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EXPRESS WATER

TankRo RO132-TNK, 4 Gallon Reverse Osmosis Water Storage Pressure Tank, Compact RO Water Filtration System Expansion (Packaging May Vary)

  • Based on 2,204 reviews
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Availability: Only 4 left in stock, order soon!
Fulfilled by Amazon
Arrives Tuesday, Jul 28
Order within 15 hours and 27 minutes
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Features

  • Reverse Osmosis Tank: Keeps your water free from any impurities and harsh chemicals. The perfect addition to any RO water system.
  • 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
  • Water Tank Dimensions: This compact water tank is designed (15 x 12 x 12) to fit under most kitchen sinks. Stores up to 3.2 gallons of water for on-demand filtered drinking water.
  • Built for Everyday Durabilty: Designed and tested to ensure reliable performance and long-lasting use

Description

The tankRO 4 Gallon Water Storage Tank gives tasteless, odorless, and contaminant free water. Get a quality tank you can rely on today. The post cured diaphragm means sterile water distribution to keep your water safe. The water reservoir can hold up to 3.2 gallons of water at once, with the rest of the storage area being occupied by the pre pressurized air bladder, which helps you draw water from the tank. This tank comes with a free Tank Ball Valve and a free Tank Stand. All components are NSF Certified. Designed to fit under sinks this water holding tank will fit most kitchen cabinets, it is made to work when lying on its side or upright. Maximum working pressure of the tank is 100 PSI. The tank is also designed to survive the outdoor elements with a two part epoxy primer and polyurethane paint finish. This is a fully functional pressure tank for water wells. The water accumulator chamber of the tank includes the highest grade of polypropylene, virgin polypropylene, meaning you have the most durable and smooth inside lining. This tank is built to last with heavy duty commercial construction with durable deep drawn steel domes and precision welded seams. Improve your water today.

Brand: EXPRESS WATER


Special Feature: Durability


Product Dimensions: 15"L x 12"W x 12"H


Material: Alloy Steel


Capacity: 4 Gallons


Included Components: 4-Gallon Water Storage Tank


Package Information: Tank


Installation Type: Under Sink


Purification Method: Reverse Osmosis


Power Source: Adapter


Other Special Features of the Product: Durability


Container Type: Tank


Installation Type: Under Sink


Purification Method: Reverse Osmosis


Power Source: Adapter


LowerTemperature Range: 33 Degrees Fahrenheit


Maximum Flow Rate: 0.8 Gallons Per Minute


Operating Pressure Range: 100 PSI


Upper Temperature Rating: 100 Degrees Fahrenheit


Supported Water TDS Level Maximum (PPM): 500


Smart Home Compatibility: Not Smart Home Compatible


Item Dimensions L x W x H: 15"L x 12"W x 12"H


Capacity: 4 Gallons


Item Weight: 7.3 Pounds


Material Type: Alloy Steel


Brand Name: EXPRESS WATER


Included Components: 4-Gallon Water Storage Tank


Model Name: V-RO132-TNK


Model Number: RO132-TNK


Warranty Description: 1-Year Warranty


UPC: 641990965834


Global Trade Identification Number: 34


Manufacturer: Express Water


Manufacture Year: 2022


Part Number: V-RO132-TNK


Unit Count: 1 Count


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jul 28

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Works perfectly
Great item. Company easy to work with
Reviewed in the United States on February 10, 2026 by Drew Geoghagan
    • Simple and works for good price
Simple hookup. Works great! Eliminated pulsing (on/off) of a tankless/pumped RO water filter system connected to fridge and coffee maker. Now I have good pressure at every fixture served by RO water filter system
Reviewed in the United States on November 3, 2025 by W
    • Works
Working as expected.
Reviewed in the United States on April 12, 2026 by Stan Zweigart
    • Reverse osmosis tank replacement
Great tank for my reverse osmosis under the sink filter system works fantastic
Reviewed in the United States on May 23, 2026 by Christine L. Ferretti
    • Easy install
Worked ok
Reviewed in the United States on April 16, 2026 by donny g.
    • Good quality tank
Note: THE TANK DOES NOT COME WITH A SHUT OFF VALVE THAT GOES AT THE TOP Good quality replacement for a good price. Amazon said it comes with a shut off valve, but it does not.
Reviewed in the United States on June 19, 2026 by Nilyek44
    • Easy installation, though curious about the manufacture date Easy installation, though curious about the manufacture date
Review Image by Castiel
I received the product today (April 29, 2026) and the installation was very straightforward. It seems to be working fine so far. However, I noticed the serial number starts with 2509, which makes me think it was manufactured in 2025. Given that I ordered it in 2026, I assume this is within the normal distribution timeframe for this type of product. Overall, I'm satisfied with the purchase. ... show more
Reviewed in the United States on April 30, 2026 Reviewed in the United States on April 30, 2026 by Castiel
    • Perfect replacement/upgrade
Works great, even better than the original glacier bay that came with my RO system.
Reviewed in the United States on January 12, 2026 by nm1169

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