I recently had water leak from the pipe connector that connects the faucet and the dishwasher under the kitchen sink. There was a cabinet under the sink, and there was a big hole in the cabinet's bottom (for pipes to go through):
Thus, the water got through the hole to the floor and damaged it. It was kind of hard to detect the leak because it was small and the leaked water got hidden under the cabinet.
My question is that Is there any thing I could do so that if there is water leak, the water will go out of the cabinet and be visible, instead of going underneath it? The goal is just to detect the leak as soon as possible.
Best Answer
Have you ever heard the phrase "Lightning never strikes twice"?
I think you're trying to prepare for an accident that is unlikely to happen again.
Sure, you can re-floor the cupboard, wedge it slightly at the back to ensure it slopes towards you, cut as best you can round the pipes, perhaps keep a fillet as insert round the back of the larger pipe, then gob it all in with silicone, including tanking the edges so the only way water can go is out the cupboard door. Don't use good glue & don't run the silicone underneath except for a couple of stabilising dots, just in case you do ever need it out again.
Then wait to see if it ever happens again. For most people, two leaks in a lifetime would be a fair average… and in two different places, unless they have a poor fix the first time.
As mentioned in comments, you could tie a small piece of cloth round each & see if one shows signs of damp &/or mould… but your cold feed is likely to sweat (condensation will form) in humid weather, so that could be misleading.