The answer is "YES" with Smoke Testing. Diagnose the problem and you may have an instant repair order!
Here's what plumbers are saying about smoke testing:
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Smoke testing will diagnose tricky odor problems, find dry traps, bad plumbing connections, cracks/holes in pipes, and show direction odors travel out of roof vents. Simply find an exterior clean-out to attach the smoke blower to. Blower may also be used through roof vents or other access if necessary. CLICK HERE for more info on procedures.
Smoke testing is easy to learn and master, and we've just made it easier for you to get started with the Smoke Testing Starter Kit.