This is in a commercial metal building. There is a significant water leak as the water bills are outrageous. The supply is 3/4 copper pipe. There is no water visible outside anywhere and the ground is very dry.
I believe I found roughly where the leak is under the concrete slab. I cut the water on, and I can hear water leaking into the 4" PVC sewer pipe through an unused and plugged toilet sweep. My theory is the water line is next to the sewer, and the leak washed a hole in the side of the PVC pipe and that is where the water is escaping. I shut the water off and added compressed air to the system and I can hear air leaking into the sewer. I do know sound can travel a very long way through a pipe.
My question is should I get someone with a sewer camera to explore and find exactly where the leak is so I don't go cutting a bunch of holes in the concrete floor? Is my above theory plausible? I have checked every toilet, sink, water fountain there is and I fully believe it is under the slab.
I believe I found roughly where the leak is under the concrete slab. I cut the water on, and I can hear water leaking into the 4" PVC sewer pipe through an unused and plugged toilet sweep. My theory is the water line is next to the sewer, and the leak washed a hole in the side of the PVC pipe and that is where the water is escaping. I shut the water off and added compressed air to the system and I can hear air leaking into the sewer. I do know sound can travel a very long way through a pipe.
My question is should I get someone with a sewer camera to explore and find exactly where the leak is so I don't go cutting a bunch of holes in the concrete floor? Is my above theory plausible? I have checked every toilet, sink, water fountain there is and I fully believe it is under the slab.