Good thing you found the damage finally. I'm wondering what caused it. This kind of pipes normally last like forever

_______________

Expert DIY in-law took one look, exclaimed, "RATS !! Complain to your cats !!"

But so much damage must have taken a long, long time to accumulate...

{ Shakes head... }

When settled, I've a can of 'expanding foam' for the hole. I'll put a 'shield' over pipe on kitchen side to prevent it making a 'Sci-Fi Horror' mess behind sink.

And I've two tubes of black 'exterior' silicone for the kitchen side of dish-washer's through-wall hole, as I am not convinced that is sealed despite much silicone on the outside ...

The damp has rusted the kitchen unit's adjustable feet, so I'll take weight with 'diamond' car-jack and replace them, one by one...

{ Shakes head again... }

Stay Safe, Stay Well !!

_______________

Water leaks can be really damaging. I didn't know that water damage had ruined the floor under the kitchen sink. Glad you tackled that one Nik !

_______________