{"product_id":"hemrunk-transfer-tank-vented-fuel-cap-2-npt-threaded-iron-base-spring-loaded-vent-leak-resistant-seals","title":"HEMRUNK Transfer Tank Vented Fuel Cap 2\" NPT Threaded — Iron Base, Spring-Loaded Vent \u0026 Leak-Resistant Seals","description":"\u003cp\u003e\u003cstrong\u003eHEMRUNK transfer tank vented fuel cap is a replacement 2\" NPT threaded diesel tank cap that vents pressure and prevents leaks while allowing air into the tank.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis heavy-duty replacement cap fits transfer tanks and auxiliary diesel tanks that accept a 2\" NPT threaded neck. Built to match common transfer-tank standards, the HEMRUNK cap combines a threaded iron base, internal seals and a spring-loaded vent mechanism to manage tank pressure and protect fuel integrity during transport and storage.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this vented cap protect my transfer tank during filling and transport?\u003c\/h3\u003e\n\n\u003cp\u003eThe vent relieves excess pressure that can build up inside a sealed transfer tank when temperatures change or fuel is added quickly. By allowing controlled airflow, it reduces the chance of tank deformation and minimizes stress on seams and fittings.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSpring-loaded vent opens to release built-up pressure.\u003c\/li\u003e\n  \u003cli\u003eSeals and gaskets prevent liquid fuel from escaping while venting air.\u003c\/li\u003e\n  \u003cli\u003e2\" NPT threaded iron base ensures a tight mechanical fit to the tank neck.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this cap stop fuel leaks and keep contaminants out?\u003c\/h3\u003e\n\n\u003cp\u003eYes — the HEMRUNK cap uses internal seals and a snug iron base to block liquid flow while the venting function remains active for air exchange. The design helps keep dirt and water from entering the tank when the cap is properly seated and locked in place.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eMultiple sealing surfaces reduce risk of seepage in normal conditions.\u003c\/li\u003e\n  \u003cli\u003eRobust iron base provides a secure mechanical connection to the tank thread.\u003c\/li\u003e\n  \u003cli\u003eVent mechanism prevents vacuum formation without exposing fuel to contaminants when closed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow simple is installation and removal for routine service?\u003c\/h3\u003e\n\n\u003cp\u003eInstallation requires no special tools: align the cap lip with the neck groove, press down and rotate clockwise until it seats. Removal follows the reverse motion—press down and rotate counterclockwise—making it quick to access the tank for refueling or inspection.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eTool-free, twist-on installation for fast replacement of common transfer tank caps.\u003c\/li\u003e\n  \u003cli\u003eClear tactile engagement when the cap is fully seated to ensure secure fitment.\u003c\/li\u003e\n  \u003cli\u003eDurable construction withstands repeated service cycles without thread damage.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat tanks and applications is this cap compatible with?\u003c\/h3\u003e\n\n\u003cp\u003eThe cap is engineered for use on transfer tanks, mobile fuel tanks, diesel tanks, auxiliary tanks and some Weather Guard-style tanks that accept a 2\" NPT threaded neck. It serves fleet, agricultural, construction and mobile fueling needs where a vented, leak-resistant cap is desirable.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with most transfer and auxiliary diesel tanks using 2\" NPT thread.\u003c\/li\u003e\n  \u003cli\u003eSuitable for mobile fueling rigs, service vehicles and equipment tanks.\u003c\/li\u003e\n  \u003cli\u003eDesigned as a replacement for popular transfer-tank caps with similar configurations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this cap for? Installers, fleet managers, farmers and contractors who maintain mobile fuel systems will find this HEMRUNK vented cap useful. It’s ideal when you need a reliable, easy-to-service replacement that balances pressure control with leak prevention on 2\" NPT transfer and diesel tank necks.\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: Does this cap fit a 2\" NPT threaded tank neck?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The HEMRUNK cap is designed specifically for 2\" NPT threaded tank necks used on many transfer and auxiliary diesel tanks.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the vent prevent tank vacuum and pressure buildup?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The spring-loaded vent allows air in and relieves excess pressure while seals prevent fuel leakage under normal conditions.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"HEMRUNK","offers":[{"title":"Default Title","offer_id":55165923361111,"sku":"B0DRBFRBJN","price":37.32,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1050\/1524\/7191\/files\/hemrunk-front-view-cap-on-neck.jpg?v=1790359897","url":"https:\/\/britishgarage.co.uk\/products\/hemrunk-transfer-tank-vented-fuel-cap-2-npt-threaded-iron-base-spring-loaded-vent-leak-resistant-seals","provider":"British Garage","version":"1.0","type":"link"}