{"product_id":"sthangbig-brass-fuel-vent-valve-1-2-nptf-to-5-16-rollover-adapter-corrosion-resistant-easy-install","title":"Sthangbig Brass Fuel Vent Valve 1\/2\" NPTF to 5\/16\" Rollover Adapter — Corrosion-Resistant, Easy-Install","description":"\u003cstrong\u003eSthangbig's 1\/2\" NPTF brass fuel vent valve is a durable rollover vent adapter that secures your gas tank vent line and helps prevent fuel leakage during tip-over events.\u003c\/strong\u003e\n\n\u003cp\u003eThis compact brass adapter converts a 1\/2\" NPTF port to accept a 5\/16\" thread rollover\/vent fitting, providing a corrosion-resistant, easy-to-install solution for small engines, utility vehicles, lawn equipment and portable fuel tanks. Machined from solid brass for long service life, the valve is designed to integrate into existing vent tubing and meet basic safety and containment needs in everyday use.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this valve stop fuel from leaking when a vehicle tips over?\u003c\/h3\u003e\n\u003cp\u003eThe rollover valve contains an internal mechanism that seals the vent opening when the assembly is inverted, reducing the chance of liquid fuel escaping through the vent. During normal operation the vent remains open for air exchange to avoid pressure build-up.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eInternal rollover sealing element that blocks flow when inverted\u003c\/li\u003e\n  \u003cli\u003eMaintains normal venting in upright orientation for pressure equalization\u003c\/li\u003e\n  \u003cli\u003eBrass construction resists corrosion, so the seal stays reliable over time\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat threads and fittings does this adapter fit?\u003c\/h3\u003e\n\u003cp\u003eThis product is specifically machined for 1\/2\" NPTF female ports and provides a 5\/16\" threaded connection for rollover\/vent fittings. It is not compatible with other thread standards, so confirm your tank’s thread type before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/2\" NPTF male thread on the adapter body\u003c\/li\u003e\n  \u003cli\u003e5\/16\" threaded outlet to accept standard rollover vent fittings\u003c\/li\u003e\n  \u003cli\u003eOnly for NPTF threads—verify thread type and pitch prior to installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is installation and maintenance?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: thread the adapter into the tank’s 1\/2\" NPTF port, hand-tighten and finish with a quarter-turn using a wrench for a leak-free seal. Routine maintenance is minimal—inspect the fitting and surrounding tubing for cracks or corrosion and replace if damaged.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eHand-thread then wrench-tighten for a secure, leak-free connection\u003c\/li\u003e\n  \u003cli\u003eIntegrates with existing vent lines without special tools or modifications\u003c\/li\u003e\n  \u003cli\u003ePeriodic visual checks recommended; replace if threads or valve action degrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: This Sthangbig brass fuel vent valve suits DIY mechanics, small-engine technicians, landscapers, and owners of ATVs, lawn tractors, generators and portable fuel tanks who need a compact, corrosion-resistant rollover vent adapter for routine venting and spill-reduction. It’s ideal when you require an NPTF-threaded solution that’s simple to install and built to resist long-term wear.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this adapter compatible with non-NPTF threads?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: No. This product is machined specifically for 1\/2\" NPTF threads and won’t properly seal on other thread types.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install the valve myself without special tools?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Hand-thread it and finish with a wrench; no special tools or modifications are required.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Sthangbig","offers":[{"title":"Default Title","offer_id":48084470005918,"sku":"B0G2CBFHGJ","price":31.98,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/sthangbig-brass-fuel-vent-valve-front-view.jpg?v=1785856478","url":"https:\/\/northtrailauto.ca\/products\/sthangbig-brass-fuel-vent-valve-1-2-nptf-to-5-16-rollover-adapter-corrosion-resistant-easy-install","provider":"North Trail Auto","version":"1.0","type":"link"}