1.material:ppr 2.connector tpye:thread and socket 3.standard;ANSI,JIS,BS,DIN 4.size: ... no noise.7Each valve is pressure tested at the end after the factory, Lowest leakage rate.8)Quality: Heat, high temperature, extremely long ... , wastewater treatment, agriculture irrigation, industrial applications, etc. 1/2"-4" ppr ball valve