--- product_id: 438305425 title: "1/2\" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black (12mm OD,2PCS)" brand: "evil energy" price: "£16.87" currency: GBP in_stock: true reviews_count: 13 category: "Evil Energy" url: https://www.desertcart.co.uk/products/438305425-1-2-fuel-check-valve-one-way-inline-non-return store_origin: GB region: United Kingdom --- # 6 bar max working pressure 1/2 inch (12mm) OD precision fit -22℉ to 266℉ wide temp range 1/2" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black (12mm OD,2PCS) **Brand:** evil energy **Price:** £16.87 **Availability:** ✅ In Stock ## Summary > ⛽ Keep your fuel flow flawless — no backflow, no compromises! ## Quick Answers - **What is this?** 1/2" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black (12mm OD,2PCS) by evil energy - **How much does it cost?** £16.87 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/438305425-1-2-fuel-check-valve-one-way-inline-non-return) ## Best For - evil energy enthusiasts ## Why This Product - Trusted evil energy brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **One-Way Flow Assurance:** Stainless steel spring mechanism prevents fuel backflow, maintaining optimal system pressure. - • **Precision Engineered Fit:** Seamlessly integrates with standard 1/2 inch fuel lines for hassle-free installation. - • **Robust Pressure Handling:** Operates reliably up to 6 bar (87 psi) ensuring stable fuel flow under demanding conditions. - • **Durable Aluminum Alloy Build:** Crafted from black anodized 6061-T6 aluminum for superior corrosion and wear resistance. - • **Extreme Temperature Resilience:** Performs flawlessly from freezing -22℉ to scorching 266℉, perfect for all climates. ## Overview The EVIL ENERGY 1/2" Fuel Check Valve is a high-strength, black anodized aluminum inline valve designed for diesel and gasoline systems. Featuring a stainless steel spring for one-way flow, it supports pressures up to 6 bar and operates reliably across a wide temperature range (-22℉ to 266℉). Compact and easy to install with barb connectors, this valve ensures stable fuel delivery and prevents backflow in carburetor and low-pressure fuel systems. ## Description FUEL SYSTEM Visit the Store FUEL SYSTEM Visit the Store EXHAUST SYSTEM Visit the Store EXHAUST SYSTEM CHASSIS SYSTEM Visit the Store CHASSIS SYSTEM COOLING SYSTEM Visit the Store COOLING SYSTEM Review: I don't think you will be disappointed - Great quality, works as advertised. Can be disassembled if need be. Love em! Review: Great quality and great price - These work great and the price is right. ## Features - Specifications: 1/2 inch (12 mm) OD. Minimum upstream pressure: 0.2 bar (2.9 psi). Working pressure range: 0.2–6 bar (2.9–87 psi). Operating temperature range: -22℉ to 266℉ for reliable performance in various conditions. - Material: Made of high-strength 6061-T6 aluminum alloy, the check valve is black anodized for enhanced corrosion and wear resistance. - Feature: This EVIL ENERGY fuel line check valve is equipped with a stainless steel spring that allows fluid to flow in only one direction, effectively preventing fuel backflow and maintaining stable system pressure. - Installation: The one way valve is compact and lightweight with barb inlet/outlet for quick, hassle-free setup in fuel lines. - Application: The EVIL ENERGY fuel check valve is widely used in carburetor and low-pressure fuel systems. It is compatible with various media such as water, petrol, diesel, gas, oil, air, and other fluids.(Methanol is not recommended) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09TT4BVB5 | | Best Sellers Rank | #1,650 in Automotive ( See Top 100 in Automotive ) #1 in Automotive Replacement Exhaust Check Valves | | Brand | EVIL ENERGY | | Brand Name | EVIL ENERGY | | Connector Type | Barb | | Customer Reviews | 4.5 out of 5 stars 3,077 Reviews | | Exterior Finish | Stainless Steel | | Inlet Connection Size | 0.5 Inches | | Inlet Connection Type | National Pipe Tapered | | Item Dimensions | 3.94 x 0.79 x 0.79 inches | | Item dimensions L x W x H | 3.94 x 0.79 x 0.79 inches | | Manufacturer | EVIL ENERGY | | Manufacturer Part Number | EV01342S12BK | | Material | Aluminum | | Material Type | Aluminum | | Maximum Pressure | 6 Bars | | Model Number | EV01342S12BK | | Number of Pieces | 2 | | Number of Ports | 2 | | Outlet Connection Size | 0.5 Inches | | Outlet Connection Type | National Pipe Tapered | | Set Name | 2 | | Size | 1/2 | | Smart Home Compatibility | Not Smart Home Compatible | | Specification Met | ASME, ANSI, API | | Thread Size | 1/2 inch | | Thread Type | NPT | | Unit Count | 2 Count | | Valve Type | Check Valve | ## Product Details - **Brand:** EVIL ENERGY - **Exterior Finish:** Stainless Steel - **Inlet Connection Size:** 0.5 Inches - **Inlet Connection Type:** National Pipe Tapered - **Item dimensions L x W x H:** 3.94 x 0.79 x 0.79 inches - **Material:** Aluminum - **Maximum Operating Pressure:** 6 Bars - **Number of Ports:** 2 - **Outlet Connection Size:** 0.5 Inches - **Outlet Connection Type:** National Pipe Tapered ## Images ![1/2" Fuel Check Valve One Way Inline Non Return Diesel Gasoline Black (12mm OD,2PCS) - Image 1](https://m.media-amazon.com/images/I/612GUm9VBeL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Would this valve be effective in a air/vapor system?** A: yes, the valve can works in air system **Q: Can this be used on a submersible 600gph water pump for the basement?** A: This is a small check valve used for something like allowing a vacuum to be pulled in a single direction. It would not be appropriate for use with a fluid pump unless it is simply being used as part of a venting system to remove air from the pump prior to use. **Q: Do you install before fuel pump or close to carburetor** A: Hi, it depends on your application, it usually installs close to the tank but you can put it closer to the fuel pump if you want. in any event it goes before the fuel pump as your trying to stop flow back. **Q: Will this fit to Mazda Protege 2.0? Reference: 8574-20-309** A: This check valve will fit any 1/4 or 6mm fuel line. ## Customer Reviews ### ⭐⭐⭐⭐⭐ I don't think you will be disappointed *by J***R on May 4, 2026* Great quality, works as advertised. Can be disassembled if need be. Love em! ### ⭐⭐⭐⭐⭐ Great quality and great price *by M***X on April 27, 2026* These work great and the price is right. ### ⭐⭐⭐⭐⭐ Quality vacuum hoses *by R***B on May 3, 2026* Tested them all, they worked great. Solved my issues perfectly. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/438305425-1-2-fuel-check-valve-one-way-inline-non-return](https://www.desertcart.co.uk/products/438305425-1-2-fuel-check-valve-one-way-inline-non-return) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-29*