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- Double_check_valve abstract "A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. It is also a valve used in air brake systems on heavy trucks.It consists of two check valves assembled in series. This employs two operating principles: firstly one check valve will still act, even if the other is jammed wide open. Secondly the closure of one valve reduces the pressure differential across the other, allowing a more reliable seal and avoiding even minor leakage.Small valves may be so compact as to be barely noticeable, particularly when they are integrated into the bodies of existing taps (faucets). Larger check valves may be installed with ball valves at the ends, for isolation and testing. Often, test cocks (very small ball valves) are in place to attach test equipment for evaluating whether the double check assembly is still functional.The double check valve assembly is suitable for prevention of back pressure and back siphonage, but is not suitable for high hazard applications. It is commonly used on lawn irrigation, fire sprinkler and combi-boiler systems. If the hazard is higher, even a relatively low hazard such as using antifreeze in the fire sprinkler system, then a more reliable check valve such as a reduced pressure zone device may be mandated.".
- Double_check_valve thumbnail Dcvnormal.png?width=300.
- Double_check_valve wikiPageID "769762".
- Double_check_valve wikiPageLength "2140".
- Double_check_valve wikiPageOutDegree "20".
- Double_check_valve wikiPageRevisionID "676523997".
- Double_check_valve wikiPageWikiLink Air_brake_(road_vehicle).
- Double_check_valve wikiPageWikiLink Air_gap_(plumbing).
- Double_check_valve wikiPageWikiLink Atmospheric_vacuum_breaker.
- Double_check_valve wikiPageWikiLink Backflow.
- Double_check_valve wikiPageWikiLink Backflow_prevention_device.
- Double_check_valve wikiPageWikiLink Ball_valve.
- Double_check_valve wikiPageWikiLink Category:Irrigation.
- Double_check_valve wikiPageWikiLink Category:Plumbing_valves.
- Double_check_valve wikiPageWikiLink Check_valve.
- Double_check_valve wikiPageWikiLink Chemigation_valve.
- Double_check_valve wikiPageWikiLink Fire_sprinkler.
- Double_check_valve wikiPageWikiLink Hydrostatic_loop.
- Double_check_valve wikiPageWikiLink Irrigation.
- Double_check_valve wikiPageWikiLink Pressure_vacuum_breaker.
- Double_check_valve wikiPageWikiLink Reduced_pressure_zone_device.
- Double_check_valve wikiPageWikiLink Water_heating.
- Double_check_valve wikiPageWikiLink File:Dcvnormal.png.
- Double_check_valve wikiPageWikiLink File:Dcvreverse.png.
- Double_check_valve wikiPageWikiLinkText "Double check valve".
- Double_check_valve wikiPageWikiLinkText "double check valve".
- Double_check_valve wikiPageUsesTemplate Template:Backflow.
- Double_check_valve wikiPageUsesTemplate Template:Civil-engineering-stub.
- Double_check_valve wikiPageUsesTemplate Template:Refimprove.
- Double_check_valve wikiPageUsesTemplate Template:Reflist.
- Double_check_valve subject Category:Irrigation.
- Double_check_valve subject Category:Plumbing_valves.
- Double_check_valve hypernym Device.
- Double_check_valve type Device.
- Double_check_valve type Redirect.
- Double_check_valve comment "A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. It is also a valve used in air brake systems on heavy trucks.It consists of two check valves assembled in series. This employs two operating principles: firstly one check valve will still act, even if the other is jammed wide open.".
- Double_check_valve label "Double check valve".
- Double_check_valve sameAs Q244785.
- Double_check_valve sameAs Zwillingsrückschlagventil.
- Double_check_valve sameAs m.03b0jw.
- Double_check_valve sameAs Q244785.
- Double_check_valve wasDerivedFrom Double_check_valve?oldid=676523997.
- Double_check_valve depiction Dcvnormal.png.
- Double_check_valve isPrimaryTopicOf Double_check_valve.