... product detail:1. material: aluminum2. ISO9001 and ISO140013. such kind of die-casting aluminum gas valve is for gas water ... heater manufacturer4. market: Germany, Japan, Poland, Italy, France,Hongkong, China and ... , Panasonic, Riello, Thermowatt, Fotile, Karcher, Gaasu, Sengoku and other famous companies home and overseas gas valve for gas water heater