Freezing weather makes a water test impractical, so the DWV rough-in is air tested instead. Which combination of test pressure and duration satisfies the code?

Giải thích

The DWV air test uses a uniform gauge pressure of 5 psi, or the equivalent 10 in mercury column, maintained for at least 15 minutes without any drop. Three psi is below the required pressure and 10 minutes is short of the required duration. Ten psi and 50 psi are far above what a drainage system is intended to see; 50 psi is the water supply test value, not the DWV value, and that much air can blow test plugs out of a fitting.