Hot Water Tank Leaking From Pressure Valve

water tank
Water tanks are liquid storage containers, these tanks are usually storing water for human consumption. The need for water tank systems is as old as civilized man.
cistern: a tank that holds the water used to flush a toilet
A tank supplying water for water-based fire protection systems.

pressure
The force exerted per unit area
The use of persuasion, influence, or intimidation to make someone do something
coerce: to cause to do through pressure or necessity, by physical, moral or intellectual means :"She forced him to take a job in the city"; "He squeezed her for information"
the force applied to a unit area of surface; measured in pascals (SI unit) or in dynes (cgs unit); "the compressed gas exerts an increased pressure"
a force that compels; "the public brought pressure to bear on the government"
The continuous physical force exerted on or against an object by something in contact with it

leaking
(leak) tell anonymously; "The news were leaked to the paper"
(of secret information) Become known
(leak) soft watery rot in fruits and vegetables caused by fungi
(of a container or covering) Accidentally lose or admit contents, esp. liquid or gas, through a hole or crack
(of liquid, gas, etc.) Pass in or out through a hole or crack in such a way
(leak) an accidental hole that allows something (fluid or light etc.) to enter or escape; "one of the tires developed a leak"

valve
A device for controlling the passage of fluid through a pipe or duct, esp. an automatic device allowing movement in one direction only
control consisting of a mechanical device for controlling the flow of a fluid
A cylindrical mechanism in a brass instrument that, when depressed or turned, admits air into different sections of tubing and so extends the range of available notes
A membranous fold in a hollow organ or tubular structure, such as a blood vessel or the digestive tract, that maintains the flow of the contents in one direction by closing in response to any pressure from reverse flow
a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone

hot
used of physical heat; having a high or higher than desirable temperature or giving off heat or feeling or causing a sensation of heat or burning; "hot stove"; "hot water"; "a hot August day"; "a hot stuffy room"; "she's hot and tired"; "a hot forehead"
extended meanings; especially of psychological heat; marked by intensity or vehemence especially of passion or enthusiasm; "a hot temper"; "a hot topic"; "a hot new book"; "a hot love affair"; "a hot argument"
(of food or drink) Prepared by heating and served without cooling
Having a high degree of heat or a high temperature
Feeling or producing an uncomfortable sensation of heat
characterized by violent and forceful activity or movement; very intense; "the fighting became hot and heavy"; "a hot engagement"; "a raging battle"; "the river became a raging torrent"