SimPure Small Water Pressure Tank for Tankless Reverse Osmosis System, RO Water Storage Tank with Fittings for Refrigerator, Ice Maker, Suitable for 1/4" and 3/8" Water Pipes
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Availability:
20 left in stock
Arrives
Thursday, Jul 23
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Features
- ENHANCED PERFORMANCE of TANKLESS RO SYSTEM: The compact water pressure tank from SimPure is engineered to boost the capabilities of tankless RO systems. It ensures smooth coordination with the refrigerator and ice maker, cutting down on the need for frequent reboots. It extends the reach of the RO system to guarantee continuous water flow and ice supply, enabling quick access to water without any waiting
- NSF CERTIFIED and TESTED: The reverse osmosis tank has been tested and certified by NSF, meets the NSF/ANSI 58 Standard, and complies with material and structural integrity requirements. Each pressure tank undergoes rigorous quality and durability testing, ensuring exceptional quality and performance. This water storage tank is crafted from a food-grade butyl diaphragm, providing a tasteless and odorless water chamber that keeps your water free from impurities
- SIMPLE INSTALLATION: The user manual provides clear and easy-to-follow instructions for installing the water pressure tank. The RO tank includes all necessary fittings for effortless connection to the refrigerator or ice maker, it can be set up with 1/4" and 3/8" water pipes, which is a perfect addition to any RO water system
- SPACE-SAVING DESIGN: The small pressurized tank features a compact size ( 6.6*9.2) with a 1.4L capacity, saving under-sink space and eliminating the need for a tank stand. It is the perfect fit for all tankless RO systems, including T1-400UV, T1-400ALK, Q3-600, G3P600, G2P600, G3P800, G2, G3, D6, D4, PD400, PD500, PD600, PX500, KFL-X6, PL400G, CUW4, etc
- SERVING USA SINCE 2006: Seattle, WA USA, SimPure is dedicated to providing world-class quality water filtration solutions. If you are not satisfied with your purchase, then we want to hear from you. Please contact our trained water specialists. And is available to answer any questions during the life of the product
Brand: SimPure
Color: White
Material: BPA-Free
Product Dimensions: 6.2"L x 6.2"W x 9"H
Capacity: 0.32 Gallons
Brand Name: SimPure
Manufacturer: SimPure
Manufacturer Part Number: HYRO- 1.0
Included Components: Pressure water tank*1, accessories kit*1
Material Type: BPA-Free
Item Dimensions L x W x H: 6.2"L x 6.2"W x 9"H
Capacity: 0.32 Gallons
Item Weight: 2.6 Pounds
Color: White
Shape: Rectangular
Specification Met: NSF/ANSI 58 Standard
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Jul 23
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
My benchmark was the Aquasana Max Flow system advertising at 0.5 Gal per minute, but my kids complained "the water tasted buns," due to the San Antonio, TX hard water. I replaced with the outstanding SimPure T1-400UV Tankless RO system and the water is so good, my kids dropped from 3 artificially sweetened drinks (intolerant of the "buns" tasting water) to 0-1 per day. The only issue was the flow was noticeably/annoyingly slower. The specs on the T1-400UV say it is 0.27 Gal per minute, and mine measured a little faster at ~0.37 Gal per minute on a short fill. I added this tank and speed shot up to 1.1 Gal per minute. It takes up minimal space under the sink, but holds 1.4L in reserve to crank out at 1.1 Gal/min which covers all my water and sports bottle volumes. So if I was filling up more than 1.4L, it would drop back down to baseline flow, but anything under is true max flow. I don't have it hooked up to my ice or fridge, I just got it to increase flow. Of note, it would work with any water filter, not just SimPure, and just hold that higher-pressure 1.4L in reserve.
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Reviewed in the United States on April 3, 2026 by Disciple of Hugeness
Perfect little tank for adding a 50gpd RO unit to our ice machine! It’s small and gets the job done.
Reviewed in the United States on May 31, 2026 by C. Brown
This tank works exceptionally well. It doubled the flow on my tankless system (Waterdrop G3P600) and also resolved the hot-water flow issue. It’s compact enough to fit under the sink, which makes installation easy. While it may seem counterintuitive to pair a tank with a tankless system, it significantly improves convenience: the first few glasses are dispensed immediately, and the tank refills afterward while I’m not waiting.
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Reviewed in the United States on January 27, 2026 by jedi
We have a tankless RO system, but due to our connection to our refrigerator, we needed to add a small tank to minimize surging of the RO system. Initially we purchased a "mini" tank that worked well for about 2 years. When it failed, I started to re-order another "mini" tank and then came across this one. Here are the pros amd cons: Pros: 1. Takes up just a little more room as the "mini" tank, just a bit taller. 2. Capacity is about 3-4 times the "mini" tank. 3. Stopped all surging of the RO system whenever water was being dispensed thru the refrigerator (ice maker or thru the door). 4. Came with all the necessary connectors valves and Teflon tape. 5. THE WIFE COMMENTED HOW MUCH BETTER THE SYSTEM WAS RUNNING THAN WIRH THE OLDER TANK... HAPPY WIFE ... HAPPY LIFE. Cons: None so far, time will only tell how long this one will last. But when it goes, we will be getting the same as a replacement.
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Reviewed in the United States on October 31, 2024 by C. Kinerd
Good compact size,
Reviewed in the United States on May 11, 2026 by Jim
I just received this pressure tank. It took less than 3 minutes to install and test. I am very impressed by this tank. I installed it in minutes and it solved the problem I had with pulsing water coming from my instant water heater. I couldn't believe how easy it was to install and use this tank.
Reviewed in the United States on November 14, 2025 by Jack
We installed an additional RO faucet in our bathroom, using about 35' of 1/4" tubing from our kitchen system. Because of the long run of tubing to the bathroom sink, the flow rate was painfully low, 10 seconds to fill just 8 ounces. We installed this SimPure tank under the sink and PERFECT! Great water flow to fill a glass, 3 seconds to fill the same 8 ounces, while loosing virtually no space under the sink.
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Reviewed in the United States on January 10, 2026 by Christopher Dinnes
Absolute worst customer service from this company. You spend all the money and invest in a filter system and then they can’t fulfill the replacement orders so then you have to buy a whole new system. I feel scammed and taken advantage of.
Reviewed in the United States on June 6, 2026 by STEFANI LYDON