iSpring T32M 4-Gallon Pressurized RO Storage Tank with Ball Valve

Overview

The iSpring T32M 4-Gallon Pressurized Storage Tank is designed to work with home reverse osmosis systems that produce purified water slowly. By storing water under pressure, it helps deliver a steady faucet flow on demand, reducing wait times for your next glass of water.

Built as a closed expansion tank with stainless steel connections, it minimizes exposure to air and potential contaminants. This unit carries safety and quality credentials that many RO setups rely on, including NSF/ANSI certifications and CE marking, offering reassurance about materials and construction.

How it works

The RO unit fills the T32M tank to capacity; when you open the dispenser, the pressurized air bladder pushes the water out through a 1/4" line. Pre-pressurized for common household use, the tank can be installed in either vertical or horizontal orientation to fit under your sink or in a utility area.

Key benefits

• On-demand water flow that feels more consistent at the tap
• Stainless steel connections to minimize leaching concerns
• Tasteless and odorless water thanks to a food-grade diaphragm
• Flexible mounting options for compact kitchens or utility spaces

Materials, safety, and certification

The tank uses a food-grade butyl diaphragm with a post-cure process to preserve water quality. It is NSF-listed and CE marked, with IAMPO approval noted for its compliance and durability.

Specifications and what’s included

Size and capacity: 14 inches tall, 11 inches in diameter. Actual tank capacity is 4.0 gallons with about 3.2 gallons usable draw-down. A 1/4" tank valve is included for straightforward RO system hookup, and the unit discharges effectively in both vertical and horizontal orientations.