{"product_id":"castair-3-4x3-4-inline-check-valve-npt-female-inlet-outlet-clb3434","title":"Castair 3\/4\"X3\/4\" Inline Check Valve NPT Female Inlet\/Outlet CLB3434","description":"\u003ch2\u003eCastair CLB3434 — 3\/4\" x 3\/4\" Inline Check Valve, NPT Female Inlet\/Outlet\u003c\/h2\u003e\n\n\u003cp\u003eThe CLB3434 is a 3\/4-inch by 3\/4-inch NPT female inline check valve from Castair. It sits at the mid-point of the CLB series — larger than the 1\/2-inch CLB1212 for installations with higher flow volume, and a step below the 1-inch CLB1010 used on the largest main lines. If your distribution system runs 3\/4-inch main pipe, this is the inline check valve that matches it.\u003c\/p\u003e\n\n\u003cp\u003eFemale NPT connections on both inlet and outlet thread onto male nipples or fittings for straight inline installation in 3\/4-inch pipe runs. Used wherever one-way flow needs to be enforced in a 3\/4-inch compressed air line — between compressors and a shared receiver, at zone branch points, or as a secondary check on high-cycle installations.\u003c\/p\u003e\n\n\u003ch3\u003eWhat This Unit Does\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne-Way Flow Control:\u003c\/strong\u003e Air passes in the intended direction. On pressure drop or shutdown, the check closes to hold downstream pressure and prevent backflow into the supply side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/4\" NPT Female Both Ends:\u003c\/strong\u003e Standard threads fit 3\/4-inch male NPT nipples and fittings directly — no reducers or adapters for a 3\/4-inch installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInline Body:\u003c\/strong\u003e Straight-through design for clean inline pipe installation without offset connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCastair Inline Check Valve Lineup (CLB Series)\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLB1414 (1\/4\" x 1\/4\"):\u003c\/strong\u003e NPT Female — control lines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLB1212 (1\/2\" x 1\/2\"):\u003c\/strong\u003e NPT Female — small shop and garage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLB3434 (3\/4\" x 3\/4\"):\u003c\/strong\u003e NPT Female — mid-size commercial systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLB1010 (1\" x 1\"):\u003c\/strong\u003e NPT Female — large main lines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLB112112 (1-1\/2\" x 1-1\/2\"):\u003c\/strong\u003e NPT Female — industrial high-volume\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e CLB3434\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 3\/4\" NPT Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 3\/4\" NPT Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Style:\u003c\/strong\u003e Inline — straight-through\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e NPT Female both ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeries:\u003c\/strong\u003e CLB Inline Check Valve\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Castair, Spicer, Minnesota\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cp\u003eWe have sold Castair air system components since 2016. Call 866-217-0063 for help selecting the right inline check valve size and style for your system. Free shipping on qualifying orders, full manufacturer warranty, free technical support.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342532141269,"sku":"CLB3434","price":86.62,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/ChromeInlineCheckValve.1.jpg?v=1772652622","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-3-4x3-4-inline-check-valve-npt-female-inlet-outlet-clb3434","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}