Getting a watertight seal between a dishwasher outlet hose and a plastic pipe

Jan 15, 2026 1 Replies

Our old dishwasher failed and we had to buy a new one.



I've connected the inlet and outlet hoses, and after a short rinse cycle (as a test) the outlet hose connection appears to be weeping.



The rubber hose fits over a plastic pipe (maybe 1/2" diameter) that is connected to the sink waste pipe. It was a snug fit. I have tightened the same jubilee clip over the hose that was used for the previous dishwasher, clamping hose to pipe.



Is there anything else that I need to do to make it watertight? I don't want to tighten the jubilee so much that it crushes the plastic pipe.


My approach to this sort of problem is to disconnect the hose from the pipe, thoroughly dry the outside of the pipe and the end part of the inner of the hose, apply silicone grease to the dried part of both, reconnect and tighten clip. Turn on dishwasher and cross fingers.

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