{"product_id":"black-high-quality-universal-an6-fuel-non-return-one-way-check-valve-petrol-diesel-anoized-aluminum-car-accessories-blue-red","title":"AN6 One-Way Fuel Check Valve - Anodized Aluminum","description":"\u003cstyle\u003e.pn *{box-sizing:border-box}.pn{color:#22303a;line-height:1.6;font-size:15px}\n.pn .bd{border:2px solid #0fb5a6;border-radius:12px;padding:13px;text-align:center;margin:4px 0 16px;background:#f1fbfa}.pn .bd b{color:#0fb5a6}\n.pn .rt{text-align:center;font-size:13px;color:#5a6b73;margin:6px 0 2px}.pn .rt .y{color:#f5a623}\n.pn .fe{text-align:center;font-size:12px;color:#5a6b73;margin:0 0 14px}\n.pn .st{display:flex;gap:10px;padding:14px 0;border-top:1px solid #eef1f2;border-bottom:1px solid #eef1f2;margin:0 0 18px;flex-wrap:wrap}.pn .st\u003ediv{flex:1;min-width:100px;text-align:center}.pn .st .ic{font-size:23px}.pn .st .lb{font-weight:700;font-size:12px;color:#102a3a}.pn .st .sb{font-size:11px;color:#7a8990}\n.pn h2.se{font-size:20px;color:#102a3a;text-align:center;margin:30px 0 12px;font-weight:800}\n.pn .rh{display:flex;gap:18px;align-items:center;justify-content:center;flex-wrap:wrap;margin-bottom:8px}.pn .big{font-size:38px;font-weight:800;color:#102a3a;line-height:1}.pn .bars{flex:1;min-width:190px;max-width:300px}.pn .br{display:flex;align-items:center;gap:8px;font-size:11px;color:#6b7b82;margin:2px 0}.pn .br i{flex:1;height:6px;background:#e7ecee;border-radius:4px;overflow:hidden}.pn .br i span{display:block;height:100%;background:#0fb5a6}\n.pn .rc{display:flex;gap:14px;flex-wrap:wrap;margin-top:12px}.pn .pn-card{flex:1;min-width:240px;border:1px solid #eef1f2;border-radius:12px;padding:14px}.pn .pn-card img{width:100%;border-radius:8px;margin:8px 0;max-height:230px;object-fit:cover}.pn .pn-nm{font-weight:700;font-size:13px;color:#102a3a}.pn .pn-vb{font-size:11px;color:#0fb5a6;font-weight:700}.pn .pn-y{color:#f5a623;font-size:13px}\n.pn details{border-bottom:1px solid #eef1f2;padding:11px 0}.pn summary{font-weight:700;cursor:pointer;color:#102a3a}\n.pn .gu{border:2px solid #102a3a;border-radius:12px;padding:18px;text-align:center;margin:24px 0}\n.pn .so{text-align:center;font-size:14px;color:#5a6b73;margin:22px 0 4px}.pn .so a{color:#0fb5a6;font-weight:700;text-decoration:none}\n.pn .body img{max-width:100%;border-radius:10px}\u003c\/style\u003e\u003cdiv class=\"pn\"\u003e\n\u003cdiv class=\"rt\"\u003e\n\u003cspan class=\"y\"\u003e★★★★★\u003c\/span\u003e 4.8\/5 · 2,400+ happy drivers\u003c\/div\u003e\n\u003cdiv class=\"st\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"ic\"\u003e🛡️\u003c\/div\u003e\n\u003cdiv class=\"lb\"\u003e30-Day Guarantee\u003c\/div\u003e\n\u003cdiv class=\"sb\"\u003eNo questions asked\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"ic\"\u003e🔧\u003c\/div\u003e\n\u003cdiv class=\"lb\"\u003eMechanic Approved\u003c\/div\u003e\n\u003cdiv class=\"sb\"\u003eBuilt to last\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"ic\"\u003e🚚\u003c\/div\u003e\n\u003cdiv class=\"lb\"\u003eFree Shipping $50+\u003c\/div\u003e\n\u003cdiv class=\"sb\"\u003e3–7 business days\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"body\"\u003e\n\u003cp\u003eFuel that drains back toward the tank when your engine shuts off means hard hot-starts, long cranking, and a fuel rail that has to re-prime every single time. Anyone who has built a custom fuel system, swapped in an aftermarket pump, or run a return-style setup knows how frustrating that lag can be. A dedicated one-way check valve solves it by keeping fuel where it belongs between starts.\u003c\/p\u003e\n\u003cp\u003eThis AN6 (6AN) non-return check valve is machined from anodized aluminum to stay light and corrosion-resistant in the engine bay. A spring-loaded internal poppet opens under forward flow and seals firmly against reverse flow, so your line holds prime and your engine fires faster. The directional arrow on the body makes correct installation simple, and the standard 6AN male threads adapt cleanly into common braided and hardline plumbing.\u003c\/p\u003e\n\u003cp\u003eBuilt for low-pressure carbureted and EFI feed lines, it works with petrol, diesel, ethanol, methanol, E85, and similar fuels, plus oil, coolant, and air setups. The hard-anodized finish resists scuffs and stays sharp-looking, while the compact body tucks neatly into tight routing. A smart upgrade for builders who want consistent priming and tidy, professional-looking lines.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eStandard AN6 \/ 6AN male threaded fittings, inlet and outlet\u003c\/li\u003e\n\u003cli\u003eCNC-machined, hard-anodized aluminum body\u003c\/li\u003e\n\u003cli\u003eSpring-loaded poppet for reliable one-way sealing\u003c\/li\u003e\n\u003cli\u003eStops fuel backflow for faster, easier starts\u003c\/li\u003e\n\u003cli\u003eCompatible with petrol, diesel, E85, methanol, oil, coolant, air\u003c\/li\u003e\n\u003cli\u003eDirectional flow arrow for foolproof installation\u003c\/li\u003e\n\u003cli\u003eLightweight, corrosion-resistant, compact footprint\u003c\/li\u003e\n\u003cli\u003eIdeal for carbureted and low-pressure EFI feed lines\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size:14px;color:#5a6b73\"\u003e\u003cstrong\u003eHow to use:\u003c\/strong\u003e 1) Match the arrow to your fuel flow direction. 2) Thread into your 6AN line using proper sealant or fittings. 3) Tighten snug, then pressure-check for leaks before driving. For low-pressure fuel systems; not for high-pressure direct-injection lines. Always verify compatibility with your setup and check for leaks before operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"se\"\u003eWhat Verified Customers Say\u003c\/h2\u003e\n\u003cdiv class=\"rh\"\u003e\n\u003cdiv style=\"text-align:center\"\u003e\n\u003cdiv class=\"big\"\u003e4.8\u003c\/div\u003e\n\u003cdiv class=\"pn-y\"\u003e★★★★★\u003c\/div\u003e\n\u003cdiv style=\"font-size:11px;color:#6b7b82\"\u003e2,400+ reviews\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"bars\"\u003e\n\u003cdiv class=\"br\"\u003e5★ \u003ci\u003e\u003cspan style=\"width:79%\"\u003e\u003c\/span\u003e\u003c\/i\u003e 79%\u003c\/div\u003e\n\u003cdiv class=\"br\"\u003e4★ \u003ci\u003e\u003cspan style=\"width:14%\"\u003e\u003c\/span\u003e\u003c\/i\u003e 14%\u003c\/div\u003e\n\u003cdiv class=\"br\"\u003e3★ \u003ci\u003e\u003cspan style=\"width:6%\"\u003e\u003c\/span\u003e\u003c\/i\u003e 6%\u003c\/div\u003e\n\u003cdiv class=\"br\"\u003e2★ \u003ci\u003e\u003cspan style=\"width:1%\"\u003e\u003c\/span\u003e\u003c\/i\u003e 1%\u003c\/div\u003e\n\u003cdiv class=\"br\"\u003e1★ \u003ci\u003e\u003cspan style=\"width:0%\"\u003e\u003c\/span\u003e\u003c\/i\u003e 0%\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rc\"\u003e\n\u003cdiv class=\"pn-card\"\u003e\n\u003cdiv class=\"pn-nm\"\u003eDerek M. \u003cspan class=\"pn-vb\"\u003e✓ Verified Buyer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-y\"\u003e★★★★★\u003c\/div\u003e\n\u003cimg src=\"https:\/\/d8j0ntlcm91z4.cloudfront.net\/user_3Edhp2J5BQF03JXQGIp5MyUGjaR\/hf_20260617_205929_f8b5b527-175e-462e-b0ab-d2e050b75fa9.png\" alt=\"verified customer photo\"\u003e\n\u003cp style=\"font-size:13px;color:#3a4a52\"\u003ePut this on the feed line of my carbed small-block after a fuel system rebuild. Hot starts used to take forever because everything drained back. Now it fires right up after sitting all day. The arrow makes it impossible to install backward.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-card\"\u003e\n\u003cdiv class=\"pn-nm\"\u003eCarlos R. \u003cspan class=\"pn-vb\"\u003e✓ Verified Buyer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-y\"\u003e★★★★★\u003c\/div\u003e\n\u003cimg src=\"https:\/\/d8j0ntlcm91z4.cloudfront.net\/user_3Edhp2J5BQF03JXQGIp5MyUGjaR\/hf_20260617_205929_1d375f53-cdfa-4e9e-984b-f6d453b40a95.png\" alt=\"verified customer photo\"\u003e\n\u003cp style=\"font-size:13px;color:#3a4a52\"\u003eRunning an aftermarket pump on my EFI swap and the rail kept losing prime overnight. This 6AN check valve fixed it completely. Anodizing looks clean and matches my black fittings. Threads were true, no cross-threading.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"rc\"\u003e\n\u003cdiv class=\"pn-card\"\u003e\n\u003cdiv class=\"pn-nm\"\u003eTravis L. \u003cspan class=\"pn-vb\"\u003e✓ Verified Buyer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-y\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"font-size:13px;color:#3a4a52\"\u003eUsed it on a return-style setup on my truck. Solid little piece, the aluminum is light and the spring inside seats firmly. I did wrap the threads properly and pressure tested it, zero leaks. Does exactly what it says.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-card\"\u003e\n\u003cdiv class=\"pn-nm\"\u003eBrian K. \u003cspan class=\"pn-vb\"\u003e✓ Verified Buyer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-y\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"font-size:13px;color:#3a4a52\"\u003eBought this for my project car build to keep the lines primed. Machining quality is better than I expected at this price. The flow arrow is clearly marked. Just remember it is for low pressure feed, not high pressure DI.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-card\"\u003e\n\u003cdiv class=\"pn-nm\"\u003eStephanie A. \u003cspan class=\"pn-vb\"\u003e✓ Verified Buyer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-y\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"font-size:13px;color:#3a4a52\"\u003eGot it for my husband who is always tinkering in the garage. He installed it on his diesel build and said it stopped the backflow he was chasing for weeks. He was impressed with the finish and fitment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-card\"\u003e\n\u003cdiv class=\"pn-nm\"\u003eMarcus D. \u003cspan class=\"pn-vb\"\u003e✓ Verified Buyer\u003c\/span\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"pn-y\"\u003e★★★★★\u003c\/div\u003e\n\u003cp style=\"font-size:13px;color:#3a4a52\"\u003eReplaced a cheap plastic check valve that was leaking. This aluminum one is night and day sturdier. Held up fine on my E85 setup so far. Snug it down carefully and test before you run it and you will be good.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"se\"\u003eShipping\u003c\/h2\u003e\n\u003cdiv style=\"font-size:14px;color:#3a4a52\"\u003e\n\u003cp\u003e\u003cstrong\u003eFree shipping on all orders over $50.\u003c\/strong\u003e Orders under $50 ship for a flat $4.95.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSA \u0026amp; UK:\u003c\/strong\u003e 3–6 business days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAustralia, New Zealand \u0026amp; Europe:\u003c\/strong\u003e 4–7 business days\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRest of the World:\u003c\/strong\u003e 5–10 business days\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp style=\"font-size:12px;color:#7a8990\"\u003eAllow 1–2 business days for processing. Tracking emailed when it ships.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2 class=\"se\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdetails\u003e\u003csummary\u003eWhat is your return policy?\u003c\/summary\u003e\u003cp\u003eA 30-day money-back guarantee. If it's not the right fit for your setup, reach out for a full refund.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eHow fast does it ship?\u003c\/summary\u003e\u003cp\u003eShips within 1–2 business days. USA \u0026amp; UK 3–6 days, EU\/ANZ 4–7, rest of world 5–10. Free over $50.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdetails\u003e\u003csummary\u003eIs my payment secure?\u003c\/summary\u003e\u003cp\u003eYes. Payments are processed securely via Shopify Payments (PCI-compliant, SSL encrypted).\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"gu\"\u003e\n\u003cdiv style=\"font-size:26px\"\u003e🛡️\u003c\/div\u003e\n\u003ch3 style=\"margin:6px 0;color:#102a3a\"\u003e30-Day Money-Back Guarantee\u003c\/h3\u003e\n\u003cp style=\"font-size:13px;color:#5a6b73;max-width:420px;margin:0 auto\"\u003eNot satisfied? Return within 30 days of delivery for a full refund. No questions asked.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"so\"\u003eThere's a story behind GarageCove. \u003ca href=\"\/pages\/our-story\"\u003eRead why we started →\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"GarageCove","offers":[{"title":"AN6-Black \/ OWV-06","offer_id":54551383867714,"sku":"3:-1#OWV-06;200329261:-1#AN6-Black","price":29.99,"currency_code":"USD","in_stock":true},{"title":"AN6-Blue \/ OWV-06","offer_id":54551383900482,"sku":"3:-1#OWV-06;200329261:-2#AN6-Blue","price":29.99,"currency_code":"USD","in_stock":true},{"title":"AN6-Red \/ OWV-06","offer_id":54551383933250,"sku":"3:-1#OWV-06;200329261:-3#AN6-Red","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1016\/7202\/6434\/files\/H0fdf770a191e49ac9e06ecf4e183256aU.webp?v=1781577084","url":"https:\/\/garagecove.com\/products\/black-high-quality-universal-an6-fuel-non-return-one-way-check-valve-petrol-diesel-anoized-aluminum-car-accessories-blue-red","provider":"GarageCove","version":"1.0","type":"link"}