White modular panel water tank installed outdoors

Rectangular Modular Water Tanks​

Kolleksan rectangular water tanks are modular systems that provide high storage capacity in limited spaces, manufactured for each project in a range of sizes and material options. Galvanized, stainless, or coated panel options can be configured for potable water, fire water, process water, and industrial storage needs.

Interior surface of a modular panel water tank

What Is a Rectangular Modular Water Tank?

A rectangular modular water tank is a water storage solution built by joining panels with bolted connections and a suitable gasket system, and can be engineered in a range of sizes and capacities. Thanks to its knock-down structure, tank components can be easily transported to the installation site and assembled to fit the site conditions.

For galvanized and stainless rectangular water tank options, the material, coating, gasket, and connection details are determined based on the properties of the potable water, fire water, process water, or industrial liquid to be stored. Kolleksan offers integrated solutions covering engineering, manufacturing, and on-site installation for rectangular water tanks.

Kolleksan Rectangular Systems

A space-optimization solution developed specifically for narrow, angular or obstructed architectural areas where cylindrical structures, the ideal engineering form, cannot fit. Kolleksan Rectangular Systems turn spatial constraints into the most efficient water reserve.

01

Column protrusions, shaft voids or narrow corridors in mechanical rooms are no longer a reason for lost capacity. Beyond square and rectangular forms, tanks can be designed in special L-shaped or U-shaped configurations according to the project’s architectural constraints. Unlike cylindrical forms, they adapt to the geometry of the available space and make the most efficient use of limited volumes.

02

In extreme cases where the tank must be installed flush against the walls, the “internal assembly” option comes into play. In narrow technical spaces where leaving a working clearance for assembly personnel around the tank is impossible, the panels are joined from the inside, reducing space loss in the room to zero. Every millimeter of the space is included in the storage volume.

03

Spatial flexibility is provided without compromising engineering quality. Our rectangular water tanks are engineered in full compliance with the TSEK 304 criteria that define structural design, leak-tightness and mechanical strength standards. With stainless steel, galvanized or project-specific coating alternatives, they offer a safe storage infrastructure that complies with regulations.

04

Unlike conventional water tanks, they are shipped to the site in parts that can pass through standard elevators and narrow doors. The bolted structure, with both internal and external assembly flexibility, makes maintenance easier by allowing service and parts access only to the relevant panel in tight spaces, even years after the system is commissioned.

Types of Rectangular Modular Water Tanks

Rectangular water tanks can be manufactured with different material and coating options depending on the liquid to be stored, intended use, capacity, and site conditions.

Large white modular panel water tank installed next to a building

Galvanized Rectangular Water Tanks

Rectangular water tanks manufactured from galvanized steel panels offer economical and durable solutions for fire water, process water, and industrial storage projects.

White modular panel water tank installed indoors

Specially Coated Rectangular Water Tanks

Panel surfaces can be prepared with coating options suited to the properties of the liquid to be stored and the project's requirements.

Rectangular modular water tank with embossed steel panels

GRP Rectangular Water Tanks

Modular water tanks made from corrosion-resistant GRP panels can be engineered for different capacity and usage needs.

Rectangular modular water tank with embossed steel panels

Stainless Steel Rectangular Water Tanks

Rectangular modular water tanks manufactured with AISI 304 or AISI 316 stainless steel options can be configured for projects requiring high corrosion resistance.

High Corrosion Resistance

AISI 304 or AISI 316 steel options provide high corrosion resistance depending on project conditions.

Hygienic Water Storage

The stainless steel tank's cleanable surface structure supports the safe storage of water.

Project-Specific Capacity

The rectangular stainless steel water tank can be engineered as a modular system to the required dimensions and capacity.

Easy Installation and Maintenance

Thanks to its bolted panel system, the stainless steel modular water tank can be installed on-site and maintained on a planned schedule.

Applications of Stainless Steel Water Tanks

Stainless steel water tanks can be chosen for residential buildings, hotels, hospitals, schools, and commercial buildings where potable and utility water will be stored. Material, gaskets, and connection equipment are determined based on the project's hygiene and compliance requirements.
Stainless steel modular water tanks can be engineered to store the water needed for fire water reserves, process water, and production lines. Tank capacity and connection points are prepared according to the system's technical requirements.
Rectangular stainless steel water tanks can be applied at different capacities in factories, production facilities, shopping centers, and large-scale buildings. The modular panel system allows manufacturing and installation to fit site dimensions.
Rectangular modular water tank with embossed steel panels

Stainless Steel Water Tank Prices and Project-Specific Quotes

Stainless steel water tank prices are determined based on the required capacity, tank dimensions, choice of AISI 304 or AISI 316 steel, connection details, and on-site installation conditions. Share your project details, and the Kolleksan technical team will prepare the stainless steel modular water tank solution and price quote suited to your needs.