

💧 Elevate your hydration game with seamless, pure flow—because waiting is so last decade.
The SimPure Small Water Pressure Tank is a compact, NSF-certified storage solution designed to optimize tankless reverse osmosis systems. With a 1.4L capacity and compatibility for 1/4" and 3/8" water pipes, it ensures steady water pressure for refrigerators and ice makers. Its food-grade butyl diaphragm guarantees pure, tasteless water, while the space-saving design fits easily under sinks. Easy to install with included fittings, this tank enhances water flow and system responsiveness, backed by SimPure’s trusted quality since 2006.











| ASIN | B0CS5VBK9S |
| Batteries required | No |
| Best Sellers Rank | #69,946 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #150 in Under-Sink & Countertop Filtration |
| Brand | SimPure |
| Capacity | 0.32 Gallons |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (212) |
| Included Components | Pressure water tank*1, accessories kit*1 |
| Item Weight | 2.51 pounds |
| Manufacturer | SimPure |
| Material | BPA-Free |
| Product Dimensions | 6.2"L x 6.2"W x 9"H |
| Shape | Rectangular |
| Specification Met | NSF/ANSI 58 Standard |
J**K
Works great and easy to install
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.
S**C
I am so Happy...I love my water & ice!
We added an Ispring Tankless RO water system under our sink, but you need an additional pressure tank for the fridge/Ice maker connection. We chose this due the small size. It works great! Now we have great ice & water and an additional bonus is the increased water flow & immediate responsiveness at the tap. My husband did have to get some additional fittings/adaptors to make it work, but well worth it. Highly recommend.
C**S
Solved Flow Rate Problem
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.
D**E
Wider base is helpful
Works as stated. The base is wide enough that we haven't had any issues with it tipping over. Found customer service to definitely lack and not helpfulat all. The product itself is fine.
S**S
Performs well but should have been included with the RO system.
Most other RO systems include a pressure tank so I was somewhat dismayed that this was a required additional purchase to feed my fridge. Not really a complaint against the item, which performs as expected and is quite compact compared to other brands, but a comment on the brand itself.
J**I
A Surprisingly Effective Upgrade for Tankless RO Systems
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.
B**.
Increased flow
This small pressure tank makes a substantial improvement in water flow from your R/O faucet. I have an R/O system from another manufacturer and installed this tank to improve the flow. Before the tank installation it took 6 seconds to fill an 8 oz cup. After the installation the fill time for 8 oz. reduced to about 3 seconds. The improvement in flow actually surprised me. Highly recommended.
E**.
Very Good
Small yet is perfect
R**T
Works verry well easy to install
Trustpilot
3 weeks ago
3 weeks ago