{"product_id":"miraco-186-valve-repair-kit-blue-521b-valve","title":"Miraco 186 Valve Repair Kit for the Blue 521B Valve","description":"\u003cp\u003eMiraco lists part \u003cstrong\u003e186\u003c\/strong\u003e as the \u003cem\u003evalve small parts box\u003c\/em\u003e. It is the repair kit for the \u003cstrong\u003eblue 521B valve\u003c\/strong\u003e — several parts and components in one box, enough to rebuild the working internals rather than buy a whole new valve.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is in the box\u003c\/strong\u003e\u003c\/p\u003e\u003cdiv style=\"overflow-x:auto;margin:18px 0;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:auto !important;font-size:0.93em;min-width:420px;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align:left;padding:7px 8px;border-bottom:2px solid #b9902a;font-weight:700;color:#8a6a1f;white-space:nowrap;\"\u003ePart\u003c\/th\u003e\n\u003cth style=\"text-align:left;padding:7px 8px;border-bottom:2px solid #b9902a;font-weight:700;color:#8a6a1f;white-space:nowrap;\"\u003eWhat it is\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;font-weight:600;white-space:nowrap;\"\u003e516\u003c\/td\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;\"\u003eLower arm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;font-weight:600;white-space:nowrap;\"\u003e515\u003c\/td\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;\"\u003eUpper arm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;font-weight:600;white-space:nowrap;\"\u003e513\u003c\/td\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;\"\u003ePlunger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;font-weight:600;white-space:nowrap;\"\u003e512\u003c\/td\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;\"\u003ePlunger seat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;font-weight:600;white-space:nowrap;\"\u003e511\u003c\/td\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;\"\u003eLock pin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;font-weight:600;white-space:nowrap;\"\u003e509\u003c\/td\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;\"\u003eLow pressure orifice, 3\/8 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;font-weight:600;white-space:nowrap;\"\u003e583\u003c\/td\u003e\n\u003ctd style=\"padding:7px 8px;border-bottom:1px solid #e6e1d4;vertical-align:top;\"\u003eHigh pressure orifice, 3\/16 in.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003cdiv style=\"border-left:4px solid #b9902a;background:#fdf8e9;padding:16px 18px;margin:18px 0;border-radius:4px;\"\u003e\n\u003cp style=\"margin:0 0 8px;font-weight:700;color:#8a6a1f;\"\u003eBoth orifices are in the box, and the sizes matter\u003c\/p\u003e\n\u003cp style=\"margin:0;line-height:1.7;\"\u003eThis is what sets the 186 apart. Miraco’s own parts list gives \u003cstrong\u003e509 as the 3\/8 in. low pressure orifice\u003c\/strong\u003e and \u003cstrong\u003e583 as the 3\/16 in. high pressure orifice\u003c\/strong\u003e, and both are in this kit. So one box covers a blue valve whether it is fed off a low pressure line or a high pressure one — you fit the orifice that matches your water instead of ordering a different part. Nobody else publishes those two sizes, and they are the quickest way to tell at a glance which orifice is already in your valve.\u003c\/p\u003e\n\u003c\/div\u003e\u003cp\u003e\u003cstrong\u003eBlue or grey? Check the body before you order.\u003c\/strong\u003e This kit is for the blue 521B. A \u003cstrong\u003egrey\u003c\/strong\u003e valve is the 521 and takes the \u003ca href=\"\/products\/miraco-189-valve-repair-kit-grey-521-valve\"\u003e189\u003c\/a\u003e instead. The two do not substitute. If you are unsure, \u003ca href=\"\/blogs\/waterer-help\/miraco-521-valve-blue-vs-grey-leaks-and-repair\"\u003eour blue versus grey guide\u003c\/a\u003e walks through it, and if the only marking you can find is a phone number moulded into the cap, \u003ca href=\"\/pages\/miraco-valve-cap-phone-number-641-236-5822\"\u003ethat page explains what you are looking at\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eA note on the part numbers.\u003c\/strong\u003e Miraco suffixes several of these by valve colour — you will see 677B, 678B, 679B and 681B on the blue and the same numbers with a G on the grey. If you are cross-referencing an old invoice, the letter is telling you the colour, not a different part.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRepair or replace?\u003c\/strong\u003e The kit is the inexpensive route when the valve body is sound and the internals have had their day. If the body is cracked or the threads are gone, the complete valve is the \u003ca href=\"\/products\/miraco-part-521b-for-40-80-psi-old-style\"\u003eblue 521B\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eNot sure which pieces yours needs? \u003ca href=\"\/pages\/contact\"\u003eTell us what the valve is doing\u003c\/a\u003e and we will work it out with you.\u003c\/p\u003e","brand":"Miraco","offers":[{"title":"Default Title","offer_id":54110912577731,"sku":"186","price":33.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0682\/1894\/5731\/files\/186_open_2598abe7-3fab-4121-963e-768184fe9c61.png?v=1793394323","url":"https:\/\/www.petecosupply.com\/products\/miraco-186-valve-repair-kit-blue-521b-valve","provider":"PeteCo Supply, LLC. ","version":"1.0","type":"link"}