What test is recommended after a storm and sanitary system passes the water test?

The recommended test after a storm and sanitary system passes the water test is the smoke pressure test. This test is significant because it helps in identifying any leaks or breaches in the plumbing system that could allow gases or odors to escape. Smoke pressure testing involves introducing a non-toxic smoke into the piping system; if any smoke escapes from joints, cracks, or other points of failure, it indicates that there are potential issues requiring attention. This helps ensure the integrity of the plumbing system and compliance with health and safety codes.

In terms of the alternative testing methods mentioned, flood tests are primarily used to check the drainage capabilities of a particular fixture or assembly but do not assess the system's overall airtightness. Air pressure tests are useful in confirming the integrity of existing systems, but they typically aren't the immediate follow-up to a water test. The hydraulic test focuses on determining the system's ability to handle expected pressures and flows, which is different from assessing for gas leaks. Thus, the smoke pressure test is specifically tailored to evaluate potential leaks and ensure system integrity after the initial water test.