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The system includes a ro pure reverse osmosis module with four pre-installed filters; a parts bag; a chrome, air-gap faucet, and 3 gallon storage tank giving you crystal clear, high-quality, monitored, top-mount, and great-tasting drinking water.

Water tank dimensions: this compact water tank is designed 14 x 9 x 9 to fit under most kitchen sinks. High quality water tank: this water storage tank is made from durable deep-drawn steel domes with precision welding to ensure long lasting value for your RO water system.


Easy to install water tank: ro tank replacements include free tank ball valve for easy set-up and replacement with 1⁄4” quick connect design. Reverse osmosis tank: made from 100% food grade materials, this RO water tank stores and keeps your water free from any impurities and harsh chemicals.


Customizable ro water filter system: express water home water filtration systems are fully upgradable and customizable with quick connecting fittings. Leak detection: each under sink water filter includes an emergency leak stop detector that shuts off water flow when it detects unwelcomed moisture.
99% of lead, nitrates, chlorine, Calcium, Fluoride, Arsenic, and more. On demand support: support from experts who can answer any of your questions about your new water filter. Try additional filtration attachments including UV Water Filter, Deionization Water Filter, Alkaline Water Filter, and more. Help has arrived - support from experts who can answer any of your questions about your home’s water. All our water filters are specially engineered to work together, producing the safest and best tasting water you’ll ever drink.

All our water filters are specially engineered to work together, producing the safest and best tasting water you’ll ever drink. Under sink water filter system: no need to mess with refilling or activating your water filter, Express Water’s water filtration systems automatically fill your water tank with high quality drinking water.
Water purification system: drink the healthiest water on Earth. On demand support: support from experts who can answer any of your questions about your new water filter. Express water’s quick and easy-to-understand design means you can install and understand everything about your new water filtration system. Customizable ro water filter system: express water home water filtration systems are fully upgradable and customizable with quick connecting fittings.

1. APEC Water Systems
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APEC Water Systems TANK-4 4 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank,White
#adAPEC Water Systems #ad - Food grade bladder and certified to ensure quality, safety and durability. Pre-pressurized 4 gallon water storage tank holds up to 3.More information #ad
2 gallon of water. Special designed for ro application. Discharge efficiently in a vertical or horizontal position with tank stand. Inlet/outlet connection: 1/4 inch male pipe thread.Brand | APEC Water Systems #ad |
Manufacturer | APEC Water Systems #ad |
Height | 14.5 Inches |
Length | 11 Inches |
Weight | 1.98 Pounds |
Width | 11 Inches |
Part Number | TANK-4 |
Model | TANK-4 |
More information #ad
2. iSpring
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ISpring T55M 5.5 Gallon Residential Pre-Pressurized Water Storage Tank for Reverse Osmosis RO Systems , White
#adiSpring #ad - Pre-pressurized between 7-10 psi for common use. 5. 5 gallon metal pressurized tank. Stainless steel 1/4" NPT valve thread, Ball Valve Included.More information #ad
Made from food grade butyl diaphragm with post-cure procedures provides a tasteless and odorless water chamber. Discharges effectively in both vertical and horizontal position.Brand | iSpring #ad |
Manufacturer | iSpring Water Systems #ad |
Height | 12 Inches |
Length | 17 Inches |
Weight | 9 Pounds |
Width | 12 Inches |
Part Number | T55M |
Model | T55M |
More information #ad
3. Watts Premier
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Standard, Watts Premier WP531411 RO Pure Reverse Osmosis Filtration System with Top-Mount, Air-Gap Faucet, Chrome
#adWatts Premier #ad - This space-saving, compact design allows this system to fit comfortably under your sink, requires fewer tube connections, includes back-flow prevention valves installed between the elements and cartridges have double O-rings so they won't leak. Four stage filtration: sediment pre-filter wp105351 reduces dirt, silt; carbon pre-filterwp105351 reduces chlorine taste and odors; the 50 GPD membrane WP105331 reduces TDS, benzene, copper, atrazine, arsenic, and lead; the carbon post-filterWP105381 reduces chemicals like MTBE's, chromium, and lindane.More information #ad
Maximum operating pressure is 80 psi and to maintain top performance replace sediment and carbon pre-filters every 6 months, post carbon filter every 12 months, and the membrane every 2 to 5 years. The easy, quick-change push release filter system allows for easy filter change with no need to shut off the water source, is installed with check valves in the filter lid between cartridges to prevent back-flow and shut off valves in each filter head that shuts off the water flow when cartridges are removed. The system includes a ro pure reverse osmosis module with four pre-installed filters; a parts bag; a chrome, air-gap faucet, and 3 gallon storage tank giving you crystal clear, high-quality, monitored, top-mount, and great-tasting drinking water.
Brand | Watts Premier #ad |
Manufacturer | Watts #ad |
Height | 15 Inches |
Length | 14 Inches |
Weight | 16 Pounds |
Width | 15 Inches |
Part Number | 531411 |
Model | WP531411 |
Warranty | 1 year |
More information #ad
4. tankRo
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TankRO – RO Water Filtration System Expansion Tank – 3 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve
#adtankRo #ad - Durable water storage tank: this RO water tank is rigorously tested for quality and durability and includes a 1-year warranty. The perfect addition to any RO water system.Water tank dimensions: this compact water tank is designed 14 x 9 x 9 to fit under most kitchen sinks. High quality water tank: this water storage tank is made from durable deep-drawn steel domes with precision welding to ensure long lasting value for your RO water system.
More information #ad
Reverse osmosis tank: made from 100% food grade materials, this RO water tank stores and keeps your water free from any impurities and harsh chemicals. Stores up to 2. 2 gallons of water for on-demand filtered drinking water. Easy to install water tank: ro tank replacements include free tank ball valve for easy set-up and replacement with 1⁄4” quick connect design.Brand | tankRo #ad |
Manufacturer | tankRo #ad |
Height | 14 Inches |
Length | 9 Inches |
Weight | 6 Pounds |
Width | 9 Inches |
Part Number | GTS3 |
Model | GTS3 |
More information #ad
5. APEC Water Systems
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White, APEC Water Systems TANK-3 3 Gallon Residential Pre-Pressurized Reverse Osmosis Water Storage Tank
#adAPEC Water Systems #ad - 4 gallon of water. Special designed for ro application. Discharge efficiently in a vertical or horizontal position with tank stand.More information #ad
Inlet/outlet connection: 1/4 inch male pipe thread. Pre-pressurized 3 gallon water storage tank holds up to 2. Food grade bladder to ensure quality, safety and durability.Brand | APEC Water Systems #ad |
Manufacturer | APEC Water Systems #ad |
Height | 14.5 Inches |
Length | 9.5 Inches |
Weight | 2 Pounds |
Width | 9.5 Inches |
Part Number | TANK-3 |
Model | TANK-3 |
More information #ad
6. tankRo
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TankRO – RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4" Tank Ball Valve
#adtankRo #ad - Durable water storage tank: this RO water tank is rigorously tested for quality and durability and includes a 1-year warranty. Stores up to 4. 4 gallons of water for on-demand filtered drinking water.Easy to install water tank: ro tank replacements include free tank ball valve for easy set-up and replacement with 1⁄4” quick connect design. Reverse osmosis tank: made from 100% food grade materials, this RO water tank stores and keeps your water free from any impurities and harsh chemicals.
More information #ad
High quality water tank: this water storage tank is made from durable deep-drawn steel domes with precision welding to ensure long lasting value for your RO water system. The perfect addition to any RO water system. Water tank dimensions: this compact water tank is designed 17. 5 x 12 x 12 to fit under most kitchen sinks.Brand | tankRo #ad |
Manufacturer | tankRo #ad |
Height | 12 Inches |
Length | 17.5 Inches |
Weight | 11 Pounds |
Width | 12 Inches |
Part Number | GTS6 |
Model | GTS6 |
More information #ad
7. Watts Premier
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Top-Mount Twist Faucet, Watts Premier 531417 RO Pure Plus VOC Reverse Osmosis w/Brushed Nickel
#adWatts Premier #ad - The filters snap out and are easily inserted. Certified to nsf/ansI 372 Lead Free. Certified by WQA. Certified to nsf/ansi 58 Certified Reverse Osmosis Units. The ro-pure plus reverse osmosis filtration system was designed with you in mind, compact design that allows this system to fit under your sink with minimal space requirements, with a space saving, and with a 3 gallon storage tank you will have enough water for your daily use.More information #ad
Changing the filters is as easy as pushing a button! With the built in shut off valve when removing the filters there is no mess like traditional models.Brand | Watts Premier #ad |
Manufacturer | Watts #ad |
Height | 15 Inches |
Length | 15 Inches |
Weight | 16.63 Pounds |
Width | 14 Inches |
Part Number | WP531417 |
Model | WP531417 |
Warranty | 1 year |
More information #ad
8. EXPRESS WATER
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Express Water RO5DX Reverse Osmosis Filtration NSF Certified 5 Stage RO System with Faucet and Tank – Under Sink Water Plus 4 Filters – 50 GPD, White, 14 x 15 x 5
#adEXPRESS WATER #ad - Under sink water filter: don’t waste money on professional installation. Water purification system: drink the healthiest water on Earth. Love your water - environmentally friendly coconut carbon filters give unequalled quality and a clear natural taste. Express water’s quick and easy-to-understand design means you can install and understand everything about your new water filtration system.Customizable ro water filter system: express water home water filtration systems are fully upgradable and customizable with quick connecting fittings. Leak detection: each under sink water filter includes an emergency leak stop detector that shuts off water flow when it detects unwelcomed moisture.
More information #ad
Under sink water filter system: no need to mess with refilling or activating your water filter, Express Water’s water filtration systems automatically fill your water tank with high quality drinking water. Reverse osmosis water filter: experience what water should taste like with the Express Water reverse osmosis water filtration system reducing up to 99. 99% of lead, nitrates, chlorine, Calcium, Fluoride, Arsenic, and more. On demand support: support from experts who can answer any of your questions about your new water filter. Try additional filtration attachments including UV Water Filter, Deionization Water Filter, Alkaline Water Filter, and more. Help has arrived - support from experts who can answer any of your questions about your home’s water. All our water filters are specially engineered to work together, producing the safest and best tasting water you’ll ever drink.
Brand | EXPRESS WATER #ad |
Manufacturer | Express Water #ad |
Height | 15 Inches |
Length | 14 Inches |
Weight | 31 Pounds |
Width | 5 Inches |
Part Number | RO5DX |
Model | RO5DX |
More information #ad
9. EXPRESS WATER
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Express Water RO10MX Reverse Osmosis Water Filtration System – 5 Stage RO Water Filter System with Faucet and Tank – Under Sink Water Filter – Plus 4 Replacement Filters – 100 GPD
#adEXPRESS WATER #ad - Reverse osmosis water filter: experience what water should taste like with the Express Water reverse osmosis water filtration system filtering up to 99. 99% of lead, nitrates, chlorine, Calcium, Arsenic, Fluoride, and more. Under sink water filter: don’t waste money on professional installation.All our water filters are specially engineered to work together, producing the safest and best tasting water you’ll ever drink. Under sink water filter system: no need to mess with refilling or activating your water filter, Express Water’s water filtration systems automatically fill your water tank with high quality drinking water.
More information #ad
Try additional filtration attachments including UV Water Filter, Alkaline Water Filter, Deionization Water Filter, and more. Leak detection: each under sink water filter includes an emergency leak stop detector that shuts off water flow when it detects unwelcomed moisture. Water purification system: drink the healthiest water on Earth. On demand support: support from experts who can answer any of your questions about your new water filter. Express water’s quick and easy-to-understand design means you can install and understand everything about your new water filtration system. Customizable ro water filter system: express water home water filtration systems are fully upgradable and customizable with quick connecting fittings.
Brand | EXPRESS WATER #ad |
Manufacturer | Express Water Incorporated #ad |
Height | 5 Inches |
Length | 15 Inches |
Width | 14 Inches |
Part Number | RO10MX |
Model | RO10** |
More information #ad
10. Max Water
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Reverse Osmosis Pressurized Water Storage Tank 4.4 Gallon PA-E RO-132 + Valve
#adMax Water #ad - Ltd. 1/4" stainless steel connection built for Reverse Osmosis water storage tank, pump tank & thermal tank applications. Model # ro-132 from pa-e Machinery Co.More information #ad
Dimension: approx 14" Height, 11" Diameter. Model: 105006~105137, package includes tank, tank holding bracket, and tank ball valve. 100 psi max working Pressure.Brand | Max Water #ad |
Manufacturer | Max Water #ad |
Height | 14 Inches |
Length | 10 Inches |
Weight | 8 Pounds |
Width | 10 Inches |
Part Number | 105006~105137 |
More information #ad