Tank-style water heaters (not on-demand ones ... The water might be coming from the temperature and pressure relief valve ...

The pressure was so high that relief valves on water heaters blew off, as well as causing other plumping issues. The high pressure was the result of a plugged valve in the Woodhaven tank.

The main concern with liquid nitrogen is its low temperature and that it is considered an asphyxiant, meaning it displaces ...