The water heater is equipped with a temperature pressure relief valve which is a safety device in the event the water heater over heats or builds up excessive pressure, the water heater can discharge the excess pressure through this valve. Connected to the valve should be a discharge pipe.
The clothes dryer has been discharging into the crawl space under this house as can be seen here with the lint accumulation. The clothes dryer should always vent to the exterior of the building.
This home inspection had ductwork that was disconnected. The heating and cooling was discharging into the attic. I first discovered there was a problem when I noticed minimal air flow at the supply registers in some of the rooms.
This photo is from a home inspection on a multi-million dollar home. This is the main sewer line that is severely deteriorated and rusted through with a large opening in it and is leaking raw sewage into the crawl space under the house.
This photo was taken in a garage from a home inspection where the wall covering between the garage and connecting wall of the home was cutout. This opening could allow a fire to quickly accelerate throughout the house.
This photo was from a home inspection where a sharpie marker was drilled out and used for the toilet tank fill tube and held in place with a plastic shopping bag.