{"title":"In-Line Check Valves","description":"\u003cp\u003eShop in-line check valves for industrial fluid-control systems where flow must move in one direction while reverse flow is automatically restricted. This collection includes Midland Industries in-line check valves in brass, bronze, and stainless steel, with multiple threaded connection styles and sizes for a range of piping and equipment applications.\u003c\/p\u003e\n\u003ch2\u003eIn-Line Check Valves for Backflow Prevention\u003c\/h2\u003e\n\u003cp\u003eIn-line check valves are installed directly in the flow path and operate automatically as system pressure changes. Forward pressure opens the valve, while reverse pressure forces it toward the closed position, helping prevent unwanted backflow through piping, pumps, equipment, and other system components.\u003c\/p\u003e\n\u003ch2\u003eBrass, Bronze and Stainless-Steel Check Valves\u003c\/h2\u003e\n\u003cp\u003eAvailable body materials include brass and cast bronze for many general-purpose fluid applications, along with 304 stainless-steel options where additional corrosion resistance is required. The collection also includes selected Y-pattern strainer check-valve configurations.\u003c\/p\u003e\n\u003cp\u003eThreaded connection options include FNPT, FPT, and FIP configurations, with nominal sizes ranging from compact fractional sizes through larger industrial connections.\u003c\/p\u003e\n\u003ch2\u003eChoosing an In-Line Check Valve\u003c\/h2\u003e\n\u003cp\u003eBefore ordering, confirm the nominal size, inlet and outlet connection types, body material, pressure rating, cracking pressure, seal compatibility, operating temperature, and intended fluid. These specifications determine whether the valve is appropriate for the system and operating conditions.\u003c\/p\u003e\n\u003cp\u003eFor other backflow-control designs, browse our complete \u003ca href=\"\/collections\/check-valves\"\u003echeck valves\u003c\/a\u003e collection or our \u003ca href=\"\/collections\/swing-check-valves\"\u003eswing check valves\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"949435","title":"949435 Inline Check Valve, 2 in Nominal, FPT x FPT, 304 Stainless Steel Body, Domestic","description":"\u003cp\u003eInline Check Valve, 2 in Nominal, Connection Type: FPT x FPT, 304 Stainless Steel Body, Fluoroelastomer Seal, Lead-Free\/Contains Lead: Lead-Free, Domestic, Additional Information: Stainless Steel Stopper, Spring, Cap, Nut, Polyethylene Washer\u003c\/p\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":46895092826365,"sku":"949435","price":429.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/8785\/2029\/files\/MIDLANDINDUSTRIES_949431.jpg?v=1763674823"},{"product_id":"944402v","title":"944402V In-Line Check Valve, 3\/8 in Nominal, FNPT x FNPT, Brass Body, Domestic","description":"\u003cp\u003eIn-Line Check Valve, 3\/8 in Nominal, Connection Type: FNPT x FNPT, 400 psi, 10 to 210 deg F, Water, Oil, Gas Media, Brass Body, NBR Seat, Fluoroelastomer Seal, Polyetherimide Disc, Lead-Free\/Contains Lead: Contains Lead, Domestic, Additional Information: 0.370 lb Weight\u003c\/p\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":46898234720509,"sku":"944402V","price":54.44,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/8785\/2029\/files\/MIDLANDINDUSTRIES_944402V.jpg?v=1763703751"},{"product_id":"944402","title":"944402 In-Line Check Valve, 3\/8 in Nominal, FNPT x FNPT, Brass Body, Import","description":"\u003cp\u003eIn-Line Check Valve, 3\/8 in Nominal, Connection Type: FNPT x FNPT, 400 psi, 10 to 210 deg F, Brass Body, 100002 NBR Seat, NBR Seal, Polyetherimide Disc, Lead-Free\/Contains Lead: Contains Lead, Import, Additional Information: 1\/2 psi Low Cracking Pressure, Brass End Connection, Stainless Steel Spring, 3\/8-18 Thread Size, 0.4 in End Length, 0.370 lb Weight\u003c\/p\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":46898234753277,"sku":"944402","price":56.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/8785\/2029\/files\/MIDLANDINDUSTRIES_944402.jpg?v=1763703753"},{"product_id":"944401","title":"944401 In-Line Check Valve, 1\/4 in Nominal, FNPT x FNPT, Brass Body, Import","description":"\u003cp\u003eIn-Line Check Valve, 1\/4 in Nominal, Connection Type: FNPT x FNPT, 400 psi, 10 to 210 deg F, Brass Body, 100002 NBR Seat, NBR Seal, Polyetherimide Disc, Lead-Free\/Contains Lead: Contains Lead, Import, Additional Information: 1\/2 psi Low Cracking Pressure, Brass End Connection, Stainless Steel Spring, 1\/4-18 Thread Size, 0.39 in End Length, 0.220 lb Weight\u003c\/p\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":46898279612669,"sku":"944401","price":50.01,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/8785\/2029\/files\/MIDLANDINDUSTRIES_944401.jpg?v=1763705304"},{"product_id":"947141","title":"947141 In-Line Check Valve, 1\/4 in Nominal, FIP x FIP, Cast Bronze Body, Import","description":"\u003cp\u003eIn-Line Check Valve, 1\/4 in Nominal, Connection Type: FIP x FIP, 250 psi, -40 to 450 deg F, 1\/8 in NPT Unloader Port, 1-3\/4 in L Inlet to Outlet, 1\/4 in Opening, Cast Bronze Body, PTFE Seal, Brass Plug\/Stainless Steel Spring\/HNBR O-Ring\/C360 Machined Brass Cap\/Polytetrafluoroethylene Poppet Trim, Lead-Free\/Contains Lead: Contains Lead, Import, Additional Information: 3 psi Cracking Pressure, Vertical or Horizontal, 1-3\/4 in Length, 1.37 in Height, 1\/4-18 Thread Size, 0.290 lb Weight\u003c\/p\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":46898325979389,"sku":"947141","price":59.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/8785\/2029\/files\/MIDLANDINDUSTRIES_947141.jpg?v=1763706875"},{"product_id":"947140","title":"947140 In-Line Check Valve, 1\/8 in Nominal, FIP x FIP, Cast Bronze Body, Import","description":"\u003cp\u003eIn-Line Check Valve, 1\/8 in Nominal, Connection Type: FIP x FIP, 250 psi, -40 to 450 deg F, 1\/8 in NPT Unloader Port, 1-3\/4 in L Inlet to Outlet, 1\/8 in Opening, Cast Bronze Body, PTFE Seal, Brass Plug\/Stainless Steel Spring\/HNBR O-Ring\/C360 Machined Brass Cap\/Polytetrafluoroethylene Poppet Trim, Lead-Free\/Contains Lead: Contains Lead, Import, Additional Information: 3 psi Cracking Pressure, Vertical or Horizontal, 1-3\/4 in Length, 1.34 in Height, 1\/8-27 Thread Size, 0.280 lb Weight\u003c\/p\u003e","brand":"Midland Industries","offers":[{"title":"Default Title","offer_id":46898332958973,"sku":"947140","price":46.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0669\/8785\/2029\/files\/MIDLANDINDUSTRIES_947140.jpg?v=1763707144"},{"product_id":"944403v","title":"944403V In-Line Check Valve, 1\/2 in Nominal, FNPT x FNPT, Brass Body, Import","description":"\u003cp\u003eIn-Line Check Valve, 1\/2 in Nominal, Connection Type: FNPT x FNPT, 400 psi, 10 to 210 deg F, Brass Body, 100003 Fluoroelastomer Seat, Fluoroelastomer Seal, Polyetherimide Disc, Lead-Free\/Contains Lead: Contains Lead, Import, Additional Information: 1\/2 psi Low Cracking Pressure, Brass End Connection, Stainless Steel Spring, 1\/2-14 Thread Size, 0.6 in End Length, 0.320 lb Weight\u003c\/p\u003e","brand":"Midland Industries","offers":[{"title":"Default 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