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Quick-Change RO

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Last edit on: 2/19/17

Reverse osmosis filter, home water filter, whole house water filter

Now, Water in the Garden of Eden You Had Imagined
is Actually the Water You Will Experience at Home


"Drugs, antibiotics, hormones found in US drinking water" - Boston Globe 3/10/08
Common contaminants in water - US Water Quality Association

Point of use (POU) reverse osmosis drinking water filters
Free consultation, 31 years of experience

                                                                Page Index
Reverse Osmosis Process
Aqua Bar® Water Dispenser
Countertop Water Dispenser
Under-the-sink RO Filters
  • Deluxe 5-stage undersink
  • 5-stage with booster pump
  • 4-stage Quick-Change RO
  • Under-the-sink RO - continued
  • 4-stage QC-RO with booster pump
  • 3-stage Quick-Pulldown RO
  • Small Portable Filters
    UV sterilizer add-on
    RO System Specifications


    Price levels, post sale support, warranty, policy
    • Only the best makes/models delivering lasting value, refined over the 31 years
    • Factory direct delivery, industry-best customer service, check out Amazon feedback
    • Professional, courteous and free maintenance consultations for the life of the unit
    • Our prices may not be the lowest on the net, but your peace of mind is priceless
    • Industry standard 1 year warranty on systems, 5 years on tank, not cartridges
    • Beyond the factory warranty period, we will cover contingencies in an equitable way
    • Prosperity Management, Inc. is not responsibile for on-site installation, operation, maintenance, water leaks, stoppages or damages thereof, review disclaimer
    "I was frankly surprised when you called back Saturday evening, and helped diagnose our problem right then.
    We got our filtered water back by mid-week with replacements. You guys are super. Keep up the good work!"         George Hennish,   Fredericksburg, VA,   July 26, 2002


    Reverse Osmosis Process - What does it achieve?


    Reverse osmosis is a process in which the incoming (dirty) water is forced through a multi-layered cellophane-like RO membrane under elevated pressure. The hole size in an RO membrane is less than 0.0001 microns (1 Angstrohms).

    Water (H2O) happens to be nature's smallest liquid molecule at room temperature and it passes through the minutest holes in the membrane, likewise oxygen (O2) which is equally small. While distilled water lacks oxygen, RO water is alive with O2, hence is suitable for aquarium use. All other larger elements and molecules are stopped. The dirty water left behind is drained off at a constant rate set by a waste flow control www.ce, such that it does not get excessively dirty.

    Two types of RO membranes - Thin Film Composite (TFC) and Chlorine Tolerant Acetate (CTA). TFC membrane lasts longer than CTA but cannot take chlorine. If source water is chlorinated, TFC follows a carbon pre-filter which removes chlorine.

    Reference on reverse osmosis filter - from HowStuffWorks

    Reverse Osmosis (RO) removes substantial amounts of most foreign substance in water other than oxygen. Mechanical filters and activated carbon filters almost always accompany RO membrane. First, the mechanical filter (1) removes dirt, sediment, rusts, and such that would otherwise clog the membrane. The RO (2) filter is next. Pressurized water storage container (3) holds RO water. Activated carbon filter (4) further reduces foreign matters that pass though the membrane. Separate water tap (5) dispenses the processed water. Reverse Osmosis uses large amounts of water. Typically, about 75% or more gets discarded together with the contaminants.

    Source water quality requirements - not that strict for drinking water RO filter

    • Water temp: 85F max
    • TDS: 2,000 ppm max
    • Iron tolerance: 0.5 ppm max
    • Hydrogen sulfide: must be removed
    • Silica tolerance: less than 125 ppm, antiscalant should be considered for over 75 ppm
    • Turbidity: must be removed
    • Hardness: over 10 gpg should be softened
    • pH range: 3-11
    Water quality outside the above range will shorten the natural life of a membrane, large and small. Hence, source water is pretreated for large production RO systems where membranes are expensive and numerous. In contrast, it is seldom necessary to pretreat in smaller drinking/cooking RO models listed below with a production rate of, say, 100 GPD or less. The reason is that waste water is drained at 2-4 times the volume of RO water so that the membrane chamber is kept relatively clean. This kind of water wastage is not practical in large GPD RO systems.

    GPD (gallons per day) rating of a membrane is defined at 77 degrees Fahrenheit, 25 degrees Celcius, and at 60 psi differencial pressure between the source and permeate water. At lower source water temperatures, however, RO production decreases and the GPD rating has to be divided by a "derating factor" of 1.19 at 68F (20C), by 1.47 at 59F (15C), by 1.89 at 50F (10C), by 2.58 at 41F (5C). Pressure effect is less noticeable down to 45 psi or so, but production will drop precipitously below 40 psi. You need a booster pump then.       Top  

    Which impurities does an RO system reduce?

  • Sediment filter vastly reduces dirt, sand, rust particles and other sediments
  • Activated carbon is for aesthetic chlorine, odor and taste, nice compact reference: Home Water Purifiers & Filters
  • Reduction ratio table shows the percentage of the water borne substances reduced by a typical RO process


  • Under the sink RO system is equipped with auomatic shut-off valve. It senses when RO water storage tank is full, and shuts off the RO process. Water therefore is not wasted.

    How to test the purity of water? - pocket TDS monitor

  • TDS (totally dissolved solids) is a major indicator of water purity
  • Some are positively charged ions: Fe++, Cu++, Pb++, Ca++, Na+, Mg++, Ra++, Ba++
  • Some are negatively charged ions: OH-, CO3-, Cl-, HCO3-, SO4--, HSiO3-
  • TDS monitor measures electrical conductivity due to all these current carrying ions
  • Higher the TDS reading in parts per million, dirtier the water
  • Model TDS-3 monitor from HM Digital is easy to operate, 200 plus hours on a battery
  • Measures TDS value and water temp separately
  • Size: 5.5" x 1.2" x 0.8", weight: 3.2 ounces, rugged, accurate, LCD digital readout
  • Change the RO membrane when the TDS value is high, say 200 or more
  • TDS-3  $44.95, shipping in the US included, extra for AK, HI and overseas
  • Why you may want to buy from us?  -  we save you from king size headaches and hassles

  • Hundreds of companies selling RO systems, from expensive to cheap, name brands to no-names
  • If not maintained regularly and properly, an RO unit quickly turns into a useless piece of junk
  • Almost every week we are rescuing orphaned owners and equipment abandoned by the original sellers
  • Free post sale support at installation, operation and maintenance will help keep the water tasting as day one
  • List only the makes/models delivering lasting value, price may not be the lowest but you get peace of mind
  •   Top  


    Aqua Bar® RO Water Dispenser
    Readily replaces delivered water dispenser, more convenient, sanitary and better quality water


    Oasis Aqua Bar®

    Regular price: $1,435
    Special price: $1,180
    Shipping in the US included
    AQB50-4 - 4 stage reverse osmosis water dispenser

    Benefits - certified to NSF/ANSI standards 42 and 53
  • Filtered and delicious water at a rate of 50 gallons per day, works with chlorinated or well water
  • Hot, room temperature and chilled water served from 3 separate faucets
  • Stands 13-1/2" wide, 16" deep and 43-1/2" high
  • Auto fill and shutoff, 4.8 gallon reservoir is always full, no water wasted
  • Simple installation, two 1/4" plastic lines, cold water inlet and waste water drain
  • Elegant, sturdy and easy to keep clean, suitable for homes and offices
  • Hydrotech RO model #1010-5101, California Dept Health Services Certificate # 99-1402


  • Operating cost
  • Replacements: 10" sediment cartridge, 10" carbon, 50 GPD membrane, 10" carbon post cartridge
  • Change sediment cartridge every 6 months, pre and post carbon every 12 months, membrane should last 2-4 years upon constant use
  • Replacement cost: sediment $28, pre-carbon $41, 50 GPD TFC RO membrane $135, capillary flow controller $18.50, post carbon $45, shipping/handling from OH is extra ($12 - $18)           Top  

  • Two Temperature Countertop RO Water Dispenser
    "Hot and cold" model and "Room temp & cold" model


    CTD25HC
    "hot & cold"




    Regular price: $1,070
    Special price: $938
    Shipping in the US included
    CTD25RC
    "room temp & cold"




    Regular price: $951
    Special price: $832
    Shipping in the US included
    Farris Genesis ROS4
    4 stage RO 50 GPD



    The unit generates RO water nearby
    can feed water chiller/ice maker
    included in the price

    Benefits
  • Filtered and delicious water at a rate of 50 GPD, generated by a separate 4 stage RO system installed nearby
  • Auto fill and shutoff, tank in the dispenser is always full
  • Works with chlorinated city water or well water, simple installation, review detail
  • Countertop dispenser stands 12" wide, 16-3/4" deep and 17-1/2" high
  • Elegant, sturdy and easy to keep clean, suitable for homes and offices
  • Undersink or basement water making: 3.2 gallon storage tank is 11" diam, 14" h, RO unit 16" w, 6" d, 16" h


  • Operating cost is modest
  • Replace the sediment every 6 months, pre and post carbon every 12 months, the membrane should last 2-4 years
  • Sediment $4.30, pre-carbon $18, 50 GPD RO $90, capillary $10, post carbon $16, shipping/handling extra ($12 - $18)
  • Available options - please call us toll free 888-928-3794 within US, 978-456-8372 from outside US

  • If space is limited under the sink, try Amtrol 2.5 gallon tank, 9" dia x 15" tall, the same system price
  • Amtrol 14 gal tank (instead of 3.2 gal) is $300 extra, shipping from IN additional, 16" diameter x 23" tall, 24 lbs empty
  • Amtrol 20 gal tnk (instead of 3.2 gal) is $500 extra, shipping from IN additional, 22" diameter x 30" tall, 61 lbs empty
  • Amtrol 44 gal ank (instead of 3.2 gal) is $1,100 extra, shipping from IN additional, 26" diameter x 48" tall, 123 lbs empty
  • Chrome faucet standard, $30 extra for designer colors,almond, black, gray, red, white, etc, $50 extra for all stainless
  • UV add-on $160 extra for 120 V/50-60 Hz, $180 for 200-220V/50-60Hz, factory assembled or easily added at home
  •   Top  


    Under-the-Sink RO Systems - pure, delicious and safe water gushes out 24/7
    Are you designing a new kitchen? Or remodeling the old one? One of these is a must feature!


    Who needs it and why?
  • Any home owner with some space under the sink, especially those who now buy bottled water
  • Getting RO water is as easy as opening the carton and doing simple plumbing
  • Clean, delicious and economical drinking/cooking water 24 hours right in your kitchen, also feeds water chiller and icemaker
  • Already costs less than bottled water in a year, gets progressively less since you only replace filter cartridges

  • When you buy from us
  • Maximum cost saving since individually tested unit comes to you factory direct
  • Free post-sale installation/maintenance support with diagrams, written instructions and live on-site phone assistance
  • Free, cordial and professional maintenance reminders for the life of the unit
  • Resist buying the cheapest on the net, it won't last, you generally get what you pay for

  • 5 stage filtration under the counter with 3.2 gallon tank

  • Works with chlorinated city water or individual well water
  • No electricity needed if source water has 40 psi or more, if less, use Gladiator with booster pump
  • Don't walk away, filtered water gushes out of the faucet, we use 3/8" tubing (not 1/4") in the delivery path
  • Standard 3.2 gallon tank is 11" diam, 14" high, and RO unit is 14" w, 7" d, 16" h for both models below
  • You can install if you are handy, plumber in about 3 hours, we provide diagrams/live phone assistance, detail
  • NSF/WQA approved, US made quality parts, 5-year warranty on the tank/faucet, 5 or 3 years on the system (see below)
  • Conqueror III RO


    Conqueror III from Challenger
  • Special sale price $399 for 25 gallons per day (GPD) unit, includes shipping in US
  • Five year factory warranty, made in US
  • Absolutely top-notch, each unit tested/logged before shipment, no chance for defects
  • Best quality water: replace sediment cartridge every 6 months, pre- and post-carbons every year, and RO membrane should last 2-6 years
  • Parts: sediment $4.30, pre carbon $18, 25 GPD membrane $80, waste flow control $10, in-line and post carbons $16 each, shipping/handling ($12 - $18) is extra
  • Industry standard design, can get replacement parts from a dozen different manufacturers
  • 35 GPD unit $409, 50 GPD $419, price includes US shipping, HI/AK and overseas more
  • FSHS Champion 5 RO


    Champion 5 from FSHS
  • Our FY'12 sales broke all our records since 1984, this is a thank you
  • Special sale price $299 for 50 GPD unit, includes shipping in US (regular price $369)
  • One year factory warranty, made in US
  • Best quality water among all the models: Replace the sediment every six months, pre- and post-carbons every year, and the membrane should last 2-5 years
  • Replacements: sediment $4.30, two pre carbons $18 each, 50 GPD membrane 90, waste flow $10, post carbon $18 S/H ($12 - $18) is extra
  • Industry standard design, replacement parts from a dozen different manufacturers
  • Available options - please call us toll free 888-928-3794 within US, 978-456-8372 from outside US
  • If space is limited under the sink, try Amtrol 2.5 gallon tank, 9" dia x 15" tall, the same system price
  • Amtrol 14 gal tank (instead of 3.2 gal) is $300 extra, shipping from IN additional, 16" diameter x 23" tall, 24 lbs empty
  • Amtrol 20 gal tnk (instead of 3.2 gal) is $500 extra, shipping from IN additional, 22" diameter x 30" tall, 61 lbs empty
  • Amtrol 44 gal ank (instead of 3.2 gal) is $1,100 extra, shipping from IN additional, 26" diameter x 48" tall, 123 lbs empty
  • Chrome faucet standard, $30 extra for designer colors,almond, black, gray, red, white, etc,extra for all stainless
  • UV stage $160 extra for 120 V/50-60 Hz, $180 for 200-220V/50-60Hz, factory assembled or easily added at home
  •   Top  

    5 stage filtration system with water pressure booster pump - for less than 40 psi source water

    Gladiator III RO with pump



    Gladiator II and Gladiator models also available
    all 10 year warranty

    Gladiator III from Challenger - 50 GPD nominal
  • Works with chlorinated city water or individual well water
  • Special sale price $499, includes shipping in the US
  • Absolutely top quality, each unit is individually tested and logged before shipment
  • Flow: 10" sediment prefilter, booster pump, 10" carbon prefilter, TFC RO membrane, 10" inline carbon post filter, 10" carbon post filter, auto fill/shutoff valve, long reach faucet
  • The tank is 11" diam and 14" h and the main unit is 16" w, 7" d, 17" h
  • You can install it if you are handy, a plumber in about two hours, review detail
  • Chrome faucet standard, $30 extra for designer color finish: almond, black, gray, red, white and more, $50 extra for all stainless faucet
  • UV addition - $160 120V/50-60Hz, $180 220V/50-60Hz, factory or easily at home
  • For higher GPD unit, bigger tank, please call toll free 888-928-3794 in US
  • Also for 4- and 3-stage Gladiators - call 978-456-8372 from outside US         Top  
  • Hydrotech-Canature Quick-Change RO, 4 stage undersink - brand new introduction!



    Latest innovation, cartridge change is tilt up and twist out
  • Special sale price $389 for 50 GPD unit, includes US shipping
  • Streamlined space age look, RO unit 14-1/2" wide, 4-1/2" deep, 13-1/2" high
  • 3.2 gallon capacity tank 11" diameter x 14" tall, 2.6 gal effective draw
  • Well water or chlorinated city water, no electricity required
  • Water Quality Association Gold Seal ?ENSF/ANSI 58 Certified
  • Sediment, block pre-carbon, TFC RO membrane, granular powder post carbon
  • Three year factory warranty, made in US
  • You can tee off to multiple faucets, ice maker, water chiller
  • Installation is simple

  • Water intake and waste 1/4" tubing, pure water delivery to faucet 3/8"
  • Follow installation instruction, weekend project for you, a pro in 2-3 hours
  • If needed we can offer additional material and/or live phone assistance
  • Running cost

  • Sediment cartridge $51, pre-carbon $54, 50 GPD membrane $64, post-carbon $55, S/H from IL is extra
  • Typical maintenance - replace sediment, pre- and post carbon every 1-2 years, then membrane often lasts 2-7 years
  • Available options - please call us toll free 888-928-3794 within US, 978-456-8372 from outside US

  • If space is limited under the sink, try Amtrol 2.5 gallon tank, 9" dia x 15" tall, the same system price
  • Amtrol 14 gal tank (instead of 3.2 gal) is $300 extra, shipping from IN additional, 16" diameter x 23" tall, 24 lbs empty
  • Amtrol 20 gal tnk (instead of 3.2 gal) is $500 extra, shipping from IN additional, 22" diameter x 30" tall, 61 lbs empty
  • Amtrol 44 gal ank (instead of 3.2 gal) is $1,100 extra, shipping from IN additional, 26" diameter x 48" tall, 123 lbs empty
  • Chrome faucet standard, $30 extra for designer colors,almond, black, gray, red, white, etc,extra for all stainless
  • UV stage $160 extra for 120 V/50-60 Hz, $180 for 200-220V/50-60Hz, factory assembled or easily added at home
  •   Top  

    Culligan-Hydrotech QC-RO, 4 stage undersink with booster pump - for less than 40 psi source water

    Culligan QC 4-stage RO

    Kemflo booster pump kit

    Integration of Kemflo booster pump to QC-RO is literally a snap!
  • Consists of pump, tank pressure switch and 120 volts 50/60 hz transformer
  • Pump adds pressure to supply water, tank switch shuts it off when tank is full
  • Anyone can assemble, tubing and coupling supplied, pump can be anywhere
  • Special sale price $529, includes shipping in the US          Top  
  • Culligan-Hydrotech Quick-Pull-Down RO, 3 stage undersink - time-tested, reliable, efficient



    10+ yrs in the field, cartridge change is rotate, pull down
  • Special sale price $339 for 50 GPD unit, includes US shipping
  • Compact space age look, RO unit 9" wide, 4-1/2" deep, 13-1/2" high
  • 3.2 gallon capacity tank 11" diameter x 14" tall, 2.6 gal effective draw
  • Well water or chlorinated city water, no electricity required
  • Water Quality Association Gold Seal ?ENSF/ANSI 58 Certified
  • Special sediment/carbon pre-filter, TFC RO membrane, post carbon
  • Three year factory warranty, made in US
  • You can tee off to multiple faucets, ice maker, water chiller
  • Installation is simple

  • Water intake and waste 1/4" tubing, pure water delivery to faucet 3/8"
  • Weekend project for you, a pro in 2-3 hours, refer to installation
  • If needed we can offer additional material and/or live phone assistance
  • Running cost

  • Dual-purpose ediment/carbon $29, 50 GPD membrane $99, post carbon $23, S/H from IN is extra
  • Typical maintenance: replace sediment, pre- and post carbon every 1-2 years, then membrane should go 2-7 years

  • Portable Filters
    Small, convenient, effective, but hooking it up could be a challenge while you are traveling

    Diverter valve


    Deluxe Traveler - 3 stage portable reverse osmosis filter

    Benefits of the portable RO
  • Three (3) stage RO unit, pre-carbon, TFC RO membrane, post-carbon
  • stainless diverter valve lets you connect to faucets
  • Caution: Not all hotel faucets are compatible

  • This model unit
  • Works with either chlorinated city water or well water, read how to hook up diverter valve
  • The unit bundles up into a triangular profile cylindrical package of 5" base, 5" height, 14" long, 7 lbs
  • Deluxe Traveler - 3 stage RO


  • RO water production rate of 50 gallons per day, or 2 gallons per hour
  • 10" pre-carbon, 50 GPD TFC RO membrane, capillary, 10" post-carbon
  • Special sale price $180, includes shipping in the US
  • UV addition - 120V/50-60Hz is $140 plus shipping ($14 - $22), 220V/50-60Hz is $160 plus shipping

  • Replacement parts and cost
  • Pre- and post-carbons with Jaco couplers $18 each, 50 GPD TFC membrane $90, capillary waste controller $10, shipping from CA extra ($14 - $22)
  • Traveler - 1 stage activated carbon/KDF countertop filter (non-RO)

    Single stage non-RO filter


  • Works with chlorinated city water or well water
  • Consists of 10" cartridge of activated carbon combined with KDF
  • Activated carbon tackles chlorine, odor and taste
  • Filters water at a rate of approximately 1 gallons per minute
  • The unit is 4.5" diam, 13" h, travels well
  • Special sale price $70 includes shipping in the US
  • Replace approx. every 6 months: 10" carbon plus KDF, $30, shipping/handling is extra ($12 - $18)
  •   Top  


    Ultra Violet (UV) Stage Add-On
    Factory assembled or easily done at home


    Ultraviolet (UV) filter for our standard under-the-sink, countertop and portable RO filters

    UV stage add-on to RO

  • Benefit of UV Alabama Water Quality Program, May '03
  • Recommended for warmer climate


  • Complete unit - a reusable ballast transformer and a disposable UV lamp
  • Special price $140 for 110/120 volt AC, 50/60 Hz
  • Special price $160 for 200/230 volt AC, 50/60 hz
  • Disposable 6 watt lamp, 2.5" diameter x 13" length, 1 gallon per minute
  • NSF/WQA approved
  • Operating cost
  • Replaceable UV lamp rated for 1 year upon constant use, factory warranty
  • Replacement lamp: $100 , shipping from CA to you is extra ($12 - $18)                       Top  

  • Conqueror/Gladiator/Quick-Change/DT System Specifications
    Click for impurity rejection ratio


    Storage tank capacity
    3.2 gallons for Conqueror/Gladiator, different size tanks also available
    1.0 gallon for Countertop 465
    Size
    14" w, 7" d, 17" h for Conq./Glad. main unit, 12" diam and 14" h for tank
    11" w, 9" d, 15" h for Countertop 465
    Feed water pressure
    40-100 psi for Conquerors/countertops without pump
    5-100 psi for Gladiator/countertops with pump
       Feed water temperature   
    40-80F or 4-25C
    Feed water pH range
    3 minimum, 9 maximum
    Total dissolved solids
    Maximum 1,200 p.p.m.
    RO water recovery
    20-25%, excellent membrane protection
    Rejection ratio
    Click for details
    Pre-filter
    5 micron sediment and/or activated carbon block, 10" long
    Post-filter
    5 micron granular activated carbon, 10" long
    In-line filter
    5 micron granular activated carbon, 10" long
    RO membrane
       CTA (cellulose tri-acetate) for chlorinated water   
    TFC (thin film composite) for well water
    Daily RO water
    production capacity
    5-7 gal/day min., 20 gpd max. for CTA RO
    10 gal/day min., 100 gpd max. for TFC RO

      Top  


    Dr. Iwasa & wife Alice
    Whole house water filter, factory direct delivery, full warranty, competitive pricing, home water filter
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    PureWaterExpress.com (we speak English and Japanese)
    P.O. Box 47, Harvard, MA 01451, founded in 1984, same location since
    888-928-3794 within US,   978-456-8372 from outside US
    Japanese website www.jousuisouchi.com


    Copyright 1999: Prosperity Management, Inc., Massachusetts Corporation