---
title: "Modular Steel Water Tanks South Africa | iWater"
description: "Galvanised modular steel water tanks, 12,000 to 1,000,000+ L. Rapid on-site assembly, food-grade liners, 25-40 year lifespan."
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---

[(010) 026 4225](tel:+27100264225)[admin@iwaterm.co.za](mailto:admin@iwaterm.co.za)

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# Modular Steel Tanks 

Durable, galvanised modular steel water storage tanks engineered for rapid assembly and long-lasting performance — from 12,000 to over 1,000,000 litres.

[Get a Quote](/contact) [Call Us](tel:+27100264225)

## Built to Store. Built to Last.

Our galvanised modular steel water storage tanks are engineered for durability and rapid installation. Available in a wide range of capacities, these tanks are ideal for industrial, agricultural, and municipal water storage applications across South Africa.

The modular panel design allows for flexible sizing, easy transport to remote sites, and on-site assembly without heavy lifting equipment. Hot-dip galvanised steel ensures decades of corrosion-free performance.

Capacity Range

12,000 – 1,000,000+ L

Material

Hot-Dip Galvanised Steel

Assembly Time

3–7 Days On-Site

Liners

Food-Grade SABS

![Modular steel water tank installation](/assets/modular-steel-tank-03-CVMXTkQL.webp)

![Steel water tanks aerial view](/assets/steel-tanks-aerial-Ct3LZ6pi.webp)

Tank Configurations

## Tank Types We Supply & Install

Every site has different requirements. We offer three core tank configurations — each engineered for specific applications and site conditions.

![Cylindrical Steel Tanks](/assets/cylindrical-steel-tank-4J4M0Vuh.webp)

### Cylindrical Steel Tanks

Our most popular configuration — cylindrical modular steel tanks deliver maximum storage capacity with the smallest footprint. The curved panel design distributes water pressure evenly, reducing structural stress and extending lifespan.

Capacity Range:  12,000 – 1,000,000+ litres 

Common Use Cases

Municipal bulk water storage 

Industrial process water 

Agricultural irrigation reserves 

Fire protection reserves (SANS 10252) 

Key Highlights

Most efficient volume-to-footprint ratio 

Even pressure distribution 

Minimal foundation requirements 

Standard diameters from 3m to 20m+ 

![Square / Rectangular Tanks](/assets/square-steel-tank-C_nnVdDN.webp)

### Square / Rectangular Tanks

Square and rectangular modular tanks are ideal for sites with space constraints or where tanks need to fit into specific building layouts. Corrugated steel panel construction provides excellent rigidity and allows for flexible dimensioning.

Capacity Range:  10,000 – 500,000+ litres 

Common Use Cases

Tight urban or industrial sites 

Underground or basement installation 

Commercial building integration 

Sewage and wastewater holding 

Key Highlights

Custom length × width configurations 

Space-efficient for constrained sites 

Stackable for multi-level installations 

Compatible with concrete or steel bases 

![Elevated Water Tanks](/assets/elevated-water-tank-CHuiEkOk.webp)

### Elevated Water Tanks

Elevated steel tanks mounted on engineered tower structures provide gravity-fed water pressure without the need for booster pumps. Essential for rural water schemes, fire protection systems, and sites requiring consistent pressure head.

Capacity Range:  5,000 – 200,000+ litres 

Common Use Cases

Gravity-fed distribution systems 

Rural and peri-urban water supply 

Fire suppression header tanks 

Agricultural and livestock watering 

Key Highlights

Eliminates need for booster pumps 

Consistent gravity-fed pressure 

Steel tower heights from 6m to 30m+ 

Reduces long-term energy costs 

Our Process

### From Sizing to Storage

A structured approach to delivering the right water storage solution for your needs.

01 

### Capacity Assessment

We assess your water storage needs based on daily demand, fire reserve requirements, and backup capacity to recommend the right tank size.

02 

### Site Survey & Design

Detailed site survey to determine foundation requirements, access for delivery, and optimal tank positioning for your layout.

03 

### Foundation Preparation

Preparation of a level, compacted foundation pad — concrete ring beam or full slab — engineered for the tank load and soil conditions.

04 

### On-Site Assembly

Modular steel panels are delivered and assembled on site by our specialist teams — typically completed within 3–7 days depending on tank size.

05 

### Liner & Fittings

Installation of food-grade internal liners, inlet/outlet fittings, overflow pipes, level indicators, and any required accessories.

06 

### Inspection & Handover

Final inspection, leak testing, and commissioning with full documentation and warranty. Maintenance plans available.

## Our Work in the Field

![Modular steel tank project 1](/assets/modular-steel-tank-03-CVMXTkQL.webp)

![Modular steel tank project 2](/assets/steel-tanks-aerial-Ct3LZ6pi.webp)

![Modular steel tank project 3](/assets/modular-steel-tank-06-t5Zv6fqo.webp)

![Modular steel tank project 4](/assets/cylindrical-tanks-dual-DqVw4-DA.webp)

## Accreditations & Certifications

Our tanks and processes meet the highest industry standards.

![SAPCS Certified](/assets/accreditation-sapcs-DATjng-N.webp)

![Water Institute of Southern Africa (WISA)](/assets/accreditation-wisa-Bpx11qlm.webp)

![ASIB Listed and Approved Supplier](/assets/accreditation-asib-ZEP292lW.webp)

![TÜV Rheinland ISO 9001:2015 Certified](/assets/accreditation-tuv-CLbQPFUU.webp)

## Technical Specifications

Capacity Range

12,000 – 1,000,000+ L

Material

Hot-Dip Galvanised Steel

Assembly Time

3–7 Days On-Site

Liners

Food-Grade SABS

Lifespan

25–40+ Years

Relocatable

Yes — Fully Modular

## Need Water Storage? Let's Talk.

Get a quote on modular steel tanks sized to your requirements. Delivery and installation nationwide. Financing available.

[(010) 026 4225](tel:+27100264225)

[admin@iwaterm.co.za](mailto:admin@iwaterm.co.za)

Johannesburg

Unit B2 Cessna Office Park 3 Dakota Crescent, Airport Park, Germiston, 1401

Cape Town

Unit 9, 12 Square Street, Watershed Park, Stikland Industrial, 7530

### Request a Quote

Submit Enquiry

## Frequently Asked Questions

Common questions about modular steel water tanks.

### What sizes of modular steel tanks are available?

### How long do modular steel tanks last?

### Are these tanks suitable for drinking water storage?

### How quickly can a modular steel tank be installed?

### What foundation is required for a steel tank?

### Can modular steel tanks be relocated?

## Services Often Bought With Bulk Storage

Storage is rarely installed on its own \\u2014 these services usually form part of the same project.

[Fill your tanks from a borehole 

A dedicated borehole turns bulk storage into genuine, municipality-independent water security.

](/services/borehole-drilling)[Treat water before or after storage 

Disinfection and filtration protect stored water quality and keep it SANS 241 compliant.

](/services/water-treatment)[Meet fire water reserve requirements 

Fire reserves, ring mains and pressure sets designed to SANS 10090 and insurer requirements.

](/services/water-fire-protection)

![iWater Management](/assets/iwater-logo-transparent-colour-Bjo3kDoS.webp)

We design, build, and maintain tailored water systems for South African farms, industries, and communities.

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#### Services

-   [Borehole Drilling](/services/borehole-drilling)
-   [Water Treatment](/services/water-treatment)
-   [Solar Powered Systems](/services/solar-powered-systems)
-   [Containerized Plants](/services/containerized-plants)
-   [Modular Steel Tanks](/services/modular-steel-tanks)
-   [Monitoring & Compliance](/services/monitoring-compliance)
-   [Water & Fire Protection](/services/water-fire-protection)
-   [DAB Pump Repairs](/services/dab-pump-repairs)

#### Company

-   [About Us](/about)
-   [Industries We Serve](/industries)
-   [Media Gallery](/media)
-   [Book Assessment](/book-assessment)
-   [Contact Us](/contact)

#### Service Areas

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#### Contact

[(010) 026 4225](tel:+27100264225)[+27 82 920 6862](tel:+27829206862)[admin@iwaterm.co.za](mailto:admin@iwaterm.co.za)

Johannesburg

Unit B2 Cessna Office Park 3 Dakota Crescent, Airport Park, Germiston, 1401

Cape Town

Unit 9, 12 Square Street, Watershed Park, Stikland Industrial, 7530

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