The ROT-3 is a compact, convenient steel pressure tank for standard reverse osmosis systems, ensuring safe, pressurized water delivery. It has a total volume of 12 liters (3.2 gallons) and can process 12 liters per hour, suitable for households of up to three people.
The maximum operating pressure is 7 bar (100 psi), and the maximum temperature is 90 °C (194 °F). It is factory pre-charged with 100% nitrogen to 0.5-0.7 bar (7-10 psi) for stable performance.
Measuring 22.9 cm (9.0 inches) in diameter and 34.3 cm (13.5 inches) high, this stand-model tank includes a durable plastic base, allowing for easy, space-saving installation in under-sink residential setups.
Product Overview
The ROT-3 is a 12-liter (3.2 gallon) diaphragm pressure tank engineered specifically as a standard Reverse Osmosis (RO) drinking tank. Mounted on a specialized plastic base, it securely stores purified water and delivers it into the plumbing system with controlled, robust pressure.
ROT-3 is ideal for residential applications demanding the highest quality of clean, odor-free drinking water. Its highly hygienic internal design separates the stored water from the compressed gas and prevents water from making direct contact with the internal steel tank shell. Utilizing an FDA-approved polypropylene liner and a DIN 4807-compliant butyl rubber diaphragm, the ROT-3 ensures exceptionally safe operation, delivering cleaner, fresher, and better-tasting water while maintaining a tasteless water zone absolutely free of any rubber or plastic smells.
Manufactured with premium steel 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-3 |
| Total Tank Volume | 12 liters / 3.2 gallons |
| Diameter | 22.9 cm / 9.0 inch |
| Height | 34.3 cm / 13.5 inch |
| Net Weight (NW) | 2.8 kg / 6.2 lbs. |
| Gross Weight (GW) | 3.1 kg / 6.8 lbs. |
| Shipping Volume | 0.79 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-3 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)
The ROT-3 provides a standard 12 liters per hour flow rate, making it a highly convenient tank specifically suited for providing pure drinking water for a household of up to 3 people.
No. The ROT-3 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.
AQUASKY invented the leak-safe technology applied to the stainless connector 18 years ago, setting the benchmark for drinking water tanks. Manufactured in an ISO 9001:2008 registered facility and holding top-tier certifications like NSF58 and CE, it is recognized as one of the safest pressure vessels in the market.
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.