I have a 4" drain in a grocery store, it appears to go into an old trap or a downward 90 and leg is plugged. I have a feeling the pipe/fitting has separated. The k60 with either size cable and the k1500 will not get past the 90. I can see with the camera a 90 with water at the bottom of the 90 but cannnot get around it. I can try jetting but am nervous that if the pipe is separated the jetter will find its way through the joint. Any suggestions.
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