housing body and
pull straight out until you release the membrane. It may seem tight, but
with even pressure it will come out.

12

STEP 2:

Firmly grip the membrane
.housing and twist the membrane
cap counter clockwise using the
provided

filter wrench.

Changing the RO Membrane (cont).

STEP 4:

Push the new membrane back into the housing with the end that has the two black o-rings
going in first. Push firmly until it bottoms out and can’t go in further. Then thread the cap back
on tightly and reconnect the white 1/4" tubing. . Be sure the o-ring in the cap is in place.

Important Information & Performance Parameters

Reverse Osmosis is the most efficient and cost-effective way to remove the majority of all
contaminants from your water. The key component of the system is the RO membrane composed of
tightly wrapped sheets of a semi-permeable material. Under pressure, the membrane allows pure
water to pass through it and rejects, or flushes away, most impurities down the drain. That is why
all RO systems have a certain amount of waste water. The ratio of waste water is determined by the
flow restrictor installed in the flow

restrictor/flush kit assembly. The system comes with a choice

o f 2:1 and 1:1 flow restrictors. Refer to page 6.

The flow of purified water is determined by the GPD rating of the membrane, inlet pressure and inlet
temperature. The stealthRO300™ has the capacity to produce 300 gallons per day (approx. 12.50
gallons/hour) when your inlet water is at 77 ºF, 60 PSI, 500 PPM. If your inlet pressure is less than 60
psi, you may experience less than the rated 300 GPD flow rate. A minimum of 40 psi is required to
operate the system. The higher the inlet pressure, the better the flow. A booster pump is available as an
option in case of low pressure and is necessary if your pressure is below 40 PSI (HL# 29020).

You will notice in colder areas or in the winter, when water temperatures are lower, that the flow rate
will be slower.

Inlet water that is very high in total PPM or very hard with calcium or magnesium, or high in certain
contaminants such as iron or silica may shorten the life of the membrane and/or cause slower flow
rates. The RO membranes can handle inlet water up to 1,000 PPM and with a hardness up 10
grains per gallon (170 PPM). Note that this is considered both very contaminated and very hard water
and may shorten the life of your membrane. At these levels of contamination and hardness, and
especially beyond, you may consider pre-treatment in the form of a water softener or other
equipment. Softened water can be run through your stealthRO300™ system for optimal
performance. The membrane in the stealthRO300™ is capable of removing 99% of salts that
are introduced by the softener. Contact HydroLogic for more info at 888-426-5644.

All RO systems exhibit “TDS creep”. The first few ounces of RO water produced are higher in PPM than
after the system has run a few minutes. Take any PPM readings a full five minutes after turning the
system on to ensure accuracy. Call us with questions about how to customize your water filtration needs
and pre-treatment equipment.

13

STEP 5:

Run the system for 30-45
minutes , discarding all
purified and waste water
before using.

14

Options

4VIWWYVI6IKYPEXSVz

,0

For high inlet pressure. Limits
pressure to below 85 PSI.
Simply connects onto the
source/inlet line.

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,MKL*PS[1IQFVERI

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Replaces standard membrane and
is capable of producing 200 Gallons
Per Day. Approximately 93% PPM
rejection. Overcomes low pressure
and low temperature issues that can
decrease ow rates.

*PS[QEWXIV
9PXVE0S[*PS[1SHIP

,0

Gallonage & lter capacity monitor.
Operates at ow rates between

0.01-0.5 GPM. Ultra low-ow
model. Alerts you when it's time to
change your lters and measures
total number of puried water
gallons produced.

&SSWXIV4YQT,0

FoFor low inlet pressure under 40 PSI.
Boosts pressure to 60+ PSI, giving
faster flow rates. Simply connects
onto the source/inlet line.

*PSEX:EPZIz,0

Fill any tank or reservoir unattended.
Can be installed in lid or sidewall of tank.

NEVER FLOOD YOUR GARDEN AGAIN!

/(*'EXEP]XMG'EVFSR

Upgrade Filter ,0

Reduces chloramines, chlorine,
iron, sulfur and heavy metals. Great for
well or city water sources.

%PKEI&PSGO7PIIZI

,0

Neoprene sleeve that covers all
standard clear housings. Blocks
light so no algae can grow easily
removed to check status of lters.

Reversible blue and black.

0IEO(IXIGXSV
7LYX3JJ:EPZIz

,0

Installs on source/inlet line. If there
is a leak anywhere in the system
and water reaches the pad on the bottom
of the leak protector, the
valve shuts off all incoming water
preventing further damage from
the leak.

UV Sterilizer Kit HL# 35015

Kills 100% of all bacteria and viruses. Ensures
the safest water.

Pressure Gauge - High Limit
HL# 19036

Measures static pressure as well as high limit
pressure. Used to diagnose water hammer or
pressure spike issues. Also used to get
accurate inlet pressure to determine if
pressure booster is necessary for a
Reverse Osmosis system.

Drinking Water Upgrade Kit
HL# 26016

The Stealth drinking water add-on kit is for
the horticulture enthusiast that also wants
to use their system as a home drinking water
system.

Fittings
HL# various - see website

Fittings are available to customize your
setup. Visit www.hydrologicsystems.com

Tubing
HL# various - see website

Extra tubing is available to customize your
setup. Visit www.hydrologicsystems.com

TDS Monitor
HL# 19006

Measures unpurified water PPM going into
reverse osmosis system and purified water PPM
coming out. Monitors the performance of your
RO system. Instantly displays values and allows
you to switch back and forth between dirty and
clean water TDS.

De-Ionization Add On Kit
HL# 33005

This de-ionization filter is designed to serve as
a post polishing stage for any Reverse Osmosis
system delivering ultra pure 000 PPM water.
Color-changing resin indicates when it is time
for a replacement.

15

Options (cont.)

16

Component Specifications

7IHMQIRX*MPXIV4PIEXIH'PIEREFPI

• 5 micron nominal filtration

• SURFACE AREA: Approximately 4 sq. ft. (0.37 M2)

• TEMPERATURE LIMIT: Up to 140 °F (60 °C) depending on

pressure and time under load

• FILTER MEDIA: Polyester

- Plus

™

• END CAPS: Plastisol (pliable PVC)

Features and Benefits

• 10 micron nominal filtration

• No release of carbon fines

• Exceptionally low pressure drop

• Meets NSF61 standards

• Performance validated by WQA

• NSF ce rtified for material safety

• Industry leading pe rformance

'EVFSR*MPXIV'SGSRYX)EVXL*VMIRHP]

Hydro-Logic is proud to introduce the first Carbon Block to use NSF61 listed
Greencarbon. This high performance coconut shell carbon is manufactured using

a patented process that significantly reduces harmful greenhouse gas emissions.

These carbon blocks are made using coconut shell Greencarbon which has more
micropores than other types of carbon and a unique binder system delivering a
product with superior absorption capacity and kinetic dynamics.

This combination of high performance carbon, unique binders, and proprietary
manufacturing processes delivers exceptionally low pressure drop, high dirt
holding capacity, and excellent contaminant reduction.

238) Use only with microbiologically safe and adequately disinfected water.

Do not use with water of any unknown origin or water quality.
When in doubt contact HydroLogic to order a water analysis kit.

Component Specifications (cont.)

RO Membrane:

stealthRO300™ TF Membrane Elements are recognized as one of the

industry’s most reliable and highest performing membrane elements
that deliver consistent performance and quality. Advanced
membrane technology and manufacturing processes allow these
elements to deliver consistent results.

• Superior Quality and Cost Savings

• Individually Tested and Sanitized

• Made in the U.S.A.

RO Membrane Operating Limits: Very Important

17

• DOW flat sheet material

• 96% – 99% PPM Rejection

• Improved System
Performance

• MEMBRANE TYPE: Thin Film Composite

• MAXIMUM OPER ATING TEMPERATURE: 113 °F (45 °C)

• MAXIMUM OPER ATING PRESSURE: 100 PSI

• MAXIMUM FEED FLOW R

ATE: 2 GPM

• MAXIMUM TDS: <1000 PPM

• MAXIMUM HARDNESS: <10 Grains Per Gallon (170 PPM)

• PH RANGE, CONTINUOUS OPERATION: 2 - 11

• MAXIMUM FEED WATER TURBIDITY: 1 NTU

• MAXIMUM FEED SILT DENSITY INDEX (SDI): 5 SDI

• CHLORINE TOLERANCE: 0 PPM

• CHLORAMINE TOLERANCE: 0 PPM

• MANGANESE TOLERANCE: 0 PPM

• IRON TOLERANCE: <1 PPM

• SILICA TOLERANCE: <10 PPM

NOTE: Operating your membrane outside of the parameters voids the warranty.

TFC Membrane Rejection Chart

PolyP

18

1-888-426-5644

Visit us on the web at: www.hydrologicsystems.com
There are a variety of videos under the resources tab

19

Warranty & Support

A one year warranty against manufacturer's defects comes with each unit.

This does not include clogged or damaged pre-filters or RO membranes due
to lack of regular maintenance or excessive sediment, chlorine, chloramines,
iron, silica, manganese, sulfur or

PPM in the source water.

This warranty also
excludes damage caused by using the unit outside of the specified operating
parameters listed on page 17. Do not operate unit if incoming pressure exceeds 80 PSI
or there is problem with water hammer or pressure spikes.

WARNING: USING NON-ORIGINAL REPLACEMENT FILTERS OR
MEMBRANES WILL VOID THE WARRANTY

Change both clear pre-filter housings every three years, available through your

local dealer. HL#23165

DO NOT BRING UNIT BACK TO THE DEALER WITHOUT CONTACTING
HYDROLOGIC FIRST

Contact HydroLogic directly for questions and warranty issues

The manufacturer believes the information and data contained herein to be accurate
and useful. The information and data are offered in good faith, but without
guarantee, as conditions and methods of use of products are beyond the
manufacturer ’s control. The manufacturer assumes no liability for results obtained or
damages incurred through the application of the presented information and data. It is
the user ’s responsibility to determine the appropriateness of the products for the
user ’s specific end uses

Tech Support/ Contact:

Please contact HydroLogic for all questions.
[e-mail]

TROUBLESHOOTING

1.Q: The system is brand new, why is the flow rate of purified water so slow?

A: The system’s GPD capacity is achieved when you have the following
conditions for your source water: 77 °F, 500 PPMs, 60 PSI. If your source water
is colder than this, or your inlet pressure is lower, or your PPMs are significantly
higher, then you will experience less than the rated GPD flow rates. Hydrologic
provides solutions to these less-than-desirable source water conditions. For
instance, we have a pressure booster pump for low psi, pre-filtration for high
PPMs, and cold water specific membranes. Call us for information.

2.Q: Why has the flow rate of purified water slowed down over time?

A: This can be due to multiple factors, such as clogged sediment or carbon pre­filter, clogged or fouled membrane, or changes to source water conditions. The
quality of your water, frequency of use, and timeliness of pre-filter changes will
determine how long your system performs at peak capacity.

3.Q: Why have the PPMS of the purified water increased over time?

A: This is typically due to deterioration of the membrane as a result of exposure
to chlorine. The purpose of the carbon filter is to remove chlorine from the water.
If It isn’t changed on schedule, chlorine will pass through to the membrane and
degrade it, causing more water to flow out of the purified line and an increase in
PPMs.

4.Q: Why is the waste line running faster than the purified water line?

A: If you’re using the 2:1 flow restrictor, that means the system will produce 2
parts waste water to one part purified water. If you’re using the 1:1, you should
have equal parts waste to purified water.

5.Q: Why does the waste line continue to run when the purified water line is
closed off?

A: Over time, the automatic shut-off valve (ASOV) can accumulate scale and
become clogged, causing it to malfunction. If you experience your waste line
continuing to run after the purified water line is closed, please give us a call.

20

21

TROUBLESHOOTING (cont.)

6. Q: Why is the system leaking?

A: This can be due to various reasons, including Teflon tape at threaded
fittings, tubing not being pushed in all the way to the quick-connect fittings, or
improperly seated O-rings in pre-filter and membrane housings. It is also
important to make sure the ends of the tubing have a clean cut before inserting
them into the quick-connect fittings (see page 10) Please call us if you’re
experiencing any leaks.

7. Q: Why did the clear pre-filter housing crack?

A: This can be due to freezing conditions, excessive pressure spikes, or long­term exposure to high intensity lighting.

8. Q: Why is the pH of the purified water higher/lower than the source water

A: The pH of the purified water depends entirely on source water chemistry.
Customers can experience either slightly lower or higher pH due to their source
water. This is completely normal for reverse osmosis technology. Since RO
water is almost pure H2O and has no ability to buffer pH, the actual pH
reading will not be accurate until you add minerals back.

9. Q: Why are both the 1:1 and 2:1 flow restrictors included in the box?

A: The flow restrictor determines your waste to purified water ratio. HydroLogic
has always provided two options for the waste to purified water ratio, because
water conditions vary considerabley across the world; one fixed ratio would
not work for every water condition. Please see page 6 for more detailed
information.

22

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