What is the most common cause of pipe joint failure?

• A. Not clean
• B. Corrosion
• C. Poor alignment
• D. Over-tightening

Answer: (A)

The main idea is that joints fail most often due to improper preparation of the joining surfaces. If pipe ends and fittings aren’t thoroughly cleaned, they carry dirt, oil, grease, or burrs that prevent adhesive or solvent cement from bonding properly. In solvent-welded joints, a clean, dry surface allows the cement to cure and form a strong bond; any contamination creates a weak spot that can leak or fail under pressure. While corrosion, misalignment, and over-tightening can cause failures, they occur less frequently as root causes compared to inadequate cleaning and prep before assembly. So, ensuring clean, dry, deburred surfaces and proper cleaning steps is the key to preventing most pipe joint failures.