If the water heater is leaking one cup a minute and going down the drain, they can shut it off or monitor it until Monday.

A leak is not something to take lightly and for her to ghost you is incredibly ...

So currently the neighbors grey water mostly goes in my driveway, and there appears to be what used to be a toilet that might be leaking sewage in the basement.The floor drains have collection of water.   

In my area the water company offers to forgive excess usage if it was caused by a leak.

Double-tapped breakers, all dishwashers did not function at all, multiple sinks and faucets actively leaked, Improperly installed flooring that had buckled, very high humidity in one units was causing moisture damage, furnaces full of drywall dust, radon systems that were not air-tight in the sump pit, and the list goes on and on.I listed just a few of what would ultimately be the longest repair request I've drafted in my career.  

Leak detector water shut offs can save a lot of damage that would not get reported.11.

-We are dealing with a mysterious leak at the midterm rental that is tying up a lot of our time, energy, and money.

I would also qualify it on no damages that exceed the security deposit.Hopefully you have detailed pictures before renting, and is a good reason for regular inspections to check that HVAC and other equipment is functioning properly, and allows inspection for damage from leaking roofs, etc., as well as tenant damage.

you don't want to be left with a leak from her friend who fixed it.

Had to fix a plumbing leak and replace subflooring in kitchen.