What is the primary purpose of using primer before cementing PVC pipe connections?

Using primer before cementing PVC pipe connections serves a crucial purpose in ensuring a strong bond between the pipe and fittings. The primer's role is to prepare the surfaces for the solvent cement by softening and cleaning them. This process involves chemically etching the hard surface finish of the PVC, making it easier for the cement to penetrate and establish a reliable bond.

When the primer is applied, it effectively removes any contaminants and prepares the surfaces to create a fusion bond when the cement is applied. This fusion is vital because it enhances the strength and durability of the joint, minimizing the risk of leaks or failures in the piping system once it is in use. Thus, opting to use primer is essential in achieving the best possible results in PVC pipe connections.