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APEC TANK-14 14 Gallon Pre-pressurized Reverse Osmosis Water Storage Tank

  • Based on 328 reviews
Condition: New
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Availability: In Stock.
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Arrives Tuesday, Jun 16
Order within 10 hours and 33 minutes
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Size: 14 Gallons


Features

  • Pre-pressurized 14 Gallon Reverse Osmosis RO Water Storage Tank (holds up to 10.7 gallons of water)
  • Discharge efficiently in a vertical or horizontal position with tank stand.
  • Food grade bladder and NSF Certified to ensure quality, safety and durability
  • Upgrade for small 4 gal tanks- holds 3X more water with improved faucet delivery pressure
  • Larger 3/4 male NPT Inlet/Out connection for faster tank refills and flow rate

Description

Our 14 gallon reverse osmosis water storage tank offers high volume water storage for use with all APEC residential reverse osmosis systems and most brands of reverse osmosis systems. These durable metal tanks will deliver a continuous and stable supply of purified water at a fast flow rate with high volume suitable for average to large size families. Supported by fully enclosed polypropylene and butyl reservoirs, these storage tanks provide airtight protection against leaks. Their stainless steel connectors ensure leach-free integrity while post-cured diaphragms eliminate the possibility of odors from the tank. Individually pressure-tested for safety, all our tanks are certified and CE approved for materials quality, safety, and durability making them suitable for use anywhere in the world. Specifications: Dimensions: 15 3/8 inch D x 22 7/8 inch H Weight: 30 lbs Optional tank ball valve: 3/4 inch connection to 1/4 inch or 3/8 inch tube size (not included with the tank) APEC Water does not distribute or sell our products to any 3rd party sellers on Amazon. Please purchase genuine APEC Water products from Amazon or APEC Water directly for authenticity.

Brand: APEC WATER


Special Feature: Heavy Duty


Product Dimensions: 16"L x 16"W x 23"H


Material: Stainless Steel


Capacity: 14 Gallons


Included Components: TANK-14


Package Information: Stand


Installation Type: Under Sink


Purification Method: Reverse Osmosis


Model Name: TANK-14


Brand: ‎APEC WATER


Special Feature: ‎Heavy Duty


Product Dimensions: ‎16"L x 16"W x 23"H


Package Information: ‎Stand


Installation Type: ‎Under Sink


Model Name: ‎TANK-14


Supported Water TDS Level Maximum (PPM): ‎10


UPC: ‎854961005570


Global Trade Identification Number: ‎70


Manufacturer: ‎APEC WATER SYSTEMS


Part Number: ‎TANK-14-A


Item Weight: ‎22.5 pounds


Item model number: ‎TANK-14-A


Is Discontinued By Manufacturer: ‎No


Size: ‎14 Gallons


Color: ‎White


Style: ‎TANK-14


Pattern: ‎Filter


Item Package Quantity: ‎1


Special Features: ‎Heavy Duty


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: September 19, 2014


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Tuesday, Jun 16

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.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • Great little RO tank
Size: 4 Gallons
Works great, easy to install, I replaced a 10 year old tank that started leaking at the Schrader valve, this tank did the trick. Amazing volume of water before it starts to slow.
Reviewed in the United States on November 26, 2025 by Amazon Customer

  • Its Great!!!!
Size: 4 Gallons
Works great! I got the water pressure back. Easy to install.
Reviewed in the United States on December 4, 2025 by Anhvu Chuc Nguyen

  • Does your APEC system act like its prostate is inflamed?
Size: 4 Gallons
I bought my APEC system in 2018. I've done yearly filter changes, and the occasional RO filter replacement. The system ran great. Then several weeks ago, I noticed the water was coming out in much lower quantities. I could maybe get half a liter out and then it would just dribble. It was like it had an inflamed prostate. I read some other reviews and decided to buy this tank. Problem fixed! I get a nice, full flow of water and much more than a little tinkle. The tanks are only supposed to be good for five years, and then the diaphragm inside them slowly loses pressure which means the tank will fill, but you won't get very much water out of it since the diaphragm has lost pressure. After I removed the old tank it was almost full and there was over 2 gallons of water still in it that wouldn't come out of the faucet anymore. ... show more
Reviewed in the United States on December 12, 2025 by A. Consumer

  • VERY EASY, Great products
Size: 4 Gallons
Perfect replacement to our old system, all we know is it was about 13 years old and we have had poor pressure for two years, right after last filter change by local company. Finally wanted to replace all the filters, tank and membrane all at once. It was very easy to do. Great pressure out of the new tank that lasts for almost 2 minutes on full pressure, then pressure lowers consistently for a couple more. It hits the front of our sink now. So we will not even need to turn the gooseneck on all the way on like we have been. Would recommend and will be back for more filters, etc in the future. This was the first time doing it myself and we replaced the tank AND membrane along with the filters for cheaper than JUST filters cost through the local company, ... show more
Reviewed in the United States on December 6, 2025 by Amazon Customer

  • Good Quality Replacement Tank.
Size: 4 Gallons
Great replacement for old tank I had for over 10 years. Good quality and comes pre-charged. No instructiona necessary, just remove old tank, apply plumbers tape and screw on fitting and attach water line, then check for leaks. Fits most undersink RO systems. One tip: you will need to wait several hours for the tank to fill. At first it will seem like the tank is not filling up, but just give it several hours and it will be full. ... show more
Reviewed in the United States on December 3, 2025 by Boby Ten

  • Great buy
Size: 4 Gallons
Great replacement. Great buy.
Reviewed in the United States on January 23, 2026 by Manuel Rodriguez

  • Very pleased with this purchase
Size: 14 Gallons
Working well, capacity seems to be as advertised. No funny orders or taste. Easy to install. Preset pressure was perfect. Replaced the old 4 gallon that couldn’t keep up with family needs.
Reviewed in the United States on November 12, 2025 by Charlotte Abt

  • Works Good
Size: 4 Gallons
Good replacement for an old one that wore out. I needed a little more Teflon tape on the threads to fix a tiny leak, but this tank works just fine.
Reviewed in the United States on January 9, 2026 by Silent Sojourner

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