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– RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4″ Tank Ball Valve

Original price was: $74.99.Current price is: $59.99.

– RO Water Filtration System Expansion Tank – 6 Gallon Water Tank -– Compact Reverse Osmosis Water Storage Pressure Tank with Free 1/4″ Tank Ball Valve
Price: $74.99 - $59.99
(as of May 01, 2025 16:21:15 UTC – Details)

From the brand

Learn more about Express WaterLearn more about Express Water

The freshest, cleanest water

Have the best water for your house with Express Water’s reverse osmosis and whole house systems!

For all your filtration needs

Express Water offers replacement filters and filter sets suitable for many reverse osmosis and whole house systems.

Express Water is proud to commit to funding 100% of a brand new clean water project every year.Express Water is proud to commit to funding 100% of a brand new clean water project every year.

Let’s make history together

Express Water is proud to be a charity: water supporter. 100% of public donations go directly to clean water projects.

Express Water Products

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. The perfect addition to any 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.
Durable Water Storage Tank: This RO water tank is rigorously tested for quality and durability and includes a 1-year warranty.
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 (17.5 x 12 x 12) to fit under most kitchen sinks. Stores up to 4.4 gallons of water for on-demand filtered drinking water.

Customers say

Customers find the expansion tank to be an excellent replacement, with positive feedback about its functionality, water capacity (filling a 5-gallon bucket), and ease of installation. Moreover, they appreciate the water pressure, with one customer noting it can run a gallon or more without pressure drop, and the tank’s durability. However, there are mixed experiences with leakage, with some reporting no leaks while others experienced membrane leaks after two years. Taste is also a concern, with some customers noting a rubber and goop taste.

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