Composite straightwall tanks engineered to stay permanently watertight for the life of the structure — no coatings, no crack fillers, no recurring repairs. State-of-the-art engineering designed to surpass industry standards and redefine long-term durability for water and wastewater facilities.
CROM2
Straight Wall Watertight Tanks
Unrivaled Longevity
Our patented CROM2 tanks are composite, straight wall storage tanks designed to stay watertight throughout their lifespan. The galvanized steel shell encased in shotcrete with specialty designed joints and corner posts provide watertight connections.
The structure is kept in persistent compression which helps maintain its integrity without the need for additional coatings or frequent repairs.
Notable Durability
CROM2 tanks can be tailored for various sizes, offering a low-maintenance, durable solution for storing water or wastewater.
They are especially beneficial for tanks between 15,000 and 1.5 million gallons, providing a practical and efficient option for many facilities.
Dependable Value
CROM2 tanks are meticulously designed and constructed, leveraging our decades of experience, quality and innovation, setting a standard for excellence in the water industry.
Backed by our CROM Standard Five-Year Warranty, you can expect unsurpassed safety and reliability at the lowest lifecycle cost with our watertight, tensioned straight wall tanks.
CROM2 Core Wall Features
A galvanized steel shell, encased in continuous shotcrete and held in permanent compression, is what keeps the wall watertight without added coatings.
The floor and wall of the tank are connected using a specially designed groove near the base. This groove allows a vertical steel layer to be securely sealed into place with materials like epoxy or grout, ensuring a strong, watertight bond. Once sealed, the entire structure is reinforced with a protective concrete layer to keep it durable and leak proof.
Straight walls are securely joined at 90-degree angles with a special sealant that ensures they stay tightly connected. The walls are reinforced with tension, pressing them together to create a strong, leak-proof structure. The entire tank is then coated with a smooth, protective concrete layer, making it durable and watertight without the need for additional coatings or crack fillers.
A bisecting wall junction plate allows internal walls to connect seamlessly within the tank, ensuring the entire structure stays watertight and strong. This connection uses a steel plate that fits securely into a groove, linking the walls together and preventing leaks. The design can include multiple connections for walls that meet at different angles, keeping the entire tank secure and leak proof.
Each of the four tapered walls of the tank is joined at the corners using a specially designed post that connects the walls at a 90-degree angle. This corner post is shaped to handle the necessary pressure and ensure a watertight seal. It includes unique slots and tensioning features that keep the structure tightly compressed and leak-proof. The post can be made into various shapes, such as L, T, or square, to fit the design, and it works to keep the tank secure by applying pressure in two directions.
Featured in Construction in Focus
CROM²’s watertight straightwall system has been recognized by Focus Construction for its approach to tensioned, coating-free tank design.
Let’s Build Something for Life
For infrastructure that’s built to last, choose a partner that supports its entire life.
CROM, your lifecycle partner.