GFS Bolted Tank for Drinking Water Storage
The water a community, a factory or a family drinks has to stay clean, and the tank it sits in matters as much as the source. A GFS bolted tank for drinking water storage keeps potable water pure and protected, and it avoids the rust, leakage and constant upkeep that older tank types bring.
NSF/ANSI 61 compliant coating30+ year service lifeModular bolted assemblyCorrosion-proof glass enamel
What Is a GFS Bolted Tank?
A GFS bolted tank (Glass-Fused-to-Steel, sometimes called a glass-lined or enamel bolted tank) is built from steel sheets whose surface is coated with a silicate glass enamel and fired at 820 to 930 °C. The heat bonds the glass to the steel at a molecular level, so a single panel carries the strength of steel and the inert, non-porous surface of glass.
Those panels are enameled in the factory, shipped flat, and bolted together on site. There is no on-site welding, no field-applied toxic coating, and no 28-day concrete cure. The tank goes up in weeks rather than months, and it meets the hygiene bar that drinking water demands.
Why Choose a GFS Bolted Tank for Drinking Water Storage?
1. Certified safe for potable water
The enamel coating is inorganic and non-toxic. On tanks built to NSF/ANSI 61 (and WRAS where local rules require it), the lining is verified independently as safe for long-term contact with drinking water. You can show compliance on paper instead of assuming it.
2. Zero leaching, pure taste
Concrete can leach lime and hold contaminants. Painted steel can shed liner material. The glass layer does neither, because it does not react with the water. Stored water keeps its clarity, smell and taste.
3. Bacteria and algae have nothing to grip
The fired enamel is smooth and glossy (about 6.0 on the Mohs scale). Biofilm, algae and scale have no surface to cling to. That means cleaner water, easier washing, and fewer cleaning chemicals over the tank's life.
4. Built to last 30+ years
Organic coatings peel, blister and break down. Glass does not. A correctly specified GFS bolted tank runs 30 years or more with little maintenance, which protects public health and keeps lifecycle cost down.
5. Fast, bolted on-site assembly
Pre-enameled panels arrive ready to assemble. Installation is typically about half as fast as concrete and far quicker than field-welded steel. There is less weather delay and no coating fumes on site, which matters when a community needs water soon.
6. Easy to expand, relocate and recycle
Need more capacity next year? Add panels. Site changing? Take it apart and move it. At end of life, both steel and glass are recyclable. The tank grows and shifts with the project.
Technical Specifications
| Parameter | Typical value |
| Panel coating | Glass enamel fused at 820–930 °C |
| Coating thickness | 0.25 – 0.45 mm |
| Surface hardness | 6.0 (Mohs) |
| Adhesion | ≥ 3,450 N/cm² |
| pH resistance | Standard 3–11 (special formula 1–14) |
| Holiday (pinhole) test | 100% factory inspection at 1,500 V+ |
| Permeability | Gas- and liquid-tight |
| Service life | 30+ years |
| Capacity range | from ~20 m³ up to 20,000+ m³ (custom) |
| Compliance | NSF/ANSI 61, WRAS, ISO 28765, AWWA D103-09 |
GFS vs Concrete vs Field-Welded Steel
| Factor | GFS bolted tank | Poured concrete | Field-welded steel |
| Potable-water certification | NSF/ANSI 61 & WRAS capable | Needs sealants; leaching risk | Needs field-applied liner |
| Corrosion (incl. coastal) | Excellent (inert glass) | Moderate (rebar spalling) | Low (needs paint/sandblast) |
| Biofilm / bacteria resistance | Superior (non-porous) | Low (porous matrix) | Moderate (liner dependent) |
| Install time | Weeks | Months (curing) | Months (welding/coating) |
| Expandable / relocatable | Yes | No | No |
| Design life | 30+ years | 10–15 years | 15–20 years |
Applications of GFS Drinking Water Tanks
- Municipal and community water supply: a reliable reserve for towns and cities.
- Rural and remote communities: flat-pack panels reach off-grid sites by truck.
- Emergency and reserve storage: rapid deployment when infrastructure fails.
- Industrial process water: clean feed water for plants and factories.
- Agriculture and livestock: safe watering for crops and animals.
Custom Sizes & Capacities
Every site is different. We engineer each GFS bolted tank for drinking water storage to your required volume, footprint and roof type (fixed, conical, aluminium dome or membrane), with optional insulation, ladders, manways, level gauges and overflow systems. Tell us your daily demand and we will size both the tank and the foundation load for you.
Why Work With Us
- Direct manufacturer with factory enameling, in-house R&D and full quality control.
- International standards: design and testing to NSF/ANSI 61, ISO 28765, AWWA D103 and EN1090.
- 100% factory holiday test: every panel is checked at 1,500 V or higher before it ships.
- Global delivery and support: panels to your port, with installation guidance on request.
- 30+ year asset with low lifecycle cost, low maintenance and full recyclability.
Frequently Asked Questions
What is a GFS bolted tank?
A GFS (Glass-Fused-to-Steel) bolted tank uses steel panels fused with a silicate glass enamel at 820–930 °C, creating a permanent, non-porous, corrosion-proof barrier. Panels are bolted on site, making the tank modular, expandable and quick to install.
Is a GFS tank safe for drinking water?
Yes. The enamel is inorganic and non-toxic, and when certified to NSF/ANSI 61 (and WRAS where required) it is approved for potable-water contact under international standards.
How long does a GFS drinking water tank last?
A properly specified tank delivers 30+ years of service because the glass coating cannot peel, blister or degrade like paints and epoxy liners.
Can the tank be expanded later?
Yes. As a bolted modular system, capacity can be increased by adding panels, or the tank disassembled and relocated.
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