Is UV Protection Necessary for Poly Water Tanks?

Poly Tank Degradation Risks

Polyethylene (PE) and polypropylene (PP) water storage tanks can be susceptible to degradation from UV radiation, especially when exposed to direct sunlight. UV light causes the chains of the polymer molecules to break down, leading to a condition known as photo-oxidation. This process can compromise the structural integrity and durability of the tank, potentially causing cracks, brittleness, and leakage.

UV Protection Measures

To mitigate the risks of UV degradation, it is essential to implement UV protection measures when storing water in poly tanks. A popular solution is to wrap the tank with a UV-resistant material, such as a polyethylene-based sheeting or a specialized tank wrap. These products are designed to block or absorb UV radiation, preventing it from reaching the tank surface. Another option is to paint the tank with a UV-resistant coating or use a specially formulated tank wrap with built-in UV protection.

Effective UV Protection Techniques

When selecting a UV protection solution, consider the following factors: the tank’s location, size, and material, as well as the desired level of protection. For example, a tank exposed to direct sunlight for extended periods may require a more robust UV protection solution than one stored in a shaded area. A common technique is to apply a UV-resistant coating with a thickness of at least 150 microns, which can provide effective protection for up to 10 years. Regular inspections of the tank and protection system can help identify potential issues before they become major problems.