For how many minutes shall the DWV system be tested by air and water?

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Multiple Choice

For how many minutes shall the DWV system be tested by air and water?

Explanation:
Testing a DWV system by air and by water is about confirming there are no leaks in joints and fittings. You seal the system and pressurize it with air and hold the pressure for a set time to see if it holds, then you fill the system with water and observe for leaks for a set time. In this context, both the air test and the water test are specified to be 15 minutes. This duration gives enough time to reveal slow leaks without making the test impractically long. So the required duration is 15 minutes.

Testing a DWV system by air and by water is about confirming there are no leaks in joints and fittings. You seal the system and pressurize it with air and hold the pressure for a set time to see if it holds, then you fill the system with water and observe for leaks for a set time. In this context, both the air test and the water test are specified to be 15 minutes. This duration gives enough time to reveal slow leaks without making the test impractically long. So the required duration is 15 minutes.

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