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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
SS316 stainless steel sectional water tanks are designed for potable water storage and applications requiring greater resistance to corrosion. They are commonly selected for domestic water systems, commercial and industrial developments, and sites exposed to coastal or higher-chloride conditions.
For potable water service installations in Singapore, PUB’s stipulated standards require stainless steel sectional water storage tanks to use Grade 316 stainless steel or better throughout the tank panels. The complete water service installation must also comply with the Public Utilities (Water Supply) Regulations, SS 636 and prevailing PUB requirements.
Installation, replacement and repair support across Singapore and Asia.
Grade 316 stainless steel
Potable and selected fire-protection water storage
316
1.0 m or 1.22 m
4.0 m or 4.88 m
Hygienic stainless steel storage for drinking water, domestic water and potable-water service installations.
Long-lasting water storage for commercial developments, industrial facilities and higher-specification building services.
Greater resistance to chloride-related corrosion for coastal, marine and other demanding site environments.
A premium stainless steel option for selected fire-protection water storage where SS316 is required by the project specification.
PUB’s stipulated standards specify a minimum of Grade 316 for stainless steel sectional water storage tanks used in potable-water service installations.
The requirements apply to the complete stainless steel tank, including the tank body, drainage panels, bottom panels and roof covers. Components and materials in contact with potable water must also comply with the applicable stipulated standards and testing requirements.
Available Stainless Steel Grades
Complete SS316 Construction
Test Reports & Technical Submission
PUB Requirements & SS 636
Unsure which stainless steel grade your project needs? The correct choice depends on the intended water use, project requirements, water quality 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 whether the tank forms part of a potable-water service installation and which PUB requirements apply.
Confirm the required material grade for the tank body, drainage panels, bottom panels, roof covers and applicable water-contact components.
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.
The supporting base and capping-flat requirements must correspond with the selected module system and approved tank design. Tanks above 3 m may require steel capping flats, while configurations above the normal height schedule require manufacturer approval.
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 → |
Grade 316 is the minimum stainless steel grade stipulated for sectional potable-water tanks in Singapore.
SS316 provides higher corrosion resistance than SS304, particularly in coastal, marine or higher-chloride environments.
Smooth stainless steel surfaces resist dirt and residue build-up, supporting easier cleaning and maintenance.
The panel system supports easier transportation, restricted-access installation, future expansion and individual panel replacement.
Strong stainless steel construction provides dependable long-term performance for domestic, commercial and industrial water storage.
The stainless steel surface does not depend on an applied protective coating, avoiding maintenance issues associated with coating peeling or deterioration.
For lifecycle and replacement planning, learn how long stainless steel water tanks typically 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.
Short answers to the questions most often raised during tank selection and quotation review.
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? →
For potable, coastal, or hygiene-critical applications, yes — both for compliance and for its superior resistance to chloride pitting, which extends service life and lowers lifetime cost.
Read the Commercial Water Tank Replacement Cost in Singapore: What Affects the Price? →
With correct grade selection and good maintenance, stainless steel tanks typically last around 20 to 30 years — generally longer than FRP, which tends to last around 15 to 20 years.
Potable water tanks must be inspected, cleaned, and certified by a Licensed Plumber at least once every 12 months under PUB regulations.
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.