{"product_id":"plastic-one-way-inline-check-valve-4mm-12mm-fuel-gas-water","title":"Plastic One-Way Inline Check Valve 4–12mm | Fuel Gas Water","description":"\u003ch2\u003eWhite Plastic One-Way Inline Check Valve — 4mm \/ 6mm \/ 8mm \/ 10mm \/ 12mm\u003c\/h2\u003e\n\u003cp\u003eKeep your fluid systems flowing in the right direction with this compact, reliable \u003cstrong\u003eone-way inline check valve\u003c\/strong\u003e. Designed for low-pressure hose lines, it automatically blocks reverse flow while allowing forward flow with a minimal cracking pressure of just \u0026gt;0.015 MPA. Whether you're working on a fuel line, water circuit, aquarium, irrigation setup, or small engine system, this valve delivers consistent, hands-free flow control in a lightweight plastic body.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple size options:\u003c\/strong\u003e Available in 4mm, 6mm, 8mm, 10mm, and 12mm hose fittings — choose the size that matches your tubing\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable plastic construction\u003c\/strong\u003e with a silicone valve core (10mm variant) — withstands temperatures up to 160°C\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAcid, oil \u0026amp; ozone resistant\u003c\/strong\u003e — ideal for demanding environments\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBroad fluid compatibility:\u003c\/strong\u003e Suitable for water, petrol, diesel, oils, and other common liquids and gases\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow opening pressure:\u003c\/strong\u003e Activates at \u0026gt;0.015 MPA for smooth, dependable one-directional flow\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact inline design\u003c\/strong\u003e — easy to install directly into existing hose runs with no tools required\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand new condition:\u003c\/strong\u003e 100% new, unused valve included per pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWhite\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic body, silicone valve core\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAvailable Hose Sizes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4mm, 6mm, 8mm, 10mm, 12mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOpening Pressure\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u0026gt;0.015 MPA\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMax Temperature (10mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e160°C\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTotal Length (10mm)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e58mm\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFluid Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWater, petrol, diesel, oils, gas, and other fluids\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePressure Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLow pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 x One-Way Inline Check Valve (in your selected size)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Please allow 3–5 mm tolerance due to manual measurement.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/waterproof-cable-gland-set-pg7-pg9-nylon-connectors-10-pack\"\u003e10-Pack Waterproof Cable Glands PG7 PG9 Nylon Connectors\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-pack-rubber-strain-relief-cord-boot-protector-sleeves-4-6-5-2-6mm\"\u003e10-Pack Rubber Strain Relief Cord Boot Protectors 4.6–6mm\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/34-compartment-double-sided-hardware-storage-box-removable-dividers\"\u003e34-Compartment Double-Sided Hardware Storage Box \u0026amp; Dividers\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/eye-face-protection\" target=\"_blank\" rel=\"noopener\"\u003eOSHA on eye and face protection\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What hose sizes does this one-way check valve fit?\u003c\/h4\u003e\n\u003cp\u003eA: This inline check valve is available in five sizes: 4mm, 6mm, 8mm, 10mm, and 12mm. Simply choose the size that matches your existing hose or tubing inner diameter for a secure, leak-free fit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of fluids is this plastic check valve compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: The valve is compatible with a wide range of liquids and gases, including water, petrol, diesel, oils, and other common fluids. Its acid, oil, and ozone-resistant construction makes it suitable for demanding plumbing, fuel, and irrigation applications.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How does a one-way inline check valve work?\u003c\/h4\u003e\n\u003cp\u003eA: A one-way check valve allows fluid or gas to flow in only one direction. When forward pressure exceeds the opening pressure (\u0026gt;0.015 MPA), the valve opens automatically. If flow reverses or pressure drops, the valve closes to prevent backflow — no manual operation needed.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this valve easy to install?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The inline design means you simply cut into your existing hose line and push each end of the valve onto the hose. No special tools are required, and the compact form factor makes it suitable for tight spaces in plumbing, automotive, aquarium, and garden applications.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What hose sizes does this one-way check valve fit?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This inline check valve is available in five sizes: 4mm, 6mm, 8mm, 10mm, and 12mm. Simply choose the size that matches your existing hose or tubing inner diameter for a secure, leak-free fit.\"}}, {\"@type\": \"Question\", \"name\": \"What types of fluids is this plastic check valve compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The valve is compatible with a wide range of liquids and gases, including water, petrol, diesel, oils, and other common fluids. Its acid, oil, and ozone-resistant construction makes it suitable for demanding plumbing, fuel, and irrigation applications.\"}}, {\"@type\": \"Question\", \"name\": \"How does a one-way inline check valve work?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"A one-way check valve allows fluid or gas to flow in only one direction. When forward pressure exceeds the opening pressure (\u0026gt;0.015 MPA), the valve opens automatically. 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No special tools are required, and the compact form factor makes it suitable for tight spaces in plumbing, automotive, aquarium, and garden applications.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/sdf9i0-k1.myshopify.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Plumbing \u0026 Electrical Parts\", \"item\": \"https:\/\/sdf9i0-k1.myshopify.com\/collections\/plumbing-electrical-parts\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"Plastic One-Way Inline Check Valve 4–12mm | Fuel Gas Water\", \"item\": \"https:\/\/sdf9i0-k1.myshopify.com\/products\/plastic-one-way-inline-check-valve-4mm-12mm-fuel-gas-water\"}]}\u003c\/script\u003e","brand":"QXL","offers":[{"title":"12mm","offer_id":46953684730055,"sku":"183:202170827#12mm","price":9.16,"currency_code":"USD","in_stock":true},{"title":"8mm","offer_id":46953684762823,"sku":"183:202170825#8mm","price":8.95,"currency_code":"USD","in_stock":true},{"title":"6mm","offer_id":46953684795591,"sku":"183:201036875#6mm","price":8.8,"currency_code":"USD","in_stock":true},{"title":"4mm","offer_id":46953684828359,"sku":"183:200982318#4mm","price":8.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0799\/8314\/9255\/files\/S7854164d6f6447e5a7a94cec0e2e19b0K.webp?v=1785944651","url":"https:\/\/qxlcustomerservice.com\/products\/plastic-one-way-inline-check-valve-4mm-12mm-fuel-gas-water","provider":"QXL","version":"1.0","type":"link"}