Brick that is molded under pressure, causing it to be uniform and strong.
Pressure
(1) Force exerted upon an opposing body. (2) Compression; squeezing. (3) A condition of distress.
Pressure balance valve
Valve which keeps hot and cold water at the proper temperature and pressure by use of a diaphragm inside the faucet which reacts to increase or decrease the flow to keep it constant.
Pressure balancing
The process of neutralizing pressure differences within a home.
Pressure drop
The loss in static pressure of a fluid (liquid or gas) in a system due to friction from obstructions in pipes, from valves, fittings, regulators, burners, etc, or by a breech or rupture of the system. Pressurization Testing.
Pressure gas welding
Oxyfuel welding process, which can be used in automated welding operations, which heats the surface to the proper temperature and then fuses the parts under sufficient pressure, without use of filler metal.
Pressure gauge
Apparatus to measure the amount of pressure exerted by fluids and gas and are used in systems that have dynamic operating characteristics so that changes must be monitored.
Pressure head
Pressure in a plumbing system. The unit of measure which is the vertical force exerted by water at a depth of one foot.
Pressure loss
The term given for the loss of pressure that occurs whenever water moves through a pipe or when water moves uphill against the force of gravity. If the total pressure loss in a piping system exceeds the available static water pressure the water will not flow.
Pressure reducing valve
A valve that automatically reduces inlet water pressure to a specified value at its outlet under static cold water conditions.
