... , new material of PVC2)Size: 1/2'',3/4'',1'',1--1/2'',2'',3'',3--1/2'',4''3)Many color available you ... for many people.Technical characteristics:1)Easy to install, easy to operate2)Applicable to the regular operation, open and ... yearsApplication: applies to Swimming pool, wastewater treatment, aquaculture, agriculture, irrigation, industrialapplications, etc. to the drainage system. 1/2-4 plastic ...