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Question DetailsAsked on 7/29/2017

Water seeping from kitchen floor, removed dishwasher still leaking

Water seeping up through kitchen floor. Plumber came out and said looked like water was leaking from the dishwasher and suggested we replace the dishwasher (it's an old one). Ordered new DW, removed old DW and thoroughly cleaned and dried DW space. Used the sink this morning and now there is water all over the floor in the DW space...soaked through an entire bath towel. Now I know it is definitely not the DW...water seeping from floor in same area, no water in the cabinets so must be coming from the floor/ is on a concrete slab. Any suggestions?

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1 Answer


Assuming no chance this is a leak from outside - rain getting in wall or pooling up and running in over the top of the slab.

Actually, assuming new dishwasher doews not happen to be leaking (unlikely), unless you replaced the feedwater tubing and drain hose too, could be a leak from them.

Simple solution - wipe all over the piping and garbage disposal under the sink so all is dry, then use the sink (both sides if double sided) and then run your hand over all the pipes and garbage disposal to feel for any wet spots - start and bottom and work upwards on wach pipe so if you hti a wet spot you can track the wetness up to its source. If wetness forms (which if a significant would would presumably mean the "floor" of the undersink cabinet is also accumulating water) and it is NOT on the dishwasher discharge hose or water line, then track teh wetness to the joint or spot it is leaking from.

If the dishwasher drain line or waterline (commonly flex plastic or small copper tubing) is leaking, this could make a pooling under the dishwasher - if the undersink cabinet "floor" is dry, then likely leaking in the part in the dishwasher cubby - split or cracked line, or bad connection at the dishwasher.

Of course, a leaking water or drain line in the wall or slab could also be causing this.

Here are a bunch of previoous similar questions (both kitchen leak and water coming in over/through slab) with answers on potential causes and fixes, FYI:

Answered 3 years ago by LCD

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