PVC Double Containment Pipe Pressure Testing Guideline

Testing a PVC double containment pipe system after installation helps ensure the system is leak-free and properly functioning. Here are the general steps to test a PVC double containment pipe system:

1. Visual Inspection: Begin by visually inspecting the entire containment system for any signs of damage or improper installation.
2. Clean and dry the system: Ensure both the primary and secondary containment pipes are clean and free of debris. Remove any water or moisture within the system.
3. Seal the ends: Temporarily seal both ends of the primary and secondary containment pipes to create a closed system for testing.
4. Install pressure testing equipment: Connect a pressure gauge and an air supply, such as a compressor, to one end of the secondary containment pipe.
5. Pressurize the system: Gradually increase the air pressure within the secondary containment pipe to the specified test pressure, typically 5 psi above the system’s maximum operating pressure. Reference the manufacturer’s recommendations and local regulations for specific test pressures.
6. Check for leaks: Hold the test pressure for a specified duration, usually about 15 minutes to 2 hours, and monitor the pressure gauge. If the pressure drops significantly, there may be a leak in the system. You can use soap and water solution on all joints and connections to locate any leaks visually. Bubbles will form around the leak site if there is one.
7. Repair and retest: If a leak is detected, depressurize the system, repair the leak, and retest the system to ensure no further leaks are present.
8. Test the primary pipe: Once the secondary containment pipe passes the pressure test, you can follow the same procedure to test the primary pipe.
9. Document the results: Record the test results, including pressure levels, test duration, and any repairs made. This documentation is essential for compliance and maintenance purposes.
10. Reconnect the system: After successful testing, remove the temporary seals and pressure testing equipment, and reconnect the system for its intended use.

Always follow the manufacturer’s guidelines, local regulations, and industry best practices when testing PVC double containment pipe systems. Engage trained professionals to perform the tests and ensure proper safety precautions are followed.