Express Water

4 Gallon Tank

161 reviews

SKU# RO132

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• KEEP YOUR WATER HEALTHY - This tank is made from 100% food grade materials with a post cured diaphragm to ensure there are no chemicals in your water
• FREE TANK VALVE - Free tank valve included, designed for 1/4" quick connect setup
• CERTIFIED QUALITY - This tank is NSF certified and we include a 1 year and every tank is tested at multiple stages to make sure it will last
• COUNT ON YOUR TANK - Heavy duty commercial construction with durable deep drawn steel domes and precision welded seams
• WHERE YOU NEED IT - Compact 15 x 12 x 12 size fits under most kitchen sinks
• WHEN YOU NEED IT - 3.2 gallon storage gives you water on-demand

The 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. The Tank is durability tested at several stages and is backed with a one year warranty. 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.
Customer Reviews
4.8 Based on 161 Reviews
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United States

Didn't even need it.

It never came out of the box. I was able to add air to the current one and it works fine, so in the box it sits.


Easy replacement

The delivery was quick, replacement of my old tank was easy, and the cost was great. Thank you!

Brenda J.


I am so glad I purchased this tank! It was super easy to replace my old tank with this much larger tank. Water pressure is great and my system runs like brand new! Thank you so much!!

Eric K.

Works Great!

Perfect replacement for my original tank. Shipping was quick and tank arrived well packaged. Super easy to switch out my old tank, which had a leaking bladder. Our RO system now works like it did brand new.

frank m.

ro tank

first order was lost at fedex. a new tank was shipped as soon as I e-mailed them. arrived in 3 days. I'm very happy with the service dept. tank is working well