iSpring T55M 5.5 Gallon Pre-Pressurized Water Storage Tank for RO Systems | White

Overview

Introducing the iSpring T55M, a compact, reliable water storage solution designed for home RO systems. This 5.5-gallon metal tank has a usable interior capacity of about 4.0 gallons, giving you a ready reserve for daily needs without a bulky footprint. Independent testing confirms compliance with NSF/ANSI standards, underscoring quality and cross-brand compatibility. A stainless steel 1/4 inch NPT valve thread accepts a ball valve for straightforward shut-off, while the included tank stand helps keep the unit stable under a sink or in a utility area. Designed specifically for RO applications, the T55M can discharge efficiently in either vertical or horizontal orientations, offering installation flexibility to suit your space. It’s compatible with most reverse osmosis systems on the market, including popular name brands, making it a practical upgrade for many homes.

Design and materials

Inside the tank, a food-grade butyl diaphragm with post-cure processing creates a tasteless, odorless water chamber. This choice of materials supports clean-tasting water in everyday use and reduces the risk of off-notes from the storage stage. Pre-pressurized between 7-10 psi, the T55M is ready to integrate with typical RO system setups, helping to minimize extra steps during installation. The combination of sturdy metal construction and careful sealing helps ensure a calm, steady supply even during short-term demand spikes. The included stand keeps the unit accessible and neatly positioned in a kitchen cabinet or laundry room.

Core features

• 5.5-gallon metal pressurized tank with a 4.0-gallon usable capacity
• Food-grade butyl diaphragm with post-cure delivers a tasteless, odorless water chamber
• Stainless steel 1/4 inch NPT valve thread with a ball valve included
• Discharges effectively in both vertical and horizontal orientations
• Pre-pressurized at 7-10 psi for common RO configurations
• Tank stand included for stable placement
• Designed for compatibility with most RO systems on the market

Usage and compatibility

• Ideal for home RO setups seeking a reliable storage buffer
• Supports space-efficient installation under sinks or in utility areas
• Connections use standard 1/4 inch NPT hardware for easy integration
• Independent third-party testing adds a level of confidence for everyday use