Backpressure definition

Backpressure means a pressure (caused by a pump, elevated tank or piping, boiler, or other means) on the consumer's side of the service connection that is greater than the pressure provided by the public water system and which may cause backflow.
Backpressure means any elevation of pressure in the downstream piping system (caused by pump, elevated tank or piping, steam and/or air pressure) above the water supply pressure at the point which would cause, or tend to cause, a reversal of the normal direction of flow.
Backpressure means the flow of water or other liquids, mixtures or substances under pressure into the distribution pipes of the Public Potable Water Supply System from any source or sources other than the intended source.

Examples of Backpressure in a sentence

  • Back-pressure arises from the presence of ice shelves and is particularly affected by melting adjacent to the grounding line (Goldberg and others, 2012a,b).


More Definitions of Backpressure

Backpressure means the phenomenon that occurs when the customer's pressure is higher than the supply pressure. This could be caused by an unprotected cross connection between a drinking water supply and a pressurized irrigation connection, a boiler, a pressurized industrial process, elevation differences, air or steam pressure, use of booster pumps or any other source of pressure.
Backpressure means an elevation of pressure downstream of the distribution system that would cause, or tend to cause, water to flow opposite of its intended direction.
Backpressure means the resulting backflow of contamination, polluted, or otherwise unacceptable quality water from a plumbing fixture or other customer source(s) into a public water supply system due to a greater pressure within the customer's water system. (See FIG. 4-2). FIG. 4-2 Example: Only the valve at A separates the potable and the sea water systems aboard a vessel. The vessel's potable water system, at B, is being filled from the public water supply system at C which is delivering water at a pressure of 60 psi. At the same time, the sea water fire fighting system is activated, which provides sea water at a pressure of 120 psi. If valve A is open, or leaks, the sea water will be forced into the public water supply system.
Backpressure means backflow caused by connection of a public water system to a non-potable system which is operating under a higher pressure than the public water system. The cause of the higher pressure includes, but is not limited to, a pump, boiler, elevation difference, or air or steam pressure.
Backpressure means hydraulic or atmospheric pressure higher than the supply pressure, caused by a pump, elevated tank, boiler, or other means that may cause backflow.
Backpressure means a condition in which the owner’s system pressure is greater than the supplier’s system pressure.
Backpressure means a form of backflow that occurs when any elevation of pressure in the downstream piping system (by pump, elevation of piping, steam and/or air pressure) above the supply pressure at the point of consideration would cause or tend to cause a reversal of the normal flow.