I have a commercial concrete block building built in the 1950s. There is no basement, just a concrete slab. My tenant just came over because his toilet was completely backed up. Plunging has zero effect. I went back to my shop and flushed my toilet and found that is backed up as well. Plunging my side didn't help either.
Would there be a trap necessarily? If so, would be outside the building, perhaps in the back?
I've owned the building about 40 years and never had any problem with plumbing.
John
EDIT: There is no bathtub or shower, just two toilets and two sinks. The two bathrooms are located at the back of the building, and there is a vent pipe that exits the building on the right side front about a foot off the ground.
Would there be a trap necessarily? If so, would be outside the building, perhaps in the back?
I've owned the building about 40 years and never had any problem with plumbing.
John
EDIT: There is no bathtub or shower, just two toilets and two sinks. The two bathrooms are located at the back of the building, and there is a vent pipe that exits the building on the right side front about a foot off the ground.
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