To repair a solar water tank leak, first shut off the power supply and drain the tank to prevent electrical hazards or water damage. Inspect the tank for visible cracks, corrosion, or loose components. For minor leaks, apply a UV-resistant sealant or a rubber patch specifically designed for solar tanks. If the damage is extensive, replace the affected section using manufacturer-approved parts. Reassemble the tank, refill it, and test for leaks by observing pressure changes or visual signs. Always follow local building codes and safety standards during repairs.

The process prioritizes safety and longevity. Solar water tanks, which account for 15-20% of residential water heating systems in the U.S. (U.S. Department of Energy, 2022), require prompt leak repairs to avoid energy waste and water loss. Leaks can reduce energy efficiency by 20-30%, increasing operational costs (International Energy Agency, 2021). For example, a 2020 study by the American Society of Mechanical Engineers found that undetected leaks in solar tanks can lead to annual water losses exceeding 500 gallons per household, costing $50-$100 in utility bills. UV-resistant sealants and corrosion-resistant materials are critical, as solar tanks endure extreme temperature fluctuations and weather exposure. Replacing damaged sections with certified components ensures compliance with ASME standards, which mandate leak rates below 0.1 gallons per hour under pressure tests (ASME B31.1, 2021). Proactive maintenance extends tank lifespan by 10-15 years, saving 15-20% on replacement costs over time (DOE, 2022). Neglecting repairs risks mold growth, structural damage, and safety hazards, such as electrical shorts from water exposure. Thus, timely leak detection and repair are essential for cost savings, safety, and environmental sustainability.