About: Chemigation valve

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Sometimes called a check valve or a backflow preventer, a chemigation valve is an apparatus designed to protect water supplies from agricultural chemicals used during chemigation, the application of chemicals such as fertilizers and pesticides through irrigation water. Most chemigation valves consist of a spring-loaded check valve, a low pressure drain, an air and vacuum relief valve, and an injection port for introducing the chemicals downstream of the check valve. Many chemigation valves also have a 4-inch inspection port so that a person can reach inside and feel if the check valve is still functional. Some governments require the use of two chemigation valves installed in series if hazardous chemicals are to be injected.

Attributes	Values
rdf:type	yago:BodyPart105220461 yago:Part109385911 yago:PhysicalEntity100001930 yago:Structure105225602 yago:Thing100002452 yago:Valve105395286 yago:WikicatPlumbingValves
rdfs:label	Chemigation valve (en)
rdfs:comment	Sometimes called a check valve or a backflow preventer, a chemigation valve is an apparatus designed to protect water supplies from agricultural chemicals used during chemigation, the application of chemicals such as fertilizers and pesticides through irrigation water. Most chemigation valves consist of a spring-loaded check valve, a low pressure drain, an air and vacuum relief valve, and an injection port for introducing the chemicals downstream of the check valve. Many chemigation valves also have a 4-inch inspection port so that a person can reach inside and feel if the check valve is still functional. Some governments require the use of two chemigation valves installed in series if hazardous chemicals are to be injected. (en)
dcterms:subject	Backflow Plumbing valves Irrigation
Wikipage page ID	771283 (xsd:integer)
Wikipage revision ID	982092759 (xsd:integer)
Link from a Wikipage to another Wikipage	Double check valve Pressure vacuum breaker Irrigation Air gap (plumbing) Backflow Check valve Florida Department of Agriculture and Consumer Services Atmospheric vacuum breaker Plumbing valves Hydrostatic loop Irrigation Fertilizer Pesticide Agricultural chemical Potable water Chemigation Reduced Pressure Principle BFP
sameAs	Chemigation valve Chemigation valve Chemigation valve Chemigation valve
dbp:wikiPageUsesTemplate	dbt:Citation_needed dbt:Refimprove dbt:Reflist dbt:Agri-stub dbt:Backflow
has abstract	Sometimes called a check valve or a backflow preventer, a chemigation valve is an apparatus designed to protect water supplies from agricultural chemicals used during chemigation, the application of chemicals such as fertilizers and pesticides through irrigation water. Most chemigation valves consist of a spring-loaded check valve, a low pressure drain, an air and vacuum relief valve, and an injection port for introducing the chemicals downstream of the check valve. Many chemigation valves also have a 4-inch inspection port so that a person can reach inside and feel if the check valve is still functional. Some governments require the use of two chemigation valves installed in series if hazardous chemicals are to be injected. The following policies require or encourage the installation of these valves: Texas State law Chapter 344.73 in Subchapter D - 1.(b) "An irrigation system which adds any chemical is considered to be a 'high health hazard'. Such an irrigation system must not be connected to any potable water supply except through a reduced pressure principle backflow prevention assembly." Florida's Department of Agriculture and Consumer Services Water Quality/Quantity Best Management Practices for Florida Specialty Fruit and Nut Crops p. 20 specifies that: "Backflow prevention should include a check valve between the irrigation pump and the injection device to prevent backward flow; a low-pressure drain to prevent seepage past the check valve; a vacuum relief valve to ensure that a siphon cannot develop; and a check valve on the injection line." (en)
gold:hypernym	Apparatus
prov:wasDerivedFrom	wikipedia-en:Chemigation_valve?oldid=982092759&ns=0
page length (characters) of wiki page	2799 (xsd:nonNegativeInteger)
foaf:isPrimaryTopicOf	wikipedia-en:Chemigation_valve
is Link from a Wikipage to another Wikipage of	Double check valve Pressure vacuum breaker Air gap (plumbing) Atmospheric vacuum breaker Backflow prevention device Hydrostatic loop
is foaf:primaryTopic of	wikipedia-en:Chemigation_valve

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