Constructing water treatment equipment for harsh environments presents a range of engineering challenges that demand careful material and design considerations. Prolonged exposure to high temperatures can degrade mechanical compounds and accelerate material fatigue, while high salinity—especially in industrial settings—promotes aggressive corrosion that rapidly deteriorates metal surfaces. Corrosive agents such as salt, humidity, and chemicals further compound the problem, requiring specialised coatings, corrosion-resistant materials, or composite materials to ensure durability. Constant sun exposure leads to ultraviolet (UV) radiation damage, which can weaken plastics, degrade insulation, and cause thermal expansion and contraction cycles that stress joints and seals. Balancing cost, longevity, and performance in such environments requires advanced materials engineering, protective design strategies, and often regular maintenance protocols.