Optimize the performance of your water treatment system with the 4-gallon (12-liter) reverse osmosis storage tank. This pressurized storage tank is designed to ensure a constant supply of purified water at optimal pressure for your home or business. Made with high-quality materials, it ensures the water is stored in hygienic conditions, isolating it from external agents and maintaining its properties intact for daily consumption.

Its compact and efficient design fits easily under the sink, integrating seamlessly with most compact reverse osmosis systems on the market. Thanks to its durable internal membrane and 12-liter gross storage capacity (equivalent to approximately 3.2 gallons of usable water), you'll always have fresh water available, eliminating the usual wait times of direct filtration when you need it most.

Main Features

• Total capacity of 4 gallons (approximately 12 liters) for excellent service flow.


• Pressurized design that guarantees a constant and uniform water pressure output at the tap.


• Maximum working pressure supported up to 7 kg/cm², offering maximum safety and durability.


• Robust construction with materials suitable for contact with drinking water.


• Compatible with the vast majority of domestic and light industrial reverse osmosis systems.


• Easy installation and maintenance thanks to its standard threaded connection.


• Product reference: B10394440.

Frequently Asked Questions

What is the purpose of an accumulation tank in a reverse osmosis system?

The reverse osmosis purification process is slow. The storage tank allows you to store the purified water so that, when you turn on the tap, you have a good flow immediately without having to wait for the filter to work in real time.

How is the actual capacity of purified water it contains calculated?

Although the tank has a nominal capacity of 4 gallons (12 liters), some of the interior space is occupied by the air pre-charge necessary to generate pressure. The actual usable water volume will always depend on the mains water pressure, typically ranging between 60% and 70% of its total capacity.

Does this tank require any type of periodic maintenance?

It is recommended to check the tank's air pressure once a year using a standard pressure gauge. Maintaining the correct pressure ensures that water flows strongly to the tap and extends the life of the internal membrane.

Is it compatible with any reverse osmosis system?

Yes, this model features universal standard connections that adapt seamlessly to the vast majority of reverse osmosis equipment installations available on the market.