Large selection of replacement water filters, reverse osmosis membranes, testing kits and water filter system repair parts. From one water filter or membrane to case quantity discounts.

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Reo-Pure Commercial Reverse Osmosis Water Filters

Reo-Pure Commercial Reverse Osmosis Water Filters

Reo-Pure LP-25, LP-50, LP-75, LP-100, LP-200, LP-400 and LP-600 Light Commerical Series Compatible Reverse Osmosis System Replacement Water Filters, Reverse Osmosis Membranes, DIY Replacement Parts and HELP Guides

 


REO-PURE LP-25, LP-50, LP-75, LP-100, LP-200, LP-400 and LP-600 LIGHT COMMERCIAL SERIES
REO-PURE LE SERIES RO SYSTEM
REO-PURE LP3 SERIES RO SYSTEM: 50-1,750 GPD MODELS
REO-PURE BLS SERIES RO SYSTEM: 00-18000 GPD MODELS
REO-PURE WMS SERIES 400-6000 GPD MODELS

 

  1. Pentek GAC-10 # 155109 GAC10 Taste & Odor Replacement Water Filter Cartridge
    Pentek GAC-10 # 155109 GAC10 Taste & Odor Replacement Water Filter Cartridge

    Pentek GAC-10 # 155109 GAC10 Taste & Odor Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands Granular Activated Carbon Taste & Odor Water Filter. 9 3/4" long X 2 7/8" diameter. 12 per case, sold individually. Ametek # 155109 GAC Series cartridges effectively reduce unwanted tastes, odors and chlorine from your drinking water. They are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. 

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    $19.99 Special Price $11.99 As low as $9.99
  2. Pentek EPM-10 # 155634 EPM10 Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-10 # 155634 EPM10 Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-10 # 155634 EPM10 Carbon Block Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Carbon Block 10 Micron Water Filter. 9 3/4" long X 2 7/8" diameter. 12 per case, sold individually. Ametek # 155634 EPM Series cartridges are a modified version of our "EP Series" cartridge. An economical price makes this cartridge suitable for taste, odor and chlorine reduction, as well as sediment filtration. EPM Series cartridges are manufactured using a patented process that yields a cartridge with a nominal 10 micron filtration rating, high porosity and greater chlorine removal capacity. The high porosity design helps prevent the cartridge from plugging before its adsorption capability is exhausted, maximizing the utilization of the carbon while maintaining low pressure drop. Order a case and save even more.
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    $16.99 Special Price $11.99 As low as $9.95
  3. Pentek GAC-20 # 155111 GAC20 GAC Carbon Replacement Water Filter Cartridge
    Pentek GAC-20 # 155111 GAC20 GAC Carbon Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek GAC-20 # 155111 GAC20 GAC Carbon Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Granular Activated Carbon Water Filter. 20" long X 2 7/8" diameter. 6 per case, sold individually. Ametek # 155111 GAC Series cartridges effectively reduce unwanted tastes, odors and chlorine from your drinking water. They are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. The construction of the cartridge allows water to enter at one end and pass through the entire length of the cartridge, while an internal expansion pad minimizes channeling or bypass. Before the water exits the cartridge, a 20-micron post filter helps remove carbon fines and other suspended particles from the filtered water. Order a case and save even more.
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    $33.99 Special Price $24.99 As low as $19.99
  4. Pentek EPM-20 # 155635 EPM20 Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-20 # 155635 EPM20 Carbon Block Replacement Water Filter Cartridge

    Pentek EPM-20 # 155635 EPM20 Carbon Block Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. 10 Micron Carbon Block Water Filter. 20" long X 2 1/2" diameter. 6 per case, sold individually. Ametek # 155635 EPM Series cartridges are a modified version of our "EP Series" cartridge.  EPM Series cartridges are manufactured using a patented process that yields a cartridge with a nominal 10 micron filtration rating, high porosity and greater chlorine removal capacity. Order a case of 12 and save even more.

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    $26.99 Special Price $19.99 As low as $16.99
  5. Pentek DGD-5005 # 155357 Big Blue 5 Micron Replacement Sediment Water Filter Cartridge
    Pentek DGD-5005 # 155357 Big Blue 5 Micron Replacement Sediment Water Filter Cartridge
    Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands Big Blue 5 Micron Dual Gradient Polypropylene Sediment Water Filter. 10" long X 4 1/2" diameter. 8 per case, sold individually. Ametek # 155357 DGD Series is manufactured from 100% pure polypropylene fibers and are sized for use in our Big Blue® filter housings. They are designed for purity and will not impart taste, odor or color to the liquid being filtered. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The DGD Series advanced design combines selective "final filtration" with appropriate "pre-filtration." The larger diameter of the pre-filter, prefilter, pre filter reduces the particle load to the post filter, allowing it to operate at higher velocities. This increased depth provides for very high particulate reduction efficiencies and loading capacities. Order a case and save even more.
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    $24.99 Special Price $17.99 As low as $13.99
  6. Pentek DGD-7525 # 155355 Big Blue 25 Micron Replacement Sediment Water Filter Cartridge
    Pentek DGD-7525 # 155355 Big Blue 25 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek DGD-7525 # 155355 Big Blue 25 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 25 Micron Dual Gradient Polypropylene Sediment Water Filter. 10" long X 4 1/2" diameter. 8 per case, sold individually. Ametek # 155355 DGD Series is manufactured from 100% pure polypropylene fibers and are sized for use in our Big Blue® filter housings. They are designed for purity and will not impart taste, odor or color to the liquid being filtered. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The DGD Series advanced design combines selective "final filtration" with appropriate "pre-filtration." The larger diameter of the pre-filter reduces the particle load to the post filter, allowing it to operate at higher velocities. This increased depth provides for very high particulate reduction efficiencies and loading capacities. Order a case and save even more.
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    $24.99 Special Price $18.99 As low as $13.99
  7. Pentek GAC-BB # 155153 GACBB Big Blue GAC Carbon Replacement Water Filter Cartridge
    Pentek GAC-BB # 155153 GACBB Big Blue GAC Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek GAC-BB # 155153 GACBB Big Blue GAC Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue Granular Activated Carbon Water Filter. 10" long X 4 1/2" diameter. 8 per case, sold individually. Ametek # 155153 GAC Series cartridges effectively reduce unwanted tastes, odors and chlorine from your drinking water. They are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. The construction of the cartridge allows water to enter at one end and pass through the entire length of the cartridge, while an internal expansion pad minimizes channeling or bypass. Before the water exits the cartridge, a 20-micron post filter helps remove carbon fines and other suspended particles from the filtered water. Order a case and save even more.
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    $47.99 Special Price $35.99 As low as $31.99
  8. Pentek EPM-BB # 155782 EPMBB Big Blue Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-BB # 155782 EPMBB Big Blue Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-BB # 155782 EPMBB Big Blue Carbon Block Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 10 Micron Carbon Block Water Filter. 10" long X 4 1/2" diameter. 4 per case, sold individually. Ametek # 155782 EPM Series cartridges are a modified version of our "EP Series" cartridge. An economical price makes this cartridge suitable for taste, odor and chlorine reduction, as well as sediment filtration. EPM Series cartridges are manufactured using a patented process that yields a cartridge with a nominal 10-micron filtration rating, high porosity and greater chlorine removal capacity. The high porosity design helps prevent the cartridge from plugging before its adsorption capability is exhausted, maximizing the utilization of the carbon while maintaining low pressure drop. Order a case and save even more.
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    $53.99 Special Price $39.99 As low as $34.99
  9. Pentek DGD-5005-20 # 155358 20 Inch Big Blue 5 Micron Replacement Sediment Water Filter Cartridge
    Pentek DGD-5005-20 # 155358 20 Inch Big Blue 5 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek DGD-5005-20 # 155358 20 Inch Big Blue 5 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 20" Dual Gradient 5 Micron Polypropylene Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155358 DGD Series is manufactured from 100% pure polypropylene fibers and are sized for use in our Big Blue® filter housings. They are designed for purity and will not impart taste, odor or color to the liquid being filtered. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The DGD Series advanced design combines selective "final filtration" with appropriate "pre-filtration." The larger diameter of the pre-filter reduces the particle load to the post filter, allowing it to operate at higher velocities. This increased depth provides for very high particulate reduction efficiencies and loading capacities. Order a case and save even more.
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    $38.99 Special Price $29.99 As low as $24.99
  10. Pentek DGD-7525-20 # 155356 20 Inch Big Blue 25 Micron Replacement Sediment Water Filter Cartridge
    Pentek DGD-7525-20 # 155356 20 Inch Big Blue 25 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek DGD-7525-20 # 155356 20 Inch Big Blue 25 Micron Sediment Water Filter Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. 20 Big Blue 20" 25 Micron Dual Gradient Polypropylene Sediment Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek #155356 DGD Series is manufactured from 100% pure polypropylene fibers and are sized for use in our Big Blue® filter housings. They are designed for purity and will not impart taste, odor or color to the liquid being filtered. Also, the polypropylene construction provides superior chemical resistance and is not prone to bacterial attack. The DGD Series advanced design combines selective "final filtration" with appropriate "pre-filtration." The larger diameter of the pre-filter reduces the particle load to the post filter, allowing it to operate at higher velocities. This increased depth provides for very high particulate reduction efficiencies and loading capacities. Order a case and save even more.
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    $38.99 Special Price $29.99 As low as $23.99
  11. Pentek GAC-20BB # 155249 GAC20BB Big Blue GAC Carbon Replacement Water Filter Cartridge
    Pentek GAC-20BB # 155249 GAC20BB Big Blue GAC Carbon Replacement Water Filter Cartridge
    Pentek GAC-20BB # 155249 GAC20BB Big Blue GAC Carbon Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue Granular Activated Carbon Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155249 GAC Series cartridges effectively reduce unwanted tastes, odors and chlorine from your drinking water. They are designed to allow maximum contact between the water and carbon, ensuring maximum adsorption. The construction of the cartridge allows water to enter at one end and pass through the entire length of the cartridge, while an internal expansion pad minimizes channeling or bypass. Before the water exits the cartridge, a 20 micron post filter helps remove carbon fines and other suspended particles from the filtered water. Order a case and save even more.
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    $89.99 Special Price $64.99 As low as $57.99
  12. Pentek EPM-20BB # 155783 EPM20BB Big Blue Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-20BB # 155783 EPM20BB Big Blue Carbon Block Replacement Water Filter Cartridge
    Pentek EPM-20BB # 155783 EPM20BB Big Blue Carbon Block Replacement Water Filter Cartridge Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. Big Blue 10 Micron Carbon Block Water Filter. 20" long X 4 1/2" diameter. 6 per case, sold individually. Ametek # 155783 EPM Series cartridges are a modified version of our "EP Series" cartridge. An economical price makes this cartridge suitable for taste, odor and chlorine reduction, as well as sediment filtration. EPM Series cartridges are manufactured using a patented process that yields a cartridge with a nominal 10 micron filtration rating, high porosity and greater chlorine removal capacity. The high porosity design helps prevent the cartridge from plugging before its adsorption capability is exhausted, maximizing the utilization of the carbon while maintaining low pressure drop. Order a case and save even more.
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    $83.99 Special Price $59.99 As low as $54.99
  13. Pro Products Sani System RO & Water Filtration System Sanitizer
    Pro Products Sani System RO & Water Filtration System Sanitizer
    Sani-System ® Pro Products is proud to introduce Sani-System, the first and only EPA product approved for sanitizing water softeners, RO units and Water Coolers. Alos NSF certified. Sani System is proven to kill 99.9% of E. coli, E. coli O157:H7, Staphylococcus aureus, Listeria monocytogenes and other harmful bacteria. It does not use chlorine, other oxidizers or acids that can harm water softener equipment parts. Use is simple; each dose comes in a pre-measured pouch. Just cut, pour and regenerate softener. No measuring, No mess! Sanitizing Equipment! Applications Interior Surfaces of Water Softeners, Reverse Osmosis (RO) Units, Ice Machines, Water Coolers, Water Holding Tanks and Pressure Tanks. Pro Products Sani System Sanitizer. 0.25 fl. oz. concentrate is perfect for your RO reverse osmosis drinking water system sanitizing..
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    $7.99 Special Price $4.99 As low as $2.99
  14. Pentek SW-1A # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench
    Pentek SW-1A # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench
    Pentek SW-1 # 150539 SW1 Slim Line Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. SW-1 Water Filter Housing Wrench. Fits 4" Slim Line Housings. (Slim Line Housings Have A 3 1/2" diameter "O" Ring) Ametek # 150294 Only for use in loosening filter housings, never to tighten. Overtightening may cause damage to the O-rings and make re-opening VERY difficult. Hand tighten only. Fits most standard style RO systems. Replaces 150294. For really stubborn filter housings our technicians will use two wrenches together for maximum power where one wrench might break or not do the job. Our techs know the tricks. Order New O-rings And Be Sure To Lube Them With Dow 111 Silicone Sealant To Prevent Leaks
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    $9.99 Special Price $6.99 As low as $4.99
  15. Pentek SW-2 # 150295 SW2 Standard Size Water Filter Housing Sump Spanner Wrench
    Pentek SW-2 # 150295 SW2 Standard Size Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek SW-2 # 150295 SW2 Standard Size Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. SW-2 Standard Size Water Filter Housing Wrench. Fits 4 3/4" Standard Size Filter Housings. (Standard Size Housings Use a 4" Diameter "O"Ring) Ametek # 150295 - Only for use in loosening filter housings, never to tighten. Overtightening may cause damage to the O-rings and make re-opening VERY difficult. Hand tighten only. For really stubborn filter housings our technicians will use two wrenches together for maximum power where one wrench might break or not do the job. Our techs know the tricks.
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    $9.99 Special Price $6.99 As low as $5.49
  16. Pentek SW-3 # 150296 SW3 Big Blue Water Filter Housing Sump Spanner Wrench
    Pentek SW-3 # 150296 SW3 Big Blue Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek SW-3 # 150296 SW3 Big Blue Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. SW-3 Big Blue 5 7/8" Water Filter Housing Wrench. (Big Blue Filter Housings Use A 5 3/4" Diameter "O"Ring) Ametek # 150296 Only for use in loosening filter housings, never to tighten. Overtightening may cause damage to the O-rings and make re-opening VERY difficult. Hand tighten only. For really stubborn filter housings our technicians will use two wrenches together for maximum power where one wrench might break or not do the job. Our techs know the tricks.
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    $12.99 Special Price $8.99 As low as $5.99
  17. PENTEK- Big Blue SW4 Water Filter Housing Sump Spanner Wrench -1000
    Pentek SW-4, SW4 Big Blue Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands
    Pentek SW-4, SW4 Big Blue Water Filter Housing Spanner Wrench Compatible With Culligan / Ametek / US Filter / Plymouth / Kleen Plus / American Plumber / Bruner & Many Other Brands. SW-4 Big Blue Water Filter Housing Wrench - For 20" Big Blue 5 7/8" Filter Housing Wrench. (Big Blue Filter Housings Use A 5 3/4" Diameter "O"Ring) Only for use in loosening filter housings, never to tighten. Overtightening may cause damage to the O-rings and make re-opening VERY difficult. Hand tighten only. For really stubborn filter housings our technicians will use two wrenches together for maximum power where one wrench might break or not do the job. Our techs know the tricks.
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    $12.99 Special Price $8.99 As low as $5.99
  18. Molykote-From DOw Corning- 111 Compound-6 Gram O-ring Silicone Lubricant & Sealant-Dow-111-5-gram-1000
    Dow Corning - Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - Be sure to lube your O-rings to help prevent leaks.
    Dow Corning/Molykote ® 111 6 gram O-ring Silicone Lubricant and Sealant - 6 gram pillow pack. (like a ketchup packet) Great O-ring sealant and lubricant. FDA and NSF approved. (Do Not Use Petroleum Jelly As It May Break Down O-rings Or Housings) This is the same premium grade silicone sealant and lubricant used in underwater photography cameras, scuba gear and other underwater applications that simply can't afford leaks. Why not use the best for your reverse osmosis or drinking water filtration system?

    Dow 111 Silicone MSDS Safety Sheet

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    $5.99 Special Price $3.99 As low as $1.79
  19. John Guest Super Speedfit Quick Connector - Male - Elbow
    John Guest ® Super Speedfit Quick Connector - Male - Elbow
    John Guest ® Super Speedfit Quick Connector - Male - Elbow - John Guest Super Speedfit Quick Connectors - Male - MNPT - Sold in pairs. Price is per pair. These fittings are manufactured in gray acetal copolymer with food grade nitrile ‘o’ ring, making them especially suitable for applications involving foodstuff and potable liquids like reverse osmosis drinking water. They are equally suitable for air and inert gasses and can therefore be used on CO2 lines, pneumatic applications, and vacuum. For more than a decade, John Guest has been supplying Super Speedfit fittings to the Water Purification market for drinking water applications in homes, restaurants and industry. John Guest products are listed with the WRC(UK), NSF(US) and SK(Germany). PI480821S , PI480822S , PI480823S , PI481222S , PI481223S
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    $8.99 Special Price $4.99 As low as $3.99
  20. Easy Tap Water Feed Valve for Water Filter Systems - 2000
    Easy Tap Water Feed Valve For Water Filter Systems 3/8" Feed Tube
    Easy Tap Water Feed Valve - High flow tap valve. Follow the pipe up from the shut-off valve toward faucet until you reach a coupling nut (may be all the way up to the faucet). Unscrew coupling nut. Screw brass easy tap onto previous location of coupling nut. Hand tighten and then one more complete turn with wrench. Re-attach water line coupling nut to easy tap. The valve on the side of the easy tap is the shut off valve for your new RO system. If the handle is turned clockwise all of the way, this is the "OFF" position for your new RO system. Counterclockwise all of the way is the "ON" position.
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    $16.99 Special Price $8.99 As low as $4.99
  21. TDS Meter Inline Water Tester DM1 - HM Digital Dual Mode Reading
    TDS Meter Inline Tester- Dual Mode Reading - Easily Installs Inline - Very Simple To Use
    TDS Meter - Dual Mode - Installs Inline - Check the TDS level with the push of a button. Now you can easily check to make sure the water from your reverse osmosis system is top quality. Measure the tap water coming in vs. the purified water going out of your system at any time. Very easy installation. FEATURES Displays TDS levels of the feed water and product water with in & out electrode probes. Highly efficient and accurate due to its advanced microprocessor technology. Auto-Off function conserves battery power. The unit shuts off automatically after 10 minutes of non-use. Comes equipped with John Guest Quick-Connect T-fittings as shown. Installs quickly and easily. SPECIFICATIONS Range: 0-9990 ppm Accuracy: ±2% Always know if your RO membrane is performing correctly!
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    $49.99 Special Price $39.99 As low as $19.99
  22. Aquatec CDP-8800 Booster Pump For RO Systems Over 50 GPM
    Aquatec ® CDP-8800 Booster Pump For RO Systems Over 50 GPM
    Aquatec ® CDP-8800 Booster Pump For RO Systems Over 50 GPD - CDP-8800 Series High Flow. 3/8" tube quick connectors built in. Order the optional reducers if you are using 1/4" O.D. tube. The CDP-8800 Series pumps are also compatible with most hydraulic shut-off valves with the optional PSW shut off tank controller switch. Distinguishing Features & Operating Benefits: Outstanding toughness, durability. Designed for 30,000+ operating hours. Adjustable pressure boost between 40-120 PSI. Outlet pressures up to 160 PSI. EMI/RFI electronic noise suppression. Extremely quiet operation, less than 45 DBA. Expels trapped air, eliminates air locks. Runs dry without damage. Pumphead can be mounted up or down. Self-priming, 60 inch lift. Improved venting system removes moisture. Low voltage (12-24VAC) for maximum safety. Corrosion resistant exterior. Technical Specifications: POWER: The CDP-8800 #8851-2J03-B424 Series pumps operate safely with low energy (24 watts), low voltage (12-24VAC) motors. They can be used with compatible transformers offered in the most popular worldwide voltages (120 VAC, 230 VAC). All transformers are optional and must be ordered separately. PSW tank switches are optional and must be ordered separately also.
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    $199.99 Special Price $149.99 As low as $134.99

Easy TDS Membrane Performance Calculator
See If It is Time To Replace Your Membrane

Simply enter your Feed Water TDS and RO Water TDS into the boxes above and click "Submit". The percentage of TDS Rejection will be displayed. We normally recommend membrane replacement once you drop below 75%. This may vary in areas with high TDS in the feed water.

See our selection of TDS meters under Water Tests



Be sure to check our Parts Department for important parts such as TDS Testers For Reverse Osmosis Membranes, Replacement Tanks, O-rings , Filter Housing Wrenches, Faucets, Pumps, Fittings, UV Systems and more parts for your reverse osmosis pure water filtration system.   View maintenance and servicing tips online at our Installation & Trouble shooting Guide.





* Reo-Pure is the registered trademark of Great Lakes International, the manufacturer of Reo-Pure brand of under counter drinking water system filtration equipment.  The replacement water filter cartridges, reverse osmosis membranes, water tanks, faucets and repair parts listed above are not manufactured or endorsed by Reo-Pure.  Rather, these replacement filters, RO reverse osmosis membranes and replacement parts are manufactured by other companies.  While these replacement water filters, repair parts and reverse osmosis membranes are compatible for use in Reo-Pure under counter reverse osmosis drinking water filtration equipment, we make no representation as to whether using these water filter cartridges, replacement parts and RO reverse osmosis membranes is consistent with the warranty and specifications applicable to Reo-Pure under sink drinking water system equipment.