1.size: 1/2''-4'' 2.material:pvc 3.standard: ... new material of PVC2)Size: 1/2'',3/4'',1'',1--1/2'',2'',3'',3--1/2'',4''3)Many color available you ... noise.5)Each valve is pressure tested at the end after the factory, Lowest leakage ... at least 10 yearsApplication: applies to Swimming pool, wastewater treatment, aquaculture, agriculture, irrigation, industrialapplications, etc. to the drainage system. 1/2 ...