Sewer Gas Smoke Test Saves the Day for Restaurant

We were called out to a family pizza restaurant in Orange County Ca by the owner of the restaurant.  They had been suffering from sewer gas issues for years and they were losing business and customers because of it. They had been working with the landlord who had been very helpful and supportive in the effort to solve the problem.  The landlord had multiple plumbers over the years each take a crack at it. Some performing smoke tests, some just recommending certain repairs.  Each one declaring the problem was fixed only to later find out that the problem persisted.  The landlord even hired a "night watchman" to sit in the property overnight for a period of months to verify if indeed the smell was still present.  He did indeed verify just that.

They even had someone come out from some official air quality management agency to take air samples.  Which is funny because typically sewer gas issues are something that comes and goes.  It's not going to be there all the time. There are many variables that will affect whether the smell is present at any one point in time.  So the odds are against you of doing any sort of a one time test and verifying the presence of sewer gas.

I'll give you a for instance. We had an architect who's office complained of sewer gas only at certain times of the year.  Without a doubt, it would go away for months at a time and then all of a sudden it was back with a vengence.  Finally the city was threatening to red tag the building so we were called in and we performed a smoke test.  We located  a cast iron sewer stack behind a toilet hidden in a wall that was split wide open for about 4 feet or more.  Well it was obvious that the hole in the pipe had been like that for years but still the smell would go away for months at a time.  The access point for the sewer gas was always there yet the gas was not always present.  That is quite common and has a lot to do with prevailing wind, doors and windows left open and so on.

Back to Orange County, multiple smoke tests had already been performed and some small leaks found and fixed.  Now the consensus was that it was the adjacent nail salon that was responsible for the leak possibly because there was a shared attic and no solid demising wall.  So we were in essence testing the nail salon looking for a source of sewer gas.  We blew smoke in from the nail salon for an extended period of time without any sign of smoke showing in that business.  Then after approximately a 15 to 20 minute period of time, the pizza restaurant quickly filled with smoke.  Still no smoke showed in the Nail Salon.

As it turned out, there was a shared enclosed void that had an opening above the water heater in the pizza restaurant.  The leak was far away to be sure at the other end of the void and it took time for the void to fill with smoke before it would exit the opening.

There was likely a cut off vent stack hiding at the far end of the void. It was up to the property owner to chase it down at this point.
After years and years of sewer gas issues with I don't know how many contractors and agencies involved, we solved the issue in just a couple of hours.

Superjet Sewer and Drain Cleaning, we're the ones that know what we are doing.
www.Superjetdrains.com