Client Notice
Pricing update from October 2026: Revised pricing will apply due to continued increases in material, manufacturing and logistics costs.
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Client Notice
SS304 stainless steel sectional water tanks are intended for non-potable water storage, commercial and industrial water systems, and selected fire-protection applications. Their modular construction provides a durable and corrosion-resistant alternative where stainless steel is preferred over a coated steel tank.
SS304 is not suitable for potable water service installations in Singapore. PUB’s stipulated standards require stainless steel sectional water storage tanks used for potable water service to be Grade 316 or better. SS316 should also be considered for coastal, marine or higher-chloride environments.
Installation, replacement and repair support across Singapore and Asia.
Grade 304 Stainless Steel
Non-potable and fire-protection water storage
SS304
1.0 m or 1.22 m
4.0 m or 4.88 m
Reliable water storage for applications that do not involve drinking or potable water service.
Modular water storage for commercial buildings and general building-service applications.
Corrosion-resistant stainless steel storage for selected industrial water systems and process requirements.
An uncoated stainless steel alternative for selected sprinkler, hosereel and other fire-protection water storage systems.
For clients seeking an alternative to HDG fire protection water tanks, Magtech also provides stainless steel tank options. Stainless steel tanks are available in different grades to suit project requirements, water quality conditions, and budget considerations. In general, stainless steel tanks are more corrosion-resistant and hygienic, though they typically cost more than HDG tanks.
Potable or non-potable use
Water quality & environment
SS304 or SS316
Unsure which stainless steel grade your project needs? The correct grade depends on the intended water use, project requirements and surrounding environment.
Download Our Water Tank Brochure
View Magtech’s sectional water tank products, applications and available installation services.
SUNNIK stainless steel tanks use hydraulically pressed modular panels manufactured from stainless steel plate. Depending on the selected product specification, the manufacturing process may include precision laser cutting, robotic welding, dye-penetrant inspection, pickling and passivation, and hydrostatic testing.
Pickling and passivation help restore the stainless steel’s protective passive layer after fabrication. Unlike coated steel tanks, stainless steel tanks do not depend on an applied internal or external coating for corrosion protection, eliminating the risk of the protective coating peeling or degrading over time.
Pressed stainless steel panels provide the structural stiffness required for modular water storage.
The manufacturing process may include laser cutting and robotic welding for controlled panel fabrication.
These treatments help restore the stainless steel’s protective passive layer after fabrication.
Dye-penetrant inspection and hydrostatic testing may be included according to the selected product specification.
1.0 m / 1.22 m
4.0 m / 4.88 m
1.0–1.5 mm
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| Tank Height | Panel Location | Panel Thickness |
|---|---|---|
| 1.0 m / 1.22 m | Bottom and side walls | 2.0 mm |
| 2.0 m / 2.44 m | Bottom and first tier | 2.5 mm |
| Side walls | 2.0 mm | |
| 3.0 m / 3.66 m | Bottom and first tier | 3.0 mm |
| Second tier | 2.5 mm | |
| Third tier | 2.0 mm | |
| 4.0 m / 4.88 m | Bottom and first tier | 4.0 mm |
| Second tier | 3.0 mm | |
| Third tier | 2.5 mm | |
| Fourth tier | 2.0 mm | |
| Roof cover | Roof panels | 1.0–1.5 mm |
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| Tank Footprint | Height 1.22 m | Height 2.44 m | Height 3.66 m | Height 4.88 m |
|---|---|---|---|---|
| 1,220 × 1,220 mm | 1.82 m³ | 3.64 m³ | — | — |
| 3,660 × 3,660 mm | 16.36 m³ | 32.73 m³ | 49.09 m³ | 65.45 m³ |
| 6,100 × 6,100 mm | 45.45 m³ | 90.91 m³ | 136.36 m³ | 181.82 m³ |
| 15,860 × 15,860 mm | — | — | 921.82 m³ | 1,229.09 m³ |
Confirm that SS304 is appropriate for the stored water and that the installation is not intended for potable service.
Check the available length, width and height before selecting the modular tank configuration.
Specify the required effective capacity rather than relying only on nominal gross volume.
Modular panels can be transported separately and assembled within restricted-access plant rooms and tank areas.
Panel thickness must correspond with the final tank height, configuration and approved design conditions.
Material is not a free choice in Singapore. The application determines it, and specifying the wrong one produces a rejected submission rather than a saving.
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| Tank Material | Suitable Applications | Standard or Requirement | Product Page |
|---|---|---|---|
| FRP / GRP | Potable & non-potable | SS 245:2014 — mandatory for potable water storage since 1 June 2019 | View Product → |
| HDG Pressed Steel | Fire protection | SS 22; LPCB listing where specified | View Product → |
| SS304 Stainless Steel | Non-potable only | Suitable for non-potable water; not permitted for potable service | View Product → |
| SS316 Stainless Steel | Potable & high-spec | PUB’s stipulated standards require Grade 316 stainless steel or better for potable water storage. The complete water service installation must also comply with SS 636 and prevailing PUB requirements | View Product → |
Smooth stainless steel surfaces resist dirt, sludge and bacteria build-up, allowing easier cleaning and maintenance.
SS304 provides strong corrosion resistance in most standard environments, helping the tank maintain its structural integrity over time.
Long-lasting stainless steel construction can help reduce ongoing maintenance and future replacement costs.
The panel system supports easier transportation, installation, future expansion and individual panel replacement.
The stainless steel surface does not require a protective coating, avoiding problems caused by coating peeling, deterioration or additional coating maintenance.
Stainless steel is environmentally friendly and fully recyclable, supporting a lower lifecycle impact.
To understand expected service life and maintenance considerations, read how long FRP and stainless steel water tanks last →
Installation is carried out by our own Singapore crews rather than subcontracted teams, with several installers bringing 10 to 20 years of experience in sectional tank installation and replacement works.
Our in-house installation team delivers safe, efficient works with minimal disruption to your operations.
We specialise in water tank replacement for ageing or leaking systems, ensuring reliable performance and compliance with current standards.
We diagnose and repair tank issues quickly, helping to stop leakage, extend lifespan and avoid unnecessary full replacement.
SS Earthquake Test Report
GREENGUARD Gold
2 Years
Our standard warranty for manufacturing defects is two (2) years from the date of tank completion. This may be reviewed and adjusted upon mutual agreement, depending on project requirements.
1 Year DLP
The Defects Liability Period (DLP) for workmanship is one (1) year from the date of completion of installation.
For potable-water applications in Singapore, stainless steel sectional tanks must comply with PUB’s prevailing stipulated standards and requirements. SS304 is not suitable for potable service, so an appropriate SS316 tank system should be selected for these installations. Contact Magtech for the current material certificates, test reports and technical submissions applicable to your project.
Short answers to the questions most often raised during tank selection and quotation review.
No. PUB stipulates a minimum of Grade 316 for stainless steel sectional tanks used in potable-water service, so SS304 is not suitable for potable use in Singapore.
SS304 remains appropriate for suitable non-potable applications such as selected fire-protection, sprinkler and flushing-water storage, subject to the project specification.
HDG pressed steel remains the more cost-effective and commonly specified option for fire-protection water storage in Singapore. SS304 has a higher initial cost but provides an uncoated stainless steel surface, eliminating maintenance issues associated with peeling or deteriorating protective coatings.
The appropriate option depends on the project specification, site environment, budget and required service life. Magtech can review the intended water usage and project requirements before recommending SS304 or HDG.
When to choose an HDG pressed steel tank and when FRP is the compliant choice →
With the correct grade selection, proper installation and regular maintenance, stainless steel sectional tanks typically last around 20 to 30 years.
Actual service life depends on water quality, site environment, cleaning, inspection and timely repair of damaged components.
Both are stainless steel, but they serve different purposes:
If your water is not for drinking purposes, SS304 is generally the more practical and economical choice. If drinking water compliance is required, SS316 is the appropriate option.
Read the SS304 vs SS316 Water Tanks in Singapore: Which Grade Does PUB Actually Require? →
Send us the required effective capacity, available space, intended water use and project drawings. Our team can review the information and advise on the next step.