... end: thread and socket 4.structure:ball "ZOOR" New handle PVC ball valve (plastic ball valve, ball valve, PVC valve, check valve, water valve) description:1)Material: Good quality, ... fluid resistance is small, no vibration and noise4)Each valve have been done pressure test in the factory, so ... , aquaculture, agriculture, irrigation, industrialapplications and so on. blue plastic octagonal ball valve