What is the correct procedure for testing tubing embedded in a concrete floor?

Testing tubing embedded in a concrete floor is critical to ensure the integrity and reliability of the system before the concrete covers it. The correct procedure involves introducing a pneumatic test at a specified pressure—60 psig in this case—before the concrete is poured. This test verifies that the tubing is free from leaks and can withstand the pressures expected during its operational life. Conducting this test prior to encasing the tubing in concrete allows for easier access and remediation if any issues are detected.

Once the concrete is poured, accessing the tubing for repairs or further testing would become significantly more difficult and costly. Therefore, performing this pneumatic test as a precautionary measure ensures the system's functionality and prevents future complications. The specified pressure of 60 psig is typically chosen based on industry standards for such tests to ensure safety and performance.

In contrast, filling the tubing with cold water and leaving it overnight or using hot water for pressure testing may not adequately reveal leaks or weaknesses that could be present. While heating water to certain temperatures can be useful for expanding systems or in specific testing scenarios, it is not the standard approach for pressure testing tubing embedded in concrete. Each alternative lacks the efficacy and reliability that the pneumatic test offers before the concrete curing process begins.