Backflow definition

Backflow means the backflow of water or other liquids, mixtures, or substances into the distribution pipes of a potable water system from any source other than the intended source of the potable water supply.
Backflow means the flow of water in any pipe or fitting in a direction opposite to the normal direction of flow;
Backflow means the undesirable reversal of flow of water or mixtures of water and other liquids, gases or other substances into the public water systems distribution system from any source or sources other than its intended source.

Examples of Backflow in a sentence

  • All meter protection shall be by an approved Reduced Pressure Principle Backflow Prevention Assembly (RP) at the service connection.

  • Backflow preventer and valves shall be the same size as the pipeline in which they are installed, unless otherwise shown on the plans.• Backflow preventer shut-off valves shall be manufactured from iron or bronze and shall be either resilient wedged gate valves, resilient seated and fully ported ball valves, or resilient seated butterfly valves.

  • The tester shall hold a valid certification as a Backflow Preventer Tester from the local governing authority in which the device to be tested is located.

  • SECTION 20: EROSION CONTROL AND HIGHWAY PLANTING Issue Date: November 18, 2005 Section 20-2.25, "Backflow Preventers," of the Standard Specifications is amended to read: 20-2.25 BACKFLOW PREVENTERS• Backflow preventers shall be one of the reduced pressure principle devices as specified in these specifications and the special provisions.• Backflow preventers shall be factory assembled and shall include 2 check valves, one pressure differential relief valve, 2 shut-off valves and 4 test cocks.

  • An irrigation reduced pressure zone (hereinafter referred to as “RPZ”) is required for any irrigation systems and must be installed by the Developer and/or eventual lot owner and tested in accordance with the Minnesota Department of Health Guidelines for Designing Backflow Prevention Assembly Installations (hereinafter referred to as “Guidelines”).


More Definitions of Backflow

Backflow means the undesirable reversal of flow of water or other substances through a cross-connection into the public water system or consumer's potable water system.
Backflow means the undesirable reversal of the intended direction of flow in a potable water distribution system as a result of a cross connection.
Backflow means the undesirable reversal of flow of water or mixtures of water and other liquids, gases, or other substances into the distribution pipes of the potable supply of water from any source or sources.
Backflow means the flowing back of or reversal of the normal direction of flow of water;
Backflow means flow upstream, that is in a direction contrary to the intended normal direction of flow within or from a water fitting;
Backflow means the flow in the direction opposite to the normal flow or the introduction of any foreign liquids, gases, or substances into the water system of the corporation.
Backflow means a hydraulic condition caused by a difference in water pressure that causes an undesirable reversal of the flow as the result of a higher pressure in the system than in its supply.