... new material of PVC2)Size: 1/2'',3/4'',1'',1--1/2'',2'',3'',3--1/2'',4''3)Many color ... novel and be popular for many people.Technical characteristics:1)Easy to install, easy to operate2)Applicable to ... .3)The fluid resistance is small.4)No vibration, and no noise.5)Each valve is pressure tested at ... agriculture, irrigation, industrialapplications, etc. to the drainage system. 1/2-4 plastic ball valve