The ROT-2 tank, with an 8-liter (2.0-gallon) volume, is designed for reverse osmosis, café, and tabletop systems, delivering safe, pure, pressurized water.
Its maximum operating pressure is 7 bar (100 psi) and maximum temperature is 90 °C (194 °F). Pre-charged with 100% nitrogen to 0.5-0.7 bar (7-10 psi) for stable performance regardless of temperature.
With dimensions of 20.3 cm (8.0 inches) diameter and 28.7 cm (11.3 inches) height, it offers large storage in an adaptable form factor for commercial and tabletop setups.
Product Overview
The ROT-2 is an 8-liter (2.0 gallon) diaphragm pressure tank designed for reverse osmosis (RO) systems, café makers, and table systems. Equivalent to the industry-standard RO120, it securely stores purified water and delivers it with controlled, robust pressure. Ideal for commercial beverage applications, the ROT-2 features a hygienic internal design that prevents water from contacting the metal tank shell.
Utilizing an FDA-approved polypropylene liner and a DIN 4807-compliant butyl rubber diaphragm, it ensures safe operation and fresh, tasteless water free of rubber or plastic odors.
Manufactured with premium materials and holding top-tier certifications including NSF58, CE, and IAPMO, Aquasky RO tanks are produced in ISO 9001:2008 registered facilities to deliver a long service life, dependable performance, and the safest drinking-water compatibility on the market.
Certification
Specifications and Technical Data
| Parameter | Value |
| Model Number | ROT-2 |
| Total Tank Volume | 8 liters / 2.0 gallons |
| Diameter | 20.3 cm / 8.0 inch |
| Height | 28.7 cm / 11.3 inch |
| Net Weight (NW) | 2.0 kg / 4.4 lbs. |
| Gross Weight (GW) | 2.2 kg / 4.9 lbs. |
| Shipping Volume | 0.50 CUF |
| Operating Temperature | 90°C / 194°F |
| Factory Pre-charge | 0.5 - 0.7 bar | 7 - 10 psi |
| Max. Operating Pressure | 7 bar | 100 psi |
| Connection | 1/4” NPT Stainless Steel |
| Liner Material | Polypropylene (FDA grade) |
| Diaphragm Material | Butyl Rubber (DIN 4807 compliant) |
| Shell | Cold Rolled Carbon Steel |
| External Coating | Triple Coated Liquid Paint |
| Pre-charge Gas | 100% Nitrogen |
Key Features & Design Advantages
How the RO-PLUS Pressure Tank Works
ROT-2 stores supplemental water securely between the butyl rubber diaphragm and the polypropylene liner, while the nitrogen-filled air chamber maintains constant system pressure. When a drinking tap or coffee maker is activated, the compressed nitrogen pushes the purified water into the system at a controlled pressure.
This specialized design ensures stable performance, completely separates the water from the metal shell, and maintains a clean water zone that is completely free of rubber or plastic odors.
Key benefits
Typical Applications
Frequently Asked Question (FAQ)
Absolutely. The 8-liter (2.0-gallon) capacity of the ROT-2 provides ample pressurized water storage perfectly sized for café makers and tabletop water dispensing systems without taking up excess space.
Yes. The ROT-2 uses a high-grade polypropylene liner and a butyl diaphragm made with FDA-approved materials, which completely prevents the water from ever making contact with the metal tank shell.
This guarantees a tasteless water zone with no rubber or plastic smells, making it perfectly safe for clean drinking water. Furthermore, the stainless steel connector is chemical-free and lead-free.
No. The ROT-2 is designed to be entirely maintenance-free during its service life. We utilize a specialized brass cap with an internal O-ring that guarantees no air loss from the air vent.
Additionally, it is the only RO storage tank in the industry pre-charged with 100% Nitrogen, which naturally resists permeation and prevents pressure fluctuations caused by temperature changes
Customized Colors & Packaging
We offer a wide range of customization options to match your exact needs - from custom colors to branded packaging and logo design.
Watch our video to explore the possibilities and see how we help your products stand out in the market.
Downloads & Certification Links
Detailed product information and data.
Collection of all relevant product certifications.