@@oreolam5402 A Pressure & Temperature Relief Valve (PTV) is supplied with each GPU water heater. Water will be released through the PTV when water temperature reaches 90˚C or when water pressure reaches 1000 kPa in the inner tank. (It is normal that small amount of water may drip out.) 每部GPU熱水器均附上超溫及超壓感應排放閥 (簡稱PTV) 一枚,當內膽水溫升至90℃或水壓 達至1000 kPa 時,熱水會經PTV排出。(如有 少量水滴出,乃正常現象。)