{"id":15,"date":"2012-01-10T16:15:04","date_gmt":"2012-01-11T00:15:04","guid":{"rendered":"http:\/\/cityraininc.wordpress.com\/?p=15"},"modified":"2015-05-10T14:29:30","modified_gmt":"2015-05-10T14:29:30","slug":"closing-test-cocks-on-the-double-check","status":"publish","type":"post","link":"https:\/\/www.cityraininc.com\/staging\/closing-test-cocks-on-the-double-check\/","title":{"rendered":"Closing Test Cocks on the Double Check."},"content":{"rendered":"

\"Test<\/a><\/p>\n

So you’ve turned on your sprinkler system yourself in the spring and have gotten squirted in the face by one to four full force jets. You jump up from the valve box furious at your incompetent sprinkler guy who obviously didn’t winterize correctly. Now you’re positive your backflow preventer has a freeze break.<\/p>\n

Well, let’s check the test cocks first. Take a look at this photo (click on to enlarge). The flathead screwdriver is inserted into the slot of a test cock. There are four test cocks on every double check valve assembly, (only 3 are visible here). When a system is winterized, the water is shut off and blown out with a compressor or drained. The test cocks should all be opened to drain the backflow and left open all winter. They should be turned at a 45 degree angle, as well as the handles. Ball valves trap water in tiny spaces at the top of the valve\u00a0when fully open or closed.\u00a0This small amount of trapped water will expand and crack the brass.<\/p>\n

Another good\u00a0reason they are left open is if the main shut off valve for whatever reason is defective in a way that makes it slowly leak, the sprinkler mainline will eventually refill with water and freeze. If the test cocks are open, at least the water will spill out right away before entering the mainline. Some shut-off valve leaks (weeping) are so slow they\u00a0aren’t detected at time of winterization.<\/p>\n

Note: the backflow preventer and double check terms I use refer to the same device- the brass thingy with two (usually blue plastic coated) handles. Backflow preventer is the generic term, and double check is the specific type of\u00a0 device. You’ll hear the two terms used interchangeably. There should be a separate shutoff valve upstream of the backflow that tees off your house water. Sometimes the backflow itself is the only shutoff. If this is the case, the first test cock cannot be opened to drain because it is upstream of the first ball valve. ( blue handle thingy )<\/p>\n

Anyway- where were we? Oh yeah, let’s close the test cocks. With\u00a0the water off\u00a0stick a flathead screwdriver in that slot in the middle of the test cock. Sometimes the backflow is\u00a0installed in such a position these are hard to get to. You may\u00a0need a small mirror, flashlight, and\/ or a stubby screwdriver. \u00a0Turn in any direction (it will spin around\u00a0both ways) until the slot is perpendicular to the test cock itself (which will be parallel to the big backflow device). Make sure all four are closed. Now turn on the water. If you’re still getting a small squirt, give another slight twist with the screwdriver in either direction until it shuts off completely. If you can’t get it to stop dripping there is something wrong and the test cock should be replaced. Call your sprinkler guy!<\/p>\n","protected":false},"excerpt":{"rendered":"

So you’ve turned on your sprinkler system yourself in the spring and have gotten squirted in the face by one to four full force jets. You jump up from the valve box furious at your incompetent sprinkler guy who obviously didn’t winterize correctly. Now you’re positive your backflow preventer has a freeze break. Well, let’s […]<\/p>\n","protected":false},"author":3,"featured_media":321,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[3,4,7,28,30,33],"class_list":["post-15","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-backflow-preventer","tag-city-rain","tag-double-check","tag-sprinkler-systems-seattle","tag-test-cocks","tag-valve-box"],"_links":{"self":[{"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/posts\/15","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/comments?post=15"}],"version-history":[{"count":0,"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/posts\/15\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/media\/321"}],"wp:attachment":[{"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/media?parent=15"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/categories?post=15"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cityraininc.com\/staging\/wp-json\/wp\/v2\/tags?post=15"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}