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Customers who have purchased reverse osmosis water filter systems have also been:
to Cuno replacement filter cartridges - to filters for icemakers - to ultra violet countertop water filter systems - to water filter index
to water filter faucets - to Cuno filter cross reference chart - to Aqua-Pure water softeners - to Cuno filtered drinking water systems
to deluxe Cuno UV filter systems - to heavy duty high-flow filter systems - to TDS removal without water waste
to other brand RO water filter systems - to Cuno water filtration products - index

Simple, straightforward and low shipping rates for these water filter systems.

Aqua-Pure® Reverse Osmosis Drinking Water Systems


If you are looking for a water filtration system that provides you with clean, good tasting drinking water, this system is the solution. Clean, filtered drinking water can make all the difference in how your food tastes, and makes it easier to get those eight glasses a day. With all the worries in your day, isn't it nice not having to worry about what's in your drinking water as well?

Cuno® Model #AP-RO5500 - Reverse Osmosis Membrane Drinking Water System
AP-RO5500 Drinking Water System This Undercounter RO diaphragm Filter System Features:
  • Four stage five micron filtration process
    • Stage 1: five micron sediment & rust filtration
    • Stage 2: activated carbon filtration
    • Stage 3: reverse osmosis
    • Stage 4: final activated carbon polishing filtration
  • Production rate of 12 gallons per day
  • 2.4 gallon tank & 3/8" water/drain connections included
  • Conveniently Installs on the cold water line at the point-of-use
  • High flux, thin film composite RO membrane
  • Max water storage capacity: 2.4 gallons
  • Max water temperature: 100°F
  • Min water pressure: 40 PSI
  • Max water pressure: 100PSI
  • Inlet/Outlet size: 1/4" Inlet tubing x 3/8" outlet tubing
  • Includes AP5527 Pre and Post filter cartridges
  • Click here for replacement filter cartridges and membranes
  • Note: These units are not approved for use in California
Description Price & Quantity
#AP-RO5500 with faucet four stage water filtration system $468.48
#AP-RO5500LF less faucet four stage water filtration system $433.42

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Cuno® Drinking Replacement Filter Cartridges
Fits model AP-RO5500 filter systems
AP-55 Replacement Cartridge These Replacement Water Filter Cartridges Feature:
  • High capacity 2000 gallon 4 - 6 month filter capacity
  • Micron rating: 5 microns (Tip: The lower the micron rating the more particles the water filter will trap)
  • Flow Rate: 2 GPM max
  • Max Temperature: 100°F
  • Max Pressure: 100PSI
Description Price & Quantity
(1) #AP-5527 Pre and Post filter cartridges (pair) $85.05
(2) #AP-5500RM TFC membrane module (each) $139.60

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Sani-System RO Unit Sanitizer
an image of the reverse osmosis unit sanitizer
view larger image
Great reasons to use RO sanitizer:
  • Sanitizes the reverse osmosis system in only 60 seconds time
  • Will not leave an after-taste or smell when used as directed
  • Chlorine-free and non-corrosive
  • EPA and NSF Certified for a 99.99% kill rate
  • Easy to use single-dose packets
Get the job done fast with these conveniently easy-to-use, pre-measured sanitizing packets. When used as directed, Sani-System kills bacteria such as Staphylococcus aureus (Staph), Escherichia coli (E. coli) Listeria as well as many other micro-organisms that grow on the untreated surfaces of water quality equipment. This sanitizer eliminates odors while sanitizing tanks, lines and hoses. These sanitizers are a great way to help your system remain free and clear of bacteria growth, which in turn helps your mind stay free and clear of worrying about your water quality.
Reverse Osmosis Sanitizer Packet - 0.25 FL. OZ. = $3.47
Order 24 or more for Great Savings
Order 96 or more for Even Greater Savings

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Frequently Asked Questions

Q. "What is reverse osmosis filtration?"
A. A water filtration method used to remove most inorganic chemicals and suspended particulate from water. Water, under pressure, is forced through a semi-permeable membrane that removes molecules larger than the pores of the membrane.

Q. "What is a micron rating?"
A. The average size of the openings between pieces of the filter media are represented in microns. For example, a 40-micron filter has larger openings than a 5-micron filter. Consequently, the 40-micron filter element will let larger particles pass through the filter than the 5-micron element.

As a general rule, the smaller micron rating for a filter is better, but as with most everything, there is a trade-off. Flow capability usually drops off as the micron rating gets smaller. To overcome this, low micron-rating filters must have larger elements to keep from sacrificing precious flow.



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