CHENNAI: The Chennai Corporation on Tuesday sealed three hotels on Poonamallee High Road for not having diaphragm chambers and letting unfiltered sewage into the main lines.

Based on complaints, Mayor M. Subramanian, who inspected the area, directed that if the hotels did not have such chambers, action would be initiated against them.

The diaphragm chambers help in filtering the solid waste and in their absence the sewer lines get blocked. It also often resulted in sewage overflow on the road.

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