Hello. I had a home recently remodeled to include the kitchen. 'Had a new faucet install. Tenant tells me that when they fill sink to wash dishes then drain the water, the water seeps from under the dishwasher. Any ideal on what this can be? How to fix? They agree they don't use dishwasher so I can disconnect dishwasher. Going over tomorrow and would like some ideas.

Water is probably leaking from the faucet and onto the dishwasher drain hose, running down the drain hose to the bottom of the dishwasher. The water is from the faucet, not from the dishwasher. Disconnecting the dishwasher won't help.

Nothing will beat turning on the faucet and LOOKING UNDER THE SINK to see if the faucet is leaking. Check also if the sink itself or the drain leaks when the sink gets full of water.

Sounds like the faucet is leaking out of a seal to the spout but leaking below rather than upward, if you are not handy to replace rubber rings you will probably end up replacing the faucet with a known good quality product.

When looking under the sink for leak you can wrap a piece of toilet tissue around the pipe or drain hose and it’s easier to tell if there is water. You may not see the water seeping down the hose but the tissue paper will tell almost instantly.

Surprised Vee (OH) didn’t mention this. He is my go to guy for tips and tricks

If the water doesn't show up until they drain the sink then the problem is most likely with the drain line not the water supply lines. If this sink has a disposal check to be sure the DW drain isn't leaking where it attaches to the disposal. Same holds true if there isn't a disposal check the connection where the DW drain line connects to the sink's drain line.

Work the Sprayer.

The DW drain hose is supposed to loop upwards to help prevent backflow. If it does not, drain water can flow back into the DW. If you are disconnecting the DW and its drain hose the problem will go away.