{"product_id":"castair-1-1-2x1-1-2-inline-check-valve-npt-female-inlet-outlet","title":"Castair 1 1\/2\"X1 1\/2\" Inline Check Valve NPT Female Inlet\/Outlet","description":"\u003ch2\u003eCastair CLB112112 — 1-1\/2\" x 1-1\/2\" Inline Check Valve, NPT Female Inlet\/Outlet\u003c\/h2\u003e\n\n\u003cp\u003eThe CLB112112 is a 1-1\/2-inch by 1-1\/2-inch NPT female inline check valve from Castair. It is the largest unit in the Castair CLB inline check valve series, built for high-volume industrial compressed air distribution systems where main line pipe size reaches 1-1\/2 inches.\u003c\/p\u003e\n\n\u003cp\u003eThis check valve allows compressed air to flow in one direction only. When upstream pressure drops below downstream pressure — on compressor shutdown, during standby, or in multi-compressor installations — the valve closes to prevent backflow. Female NPT connections on both ends thread directly into standard pipe fittings, manifolds, or flanged adapters.\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 Prevents reverse flow in the compressed air line when upstream pressure drops. The check closes automatically — no manual operation required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-1\/2\" NPT Female Both Ends:\u003c\/strong\u003e Threads onto male nipples or male-threaded fittings on each end. Standard pipe threads — no special adapters or custom fittings needed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInline Body:\u003c\/strong\u003e Straight-through installation in the distribution line — no offset connections, no need to cut and reroute pipe around the valve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIndustrial Scale:\u003c\/strong\u003e At 1-1\/2-inch, this unit serves systems with very high air volume flow — large industrial plants, multi-compressor manifolds, high-demand production environments.\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 and light-duty drops\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\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLB1010 (1\" x 1\"):\u003c\/strong\u003e NPT Female — main line industrial\/commercial\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCLB112112 (1-1\/2\" x 1-1\/2\"):\u003c\/strong\u003e NPT Female — high-volume industrial distribution\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 CLB112112\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInlet Size:\u003c\/strong\u003e 1-1\/2\" NPT Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutlet Size:\u003c\/strong\u003e 1-1\/2\" NPT Female\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Style:\u003c\/strong\u003e Inline — straight-through flow path\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 major components since 2016. The CLB112112 is a purpose-built industrial inline check valve from a manufacturer that has been making cast iron air system components in Minnesota for decades. Call 866-217-0063 for help selecting the right check valve configuration 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":53342531682517,"sku":"CLB112112","price":404.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/ChromeInlineCheckValve_5aa35f5a-a0fc-41d3-b7a8-ee81fad01b52.jpg?v=1772652617","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-1-1-2x1-1-2-inline-check-valve-npt-female-inlet-outlet","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}