WRAS Approved Drinking Water Tanks: Engineering the Standard for Potable Safety
Created on 04.02
WRAS Approved Drinking Water Tanks: Engineering the Standard for Potable Safety
In the 2026 global water infrastructure market, compliance with the Water Regulations Approval Scheme (WRAS) is the non-negotiable benchmark for any equipment connected to the public water supply. For municipalities and industrial developers, a WRAS Approved Drinking Water Tank is more than a storage vessel; it is a certified guarantee that every material in contact with the water will not cause contamination, support microbial growth, or alter the water’s taste and odor.
Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) is a premier global manufacturer of modular bolted tanks, providing a full range of WRAS and NSF/ANSI 61 compliant storage solutions. With over 30 years of expertise, we integrate advanced material science with rigorous UK water regulations to safeguard global drinking water supplies.
WRAS approved drinking water tanks from Center Enamel utilize high-performance Glass-Fused-to-Steel (GFS), Fusion Bonded Epoxy (FBE), and Stainless Steel technologies. Engineered to AWWA D103-09 and ISO 28765 standards, these tanks feature non-porous surfaces that inhibit biofilm formation. With a 30+ year design life, they are the optimal choice for municipal potable water reservoirs requiring 100% compliance with the Water Supply (Water Fittings) Regulations.
1. The Significance of WRAS Approval in 2026
WRAS approval confirms that a water fitting—including the tank’s coating, sealants, and gaskets—satisfies the requirements of the Water Supply (Water Fittings) Regulations.
● Non-Leaching Materials: Ensures that no toxic chemicals, heavy metals, or harmful substances migrate from the tank wall into the potable water.
● Microbial Growth Resistance: WRAS testing (BS 6920) specifically evaluates whether materials promote the growth of bacteria or fungi, a critical factor for long-term biosecurity.
● Organoleptic Stability: Guarantees that the storage environment will not change the appearance, taste, or smell of the drinking water.
2. Technical Decision Matrix: WRAS Compliant Tank Technologies
This matrix establishes why Center Enamel’s bolted technologies are the technical leaders in potable storage.
Feature | Glass-Fused-to-Steel (GFS) | Fusion Bonded Epoxy (FBE) | Stainless Steel (316L) |
Surface Finish | Inert Glass (Mohs 6.0) | High-Adhesion Resin | Self-Healing Passive Layer |
Corrosion Defense | Superior (930°C Fusion) | Excellent (Impact Resistant) | Exceptional |
Best Application | Municipal High-Capacity | Cost-Effective Potable | High-Purity/Industrial |
Maintenance | Zero Recoating | Minimal | Zero |
3. Engineering Purity: The Center Enamel Advantage
We bridge the gap between structural engineering and hygienic safety through a multi-material approach.
● Glass-Fused-to-Steel (GFS): The vitreous enamel coating is physically and chemically fused to the steel at 930°C. This creates a surface as smooth as glass and as strong as steel, preventing the microscopic pitting where bacteria often thrive.
● Fusion Bonded Epoxy (FBE): Our FBE tanks utilize an electrostatic powder coating process that ensures a uniform, high-density barrier. This is a highly cost-effective solution for large-scale municipal water projects without sacrificing WRAS compliance.
● Sealing Integrity: Every WRAS tank is assembled using high-tensile bolts and specialized EPDM or NBR gaskets that have been independently tested and approved for wholesome water contact.
4. Rapid Modular Deployment & Global Reach
One of the primary drivers for the transition from concrete to Center Enamel’s bolted technology is Lifecycle ROI.
● Top-Down Installation: Utilizing PLC-controlled hydraulic jacks, our tanks are assembled at ground level. This eliminates the need for scaffolding, reduces onsite risks, and shortens installation time by 60% compared to traditional concrete.
● Standardization: Components are factory-manufactured under ISO 9001 conditions, ensuring that the WRAS-approved coating quality is consistent and never dependent on on-site weather conditions.
● Expansion & Relocation: Unlike permanent concrete reservoirs, our bolted modular design allows for future height expansion or relocation to meet changing municipal demands.
5. Technical FAQ: WRAS Approved Water Tanks
Q: Is WRAS approval required for all drinking water tanks?
A: In the UK and many international markets following British standards, any tank connected to the public mains water supply must be WRAS approved to prevent contamination of the network.
Q: How does a WRAS approved tank differ from a standard water tank?
A: A WRAS approved tank has undergone rigorous testing (BS 6920) of all its individual components—including the coating and gaskets—to prove they do not support bacterial growth or leach chemicals.
Q: What is the expected lifespan of a GFS WRAS tank?
A: Center Enamel’s GFS tanks are designed for a 30-50 year service life. Because the glass coating is inorganic, it never requires repainting, making it the most sustainable long-term choice.
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