There is water leakage where the overflow hose enters the basin. How to repair and what type of adhesive material is recommended

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Are you saying that when you fill your lavatory so full that it leak behind the basin? Can you tell me exactly where it leaks? Back to you, Tom

Hi Inverso

Is it leaking from where the neoprene hose connects to the overflow connection or is it leaking from in between where the overflow connection and the sink meet? Both places require different fixes...;)

Back to you...

Mark