Yes, approved grades of aluminum are considered acceptable for water storage, specifically for applications like water hauling tanks.
Understanding Aluminum for Water Storage
The suitability of aluminum for storing water depends significantly on the specific grade of aluminum used. Not all aluminum alloys are created equal, and certain grades are manufactured or treated to be safe and resistant enough for contact with potable water.
According to guidelines for acceptable metal water hauling tanks, approved grades of aluminum are listed alongside stainless steel as suitable materials. This indicates that when the correct type of aluminum is selected and processed appropriately, it can be a reliable material for storing and transporting water.
Why Approved Grades Are Important
Using approved grades of aluminum is crucial for water storage because:
- Corrosion Resistance: Approved alloys are designed to resist corrosion and pitting from water exposure, which helps maintain the integrity of the tank and prevents metallic taste or contaminants from leaching into the water.
- Safety Standards: These grades meet specific safety standards and regulations, ensuring they do not pose health risks by releasing harmful substances into the drinking water.
- Durability: Using the correct grade ensures the tank is durable and can withstand the stresses of holding and transporting water.
Just as existing non-stainless steel tanks might require an NSF approved epoxy coating on the inside to be deemed safe for water storage (the same type used in public water tanks), aluminum's suitability relies on starting with an approved grade that inherently meets necessary standards.
Practical Considerations
When considering aluminum for water storage tanks, especially for hauling:
- Ensure the tank is explicitly manufactured from an approved grade of aluminum suitable for potable water contact.
- Check for certifications or compliance with relevant standards (e.g., related to NSF, although the reference specifically mentions NSF for coatings, the principle of approved materials aligns).
- Consider the long-term maintenance requirements, although approved grades are designed for durability.
In conclusion, while not all aluminum is suitable, using approved grades of aluminum makes it an acceptable option for water storage applications like hauling tanks, based on established guidelines.
