{"product_id":"taco-221-6-flo-chek-valve-1-1-4-ips-cast-iron","title":"Taco 221-6 Flo-Chek Valve - 1-1\/4\" IPS Cast Iron","description":"\u003cspan style=\"font-size: 14pt;\"\u003e\u003cspan style=\"\"\u003e\u003cspan style=\"font-weight: bold;\"\u003eProduct Data and Manuals:\u003c\/span\u003e\u003cbr\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cul\u003e\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003c\/span\u003e\u003cul\u003e\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003c\/span\u003e\u003cul\u003e\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003c\/span\u003e\u003cul\u003e\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003c\/span\u003e\u003c\/li\u003e\u003c\/ul\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cbr style=\"\"\u003e \u003cspan style=\"\"\u003e For more than 40 years, designers and installers have used Taco Flo-Cheks in forced hot water heating systems to prevent gravity circulation during periods when the boiler is hot, but the space heating zone is not wanted. This makes it possible to use the heating boiler to maintain domestic hot water year-round. You can also use Flo-Cheks in systems with multiple circulator zones to allow heat to flow only into the zones that are calling for heat. In addition, the thumb screw can be opened manually for gravity feed applications, if the main circulator stops operating. \u003c\/span\u003e\u003cbr style=\"\"\u003e \u003cbr style=\"\"\u003e \u003cstrong style=\"\"\u003eFeatures Include:\u003c\/strong\u003e\u003c\/span\u003e\u003cul style=\"\"\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eAutomatically Opens When Circulator Starts Running\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003eCast Iron, Universal Body or Bronze Sweat-In Configuration \u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003e125 PSI Maximum Operating Pressure (862 kPa)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan style=\"font-size: 14pt;\"\u003e277ÃÃú F Maximum Operating Temperature (136ÃÃú C) \u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cbr\u003e \u003cspan style=\"\"\u003e \u003cbr\u003e 221 Taco 1 1\/4\" Flo-Chek Valve\u003cbr\u003e \u003cbr\u003e \u003c\/span\u003e\u003c\/span\u003e\u003cdiv class=\"prod-detail-desc\"\u003e\u003cdiv class=\"prod-detail-desc\"\u003e\n\u003clink rel=\"File-List\" href=\"file:\/\/\/C:%5CDOCUME%7E1%5CBRUCE%27%7E1%5CLOCALS%7E1%5CTemp%5Cmsohtml1%5C01%5Cclip_filelist.xml\"\u003e \u003c!--  [if gte mso 9]\u003e\u003cxml\u003e \u003cw:worddocument\u003e  \u003cw:view\u003eNormal\u003c\/w:view\u003e  \u003cw:zoom\u003e0\u003c\/w:zoom\u003e  \u003cw:punctuationkerning\u003e\u003c\/w:punctuationkerning\u003e  \u003cw:validateagainstschemas\u003e\u003c\/w:validateagainstschemas\u003e  \u003cw:saveifxmlinvalid\u003efalse\u003c\/w:saveifxmlinvalid\u003e  \u003cw:ignoremixedcontent\u003efalse\u003c\/w:ignoremixedcontent\u003e  \u003cw:alwaysshowplaceholdertext\u003efalse\u003c\/w:alwaysshowplaceholdertext\u003e  \u003cw:compatibility\u003e   \u003cw:breakwrappedtables\u003e\u003c\/w:breakwrappedtables\u003e   \u003cw:snaptogridincell\u003e\u003c\/w:snaptogridincell\u003e   \u003cw:wraptextwithpunct\u003e\u003c\/w:wraptextwithpunct\u003e   \u003cw:useasianbreakrules\u003e\u003c\/w:useasianbreakrules\u003e   \u003cw:dontgrowautofit\u003e\u003c\/w:dontgrowautofit\u003e  \u003c\/w:compatibility\u003e  \u003cw:browserlevel\u003eMicrosoftInternetExplorer4\u003c\/w:browserlevel\u003e \u003c\/w:worddocument\u003e\u003c\/xml\u003e\u003c![endif]  --\u003e \u003c!--  [if gte mso 9]\u003e\u003cxml\u003e \u003cw:latentstyles deflockedstate=\"false\" latentstylecount=\"156\"\u003e \u003c\/w:latentstyles\u003e\u003c\/xml\u003e\u003c![endif]  --\u003e\n\u003c\/div\u003e\u003c\/div\u003e\u003cstyle\u003e\u003c!--\/* Style Definitions *\/ p.MsoNormal, li.MsoNormal, div.MsoNormal\t{mso-style-parent:\"\";\tmargin:0in;\tmargin-bottom:.0001pt;\tmso-pagination:widow-orphan;\tfont-size:12.0pt;\t\"Times New Roman\";\tmso-fareast-\"Times New Roman\";}a:link, span.MsoHyperlink\t{color:blue;\ttext-decoration:underline;\ttext-underline:single;}a:visited, span.MsoHyperlinkFollowed\t{color:purple;\ttext-decoration:underline;\ttext-underline:single;}@page Section1\t{size:8.5in 11.0in;\tmargin:1.0in 1.25in 1.0in 1.25in;\tmso-header-margin:.5in;\tmso-footer-margin:.5in;\tmso-paper-source:0;}div.Section1\t{page:Section1;}--\u003e\u003c\/style\u003e\u003cdiv class=\"prod-detail-desc\"\u003e\n\u003c!--  [if gte mso 10]\u003e\u003cstyle\u003e \/* Style Definitions *\/ table.MsoNormalTable\t{mso-style-name:\"Table Normal\";\tmso-tstyle-rowband-size:0;\tmso-tstyle-colband-size:0;\tmso-style-noshow:yes;\tmso-style-parent:\"\";\tmso-padding-alt:0in 5.4pt 0in 5.4pt;\tmso-para-margin:0in;\tmso-para-margin-bottom:.0001pt;\tmso-pagination:widow-orphan;\tfont-size:10.0pt;\t\"Times New Roman\";\tmso-ansi-language:#0400;\tmso-fareast-language:#0400;\tmso-bidi-language:#0400;}\u003c\/style\u003e\u003c![endif]  --\u003e\u003cp class=\"MsoNormal\" style=\"margin-bottom: 12pt;\"\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cspan style=\" font-weight: bold;\"\u003eFrequently Asked Questions\u003c\/span\u003e\u003cspan style=\"\"\u003e\u003cbr style=\"font-weight: bold;\"\u003e \u003c!--        [if !supportLineBreakNewLine]        --\u003e \u003cbr\u003e \u003c!--        [endif]        --\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ctable cellspacing=\"0\" cellpadding=\"0\" border=\"0\" class=\"MsoNormalTable\" style=\"width: 100%;\"\u003e\u003ctbody\u003e\n\u003ctr id=\"product_file_listing\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cspan style=\" font-weight: bold;\"\u003eQ.\u003c\/span\u003e\u003cspan style=\"\"\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cspan style=\"text-decoration: none; color: #0000cd;\"\u003eWhy does my Flo-Chek leak by?\u003c\/span\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cbr\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003eTypically this is caused by debris accumulating on the disk or seat. This would be the case if the valve worked fine when it was first installed. You will have to take the valve apart and clean the seat, disk, and stem to bring the valve back to original. The stem should be vertical. \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 12pt;\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e \u003co:p\u003e \u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"product_file_listing\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cspan style=\" font-weight: bold;\"\u003eQ.\u003c\/span\u003e\u003cspan style=\"\"\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cspan style=\"text-decoration: none; color: #0000cd;\"\u003eWhy is my Flo-Chek or MPV noisy?\u003c\/span\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cbr\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003eNormally a check valve is noisy if the valve is oversized for the flow going through the valve. The flow cannot lift or swing the disk all the way open so the disk bangs back and forth within the body of the valve. \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 12pt;\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e \u003co:p\u003e \u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"product_file_listing\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cspan style=\" font-weight: bold;\"\u003eQ.\u003c\/span\u003e\u003cspan style=\"\"\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cspan style=\"text-decoration: none; color: #0000cd;\"\u003eWhy does my hot water circulate when my Taco pump is off?\u003c\/span\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cbr\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003eSomething has adhered to the Flo-Chek seat or disk. The Flo-Chek is a weighted disk check valve that normally prevents thermosiphoning. That is, it prevents the lighter, hot water from rising to the radiation and the heavier, cool water from sinking, causing a flow in the system without a pump. If the system worked fine before and then started to act up, the disk is stuck or something is on the seats. \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 12pt;\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e \u003co:p\u003e \u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"product_file_listing\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cspan style=\" font-weight: bold;\"\u003eQ.\u003c\/span\u003e\u003cspan style=\"\"\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cspan style=\"text-decoration: none; color: #0000cd;\"\u003eMy house has five zones, each with its own circulator. Hot water is passing into zones that are not calling for heat. Do I have some defective circulators?\u003c\/span\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cbr\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003eIf you are not using zone valves, you need either Flo-Checks or a circulator with an Internal Flow Check (IFC). This is required to prevent \u003ci\u003ethermosyphoning\u003c\/i\u003e, a condition in which lighter, hot water rises, and heavier, cool water sinks, causing a flow in the system. \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 12pt;\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e \u003co:p\u003e \u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr id=\"product_file_listing\"\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\"font-size: 14pt;\"\u003e\u003cb\u003e\u003cspan style=\"\"\u003eQ.\u003c\/span\u003e\u003c\/b\u003e\u003cspan style=\"\"\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/p\u003e\u003c\/td\u003e\n\u003ctd valign=\"top\" style=\"padding: 0in;\"\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cspan style=\"text-decoration: none; color: #0000cd;\"\u003eI have a 3-zone residential system with a 219 Flo-Chek on each zone. The manual override thumb screws are all open ~2 turns. Should these be fully closed?\u003c\/span\u003e \u003co:p\u003e\u003c\/o:p\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003e\u003cbr\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\"\u003e\u003cspan style=\" font-size: 14pt;\"\u003eThe bypass knob should be turned clockwise all the way for normal operation. For bypass mode, thurn the knob counterclockwise until you have reached the position desired. \u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003c\/div\u003e","brand":"Taco","offers":[{"title":"Default Title","offer_id":47344082190509,"sku":"9221","price":69.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0785\/5895\/3645\/files\/220.1.jpg?v=1787902409","url":"https:\/\/www.bostonheatingsupply.com\/products\/taco-221-6-flo-chek-valve-1-1-4-ips-cast-iron","provider":"Boston Heating Supply","version":"1.0","type":"link"}