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iSpring

iSpring T11M 11 Gallon Pre-Pressurized Water Storage Reverse Osmosis Systems ro Tank, White

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Availability: In Stock.
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Arrives Thursday, Apr 30
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Style: 11 Gallons


Features

  • Reliable Water Supply: Our 11-gallon water tank (holds up to 8.2 gallons) is designed to work seamlessly with your reverse osmosis (RO) water filtration system or other water filter systems, ensuring a constant supply of purified water.
  • Superior Quality Materials: Constructed from FDA-grade polypropylene liner and high-grade butyl diaphragm, with 304 stainless steel connections, this tank guarantees safe, tasteless, and odorless water storage. It is tested by an independent third-party to meet NSF/ANSI standards.
  • Stable Pressure Maintenance: Pre-charged to 7 psi with compressed nitrogen, the RO pressure tank maintains stable air pressure over time, preventing waterlogging and ensuring consistent water flow. The tank can be recharged to extend its usability.
  • Complete Installation Kit: The kit includes a shut-off valve, tank connector, and tank stand, making it easy to integrate with your RO system under sink. It efficiently discharges water in both vertical and horizontal positions.
  • Lifetime Customer Support: Enjoy peace of mind with our lifetime free tech support. Our dedicated customer service team is always ready to assist with any issues related to your reverse osmosis storage tank.

Description

Water goes through a reverse osmosis membrane very slowly and people don't have the patience to wait a long time to get a cup of water. For this reason the residential RO units need a water storage tank to store the filtered water. The RO tanks can deliver stable and constant water flow when the faucet is opened. The concern that pollutants might come from air with the use of an open tank favors the use of a closed expansion tank. Lead in drinking water causes health risk, brass and copper are banned from being used in drinking water. This tank uses stainless steel connections to avoid the lead concerns. This tank is tested by independent third-party to meet NSF/ANSI Standard. From the Manufacturer Water goes through a reverse osmosis membrane very slowly and people don't have the patience to wait a long time to get a cup of water. For this reason the residential RO units need a water storage tank to store the purified water. The RO tanks can delivery stable and constant water flow when the faucet is opened. The concern that pollutants might come from air or animals with the use an opened tank favors the use of a closed expansion tank. Lead leaching to drinking water the cause of health risks, brass and copper are banned for use in purified/drinking water. This tank uses stainless steel connections to avoid the lead leaching concerns. This tank is NSF approved under standard 58, and CE approved under the PED (pressure equipment directive). Features - Stainless steel connection built for Reverse Osmosis water storage tank; pump tank & thermal tank applications. - Brass cap with internal O-ring guarantees no air loss from air-vent. - Smooth internal air vent cap prevents diaphragm damaged. - High-grade butyl diaphragm, post-cure procedure insures a tasteless and odorless water chamber - NSF 61 and 58 listed. - IAMPO approved. - CE Mark approved TANK BALL VALVE NOT INCLUDED Specifications & Dimensions - Height: 22", Diameter: 15" - Tank storage capacity: 11 gallons - Shipping weight: 25 LBS - Packing dimension: 16w x 16d x 23h

Brand: iSpring


Special Feature: Leak Proof, NSF Standard


Product Dimensions: 16"L x 16"W x 24.5"H


Material: Stainless Steel


Capacity: 11 Gallons


Included Components: RO tank


Package Information: Stand


Installation Type: Under Sink


Purification Method: Reverse Osmosis


Power Source: Manual


Brand: ‎iSpring


Special Feature: ‎Leak Proof, NSF Standard


Product Dimensions: ‎16"L x 16"W x 24.5"H


Package Information: ‎Stand


Installation Type: ‎Under Sink


Power Source: ‎Manual


Item Weight: ‎23.55 Ounces


Model Name: ‎11 Gallon Pre-Pressurized Water Storage Tank for Reverse Osmosis (RO) Systems


Supported Water TDS Level Maximum (PPM): ‎500


UPC: ‎662425023691


Global Trade Identification Number: ‎91


Manufacturer: ‎iSpring


Item Weight: ‎1.47 pounds


Item model number: ‎T11M


Is Discontinued By Manufacturer: ‎No


Date First Available: ‎September 16, 2010


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Thursday, Apr 30

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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Similar Products

Top Amazon Reviews

    • Good quality tank
Style: 11 Gallons
A good quality tank for a reasonable price. The seller is quite responsive. Be aware that this tank does not come with push-type fittings. It has JACO fittings included. If you want to install it with the much easier John Guest or push-type fittings, you'll need to provide them.
Reviewed in the United States on February 13, 2026 by Victoria Bell
    • Valve seemed a bit tricky, but installed it works AMAZING
Style: 11 Gallons
Overall this is a great tank. I did have some trouble with the valve, but John was awesome and sent me a replacement which seemed to do the trick. I used plumbers putty and a lot of teflon tape and got the valve to stop leaking... after talking to an R/O person, apparently it's common to have to use these to get a good seal under the kind of pressure these tanks have. I love the capacity. No, you're not getting 11 gallons, as a good portion of the tank needs to be used to build the air pressure, but it's SO much better than the standard 3.5 or 5 gallon tanks. I have a big 2 gallon water jug I use when I go camping and I can fill it up to the top now. This 11 gallon tank fits under my sink, but it takes up a lot more room than my last one - I was prepared for this and am OK with it, just an FYI. ... show more
Reviewed in the United States on October 25, 2022 by Greg K
    • Great tank, terrible hardware
Style: 11 Gallons
Review Image by Michael R. Michael R.
Review Image by Michael R. Michael R.
Going from a 4 gallon tank to this 11 gallon tank is an obvious upgrade on its own. The tank comes with a nice stand and some hardware. I am happy with everything except the hardware. No matter what I tried, there was a leak. First, there was a leak coming out of the area you thread the valve into what I’ll call the main nut that goes over the top of the tank. I read previous reviews and saw that many others mentioned issues with the hardware and leaks. So, I tried a lot of teflon tape. Still leaked. I did some research and came across Blue Monster Pipe Thread Sealant. Turns out I had some which was great. Applied it and solved that issue. Then a new leak formed where the tubing is inserted. Again, applied the BM Sealant and problem solved. Then a leak appeared from the nut that secures the red shut off valve. It was then that I realized I needed to invest in some new hardware. I stopped at a local plumbing store and got some great suggestions as well as a shopping list. The items they recommended are shown in my second picture: 1.) Blue Monster PTFE Thread Tape 2.) 1/4” Brass Hose Barb 3.) 3/8” Clamp These three items solved my issue 100%. No leaks whatsoever. I was skeptical because doing this would eliminate a shut off, so I just added a shut off between the lines. Hope this helps anyone having issues with their hardware. ... show more
Reviewed in the United States on December 27, 2023 by Michael R. Michael R.
    • Another Great iSpring product
Style: 11 Gallons
Review Image by Mark P. Mark P.
Works great, feeding 2 ice makers and a whole family that goes though a lot RO water, never ran out of water and always plenty of pressure to feed everything. I also have iSpring water filters and RO system, they have all been quality products. Only down side after little over 2 years of use, the plastic adapter at the bottom of the tank cracked and was leaking for a few days before I discovered it and was rather upset to say the least. Reason for 4 star and not 5 as I would hope it would have lasted longer. They have since updated and improved their design so the new tanks going forward don't have this same problem, unfortunately I had the over version. Called iSpring, Michele was super friendly and helpful. She listened to my issue and was able to find the replacement part I needed as I tried to describe it to her over the phone. They shipped it out right away and took care of me. Great customer service and glad to see a company that stands behind their products. ... show more
Reviewed in the United States on August 26, 2023 by Mark P. Mark P.
    • Works well
Style: 11 Gallons
I ordered this 11 gallon storage tank because with my current tank I constantly ran out of filtered water and would always have to wait for a while for the tank to fill up. Now I never run out. When I first received the new tank and connected it up I used Teflon tape at both fittings and I got leaks. I tightened the fittings too tight and broke the valve off inside the large tank fitting. I called iSpring and Sean sent me the replacement fittings. Within a few days I had them, added more Teflon tape, carefully tightened the fittings and it worked well with no leaks. ... show more
Reviewed in the United States on February 27, 2024 by Greg
    • Came with a big Dent
Style: 11 Gallons
Box was fine but item came with a big dent. Where's the quality control?
Reviewed in the United States on January 25, 2026 by c
    • Easy Set Up - Excellent Customer Service
Style: 11 Gallons
Review Image by DavidA DavidA
I purchased this to replace my existing RO tank, after receiving an outrageous quote from a local water company. This tank had the right amount of capacity, great price and straight forward installation instructions. After unpacking the box and supplied parts, it appeared to me the quick connect fittings sent were for a 3/8" water line and mine was 1/4". I called their customer service number and the call was answered on the second ring! A very helpful gentleman named Sean listened to my situation, provided a straight forward solution and sent me the needed adapters free of charge. Upon arrival I had the system assembled in no time! This company has excellent customer service and a product that is easy to install, even for a novice like myself. ... show more
Reviewed in the United States on October 7, 2025 by DavidA DavidA
    • metal hose fitting/valve leaks.
Style: 11 Gallons
Had an old 4.4 gallon RO tank that the bladder failed in. It was too small anyway - I was always running out of RO water. Bought this and now have plenty of clean water. The only problem was the metal fitting/valve for the hose. I could not get it to not leak where the two pieces of it screw into each other, no matter how much thread tape or putty I used. I replaced it with a one-piece plastic one I bought on Amazon and... no more leaks. Still giving this 5 starts though because it was cheap for its size and works great. ... show more
Reviewed in the United States on August 27, 2024 by Wiggypa

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