Description

The 3.2 gallon reverse osmosis storage tank is a premium water storage tank designed for residential reverse osmosis (RO) drinking water systems. Manufactured from high-durability polypropylene composite with a food-grade polypropylene liner and post-cured chlorobutyl rubber diaphragm, it provides safe, clean, and odour-free water storage while delivering a consistent flow of purified water to your drinking faucet.

Unlike traditional steel storage tanks, this corrosion-resistant plastic tank will not rust, chip, peel, or dent, making it ideal for damp under-sink environments. Compatible with many standard residential RO systems using a 1/4″ Male NPT tank connection, subject to system requirements..

Features:

• Premium reverse osmosis water storage tank.
• Food-grade polypropylene composite construction.
• Rust-proof, corrosion-resistant design.
• Food-grade polypropylene inner liner.
• Post-cured chlorobutyl rubber diaphragm.
• Delivers clean, odour-free drinking water.
• Consistent water pressure and flow.
• Standard ¼″ Male NPT connection.
• Compatible with most standard residential reverse osmosis systems using a 1/4″ Male NPT tank connection.
• Lightweight and impact-resistant.
• Ideal for under-sink installations.
• NSF/ANSI 58 certified for material safety and structural integrity.

Specifications:

• Tank capacity: 3.2 Gallons (11.3 L).
• Usable water capacity: 6.8–8.3 L, depending on operating conditions.
• Maximum working pressure: 60 PSI (4.1 bar).
• Pre-charge pressure: 5 to 7 PSI (when empty).
• Connection port: ¼″ Male NPT.
• Tank material: High-durability food-grade polypropylene composite.
• Inner liner: Food-grade polypropylene.
• Diaphragm material: Post-cured chlorobutyl rubber.
• Certification: NSF/ANSI Standard 58.
• Installation: Under-sink RO systems.

Applications:

• Domestic reverse osmosis systems.
• Under-sink RO systems.
• Residential drinking-water purification systems.
• RO storage tank replacements.
• Kitchen drinking-water systems.
• Point-of-use RO systems.
• Small office RO drinking-water systems.
• Light commercial RO systems, where tank capacity and pressure requirements are suitable.

Installation:

Install the storage tank in a clean, stable and suitable location beneath the sink or in another approved installation area. Ensure the tank pre-charge pressure is maintained between 5 and 7 PSI when empty. Check the tank pre-charge pressure when the tank is completely empty and adjust only according to the tank or RO system manufacturer’s specifications.

Advantages of plastic vs steel RO tanks:

• Rust-proof construction: Will not corrode in damp under-sink environments.
• Lightweight design: Easier to transport and install than steel tanks.
• Dent and impact resistant: More durable during installation and everyday use.
• No peeling paint: Maintains a clean appearance throughout its service life.
• Improved water quality: Food-grade liner prevents water from contacting raw metal, helping maintain fresh taste and odour.

Why choose the 3.2 gallon (11 L) RO storage tank?

• Provides reliable storage for purified drinking water.
• Rust-proof polypropylene construction eliminates corrosion and peeling paint.
• Food-grade materials ensure clean, fresh, and odour-free water.
• Delivers consistent water pressure to the drinking faucet.
• Lightweight yet highly durable construction.
• Universal ¼″ Male NPT connection fits most residential RO systems.
• NSF/ANSI 58 certified for quality and safety.
• Long service life with minimal maintenance.
• Ideal replacement for traditional steel RO storage tanks.