Arizona Plumbing Practice Exam

When joining PVC piping, which adhesive is appropriate?

1. Colored solvent cement

2. Purple primer and uncolored solvent cement

3. Clear adhesive

4. Yellow adhesive

The correct answer is: Purple primer and uncolored solvent cement

Using purple primer and uncolored solvent cement is appropriate when joining PVC piping because this combination ensures a strong bond and effective preparation of the surfaces to be joined. The purple primer serves to clean and soften the PVC surface, which enhances the bond between the pipes and fittings. It also serves as a visual indicator that the primer has been applied, helping to verify that proper procedures have been followed. Uncolored solvent cement is specifically formulated for use with PVC and, once cured, forms a durable joint that can withstand the pressures and chemicals often found in plumbing systems. This combination of purple primer and uncolored solvent cement adheres to industry standards and guidelines, ensuring a reliable and long-lasting connection. Other options may not provide the same level of effectiveness for joining PVC. For instance, colored solvent cement can limit the future ability to assess the joint, while clear adhesive may not be suitable for all types of plumbing applications. Yellow adhesive is typically intended for use with different materials, such as ABS, rather than PVC, leading to potential compatibility issues.