Lisun Electronics Inc. is a leader in lighting and electrical test instruments with global offices in Hong Kong, Shanghai, Los Angeles, and Hangzhou. The document describes Lisun's Water Pressure Test Apparatus (WPD-A) which is used to pressure test water storage type water heaters in compliance with IEC60335/GB4706.12 standards. The WPD-A features a 900L water storage tank, temperature control from 5-85°C, pressure testing up to 2.5MPa controlled automatically via PLC and interface. It includes stainless steel and aluminum construction, power and control systems, flow and pressure sensors, and touch screen interface.