When pouring concrete over pipes, what must be maintained to prevent damage?

• A. Keep pressure test during pour
• B. Maintain constant temperature
• C. Stop pour if air bubbles appear
• D. Cover pipes with insulation

Answer: (A)

Maintaining a pressure test during the pour keeps the pipe system under load and sealed as the concrete and surrounding material settle around it. The internal pressure helps resist external forces from the newly poured concrete and backfill, and it immediately reveals any leaks or weak joints while the concrete is still fresh. This proactive check protects joints and connections from damage or movement that could occur if pressure isn’t maintained, ensuring the piping remains intact as the encasing material cures. Temperature control and insulation don’t specifically guard the pipe during the pour, and stopping the pour for air bubbles targets concrete voids rather than the integrity of the pipe installation itself.