{"product_id":"dot-brass-push-to-connect-fittings-1-4ft-3-8ft-repair-kit-tubing","title":"DOT Brass Push to Connect Fittings 1\/4ft \u0026 3\/8ft Repair Kit - Tubing","description":"\u003cp\u003eIn this review of the DOT Brass Push to Connect Fittings 1\/4' \u0026amp; 3\/8' Air Brake \u0026amp; Line Union Repair Kit, the bottom line is simple: this kit is best for mechanics and DIYers who need a compact, ready-made assortment of brass DOT push-in fittings for air brake and pneumatic tubing repairs. The reviewer found the kit notable for its breadth of connector types and straightforward push-to-connect installation, making small on-vehicle repairs and shop bench work faster. However, buyers should weigh occasional reports of mixed sealing performance when deciding for critical high-leak applications.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eComprehensive assortment:\u003c\/strong\u003e Includes multiple unions and push-in sizes so common DOT tubing sizes 1\/4', 3\/8' and 1\/2' are covered for quick repairs without extra parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariety of fittings:\u003c\/strong\u003e Contains unions, straight push-ins, and 90 elbows so the kit handles inline joins and direction changes without separate purchases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrass construction:\u003c\/strong\u003e High-quality brass offers corrosion resistance and better high temperature ductility compared with some cheaper alloys, useful for under-hood and brake-line use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide operating range:\u003c\/strong\u003e Rated from vacuum to 250 psi and -40 F to +200 F, so it suits many pneumatic and air brake systems within those limits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePush-to-connect ease:\u003c\/strong\u003e Tubing seals by pushing in and can be removed, which speeds installation and reduces the need for thread sealant on tube connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePortable case and tube cutter:\u003c\/strong\u003e The included case and cutter keep parts organized and let a technician trim tubing cleanly in the field.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis kit is ideal for garage technicians, fleet maintenance staff, and hobbyists who work on pneumatic systems and need a compact, ready assortment of DOT push-in fittings for copper or compatible tubing in air brake and line repair tasks. The included unions and elbows let shops address common leak and break points on vehicles and equipment without sourcing multiple separate parts.\u003c\/p\u003e\n\u003cp\u003eThose working on mission-critical high-pressure systems above 250 psi or with absolute requirement for guaranteed leak-free performance under all conditions should look to certified OEM fittings and testing. Also, if a user needs metric tube sizes or non-DOT specialty fittings, this kit will not cover those needs.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eWide selection of unions and push-in fittings covers 1\/4', 3\/8' and 1\/2' tube repair needs.\u003c\/li\u003e\n\u003cli\u003eBrass material gives good corrosion resistance and temperature tolerance for automotive work.\u003c\/li\u003e\n\u003cli\u003ePush-to-connect design makes installation fast and removes the need for complex tools.\u003c\/li\u003e\n\u003cli\u003eCase and tube cutter make it a convenient field kit for quick repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSome customers reported mixed sealing performance, so thorough leak testing is advised after installation.\u003c\/li\u003e\n\u003cli\u003eNot suitable for systems that exceed the 250 psi working pressure rating or require non-DOT fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit contents\u003c\/td\u003e\n\u003ctd\u003e2x 1\/4 Unions, 2x 3\/8 Unions, 2x 1\/2 Unions; assorted DOT push-in and 90 elbows\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePush-in sizes\u003c\/td\u003e\n\u003ctd\u003e1\/4', 3\/8', 1\/2' with matching MNPT options\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eBrass\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking pressure\u003c\/td\u003e\n\u003ctd\u003eVacuum to 250 psi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWorking temperature\u003c\/td\u003e\n\u003ctd\u003e-40 F to +200 F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded tools\u003c\/td\u003e\n\u003ctd\u003eTube cutter and storage case\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe DOT Brass Push to Connect kit is a practical, cost-effective repair set for workshops and mechanics who need quick fixes for DOT tubing in air brake and pneumatic systems. It combines a useful range of unions, push-in adapters and elbows with durable brass construction, making it good value for most routine repairs, provided users verify seals and remain within the 250 psi rating.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan these fittings be used with copper tubing?\u003c\/strong\u003e\u003cbr\u003eYes, the kit is designed for DOT tubing and compatible copper tubing commonly used in air brake systems.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the maximum pressure these will handle?\u003c\/strong\u003e\u003cbr\u003eThe fittings are rated from vacuum to 250 psi; do not use them above that limit.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the fittings easy to remove once installed?\u003c\/strong\u003e\u003cbr\u003eYes, push-in fittings seal by push engagement and are designed to allow tube removal when needed for repairs.\u003c\/p\u003e","brand":"TL TOOLEGIN","offers":[{"title":"Default Title","offer_id":48250580500699,"sku":"B09NKL9FW7","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/6101seeJWUL._AC_SL1000.jpg?v=1771063169","url":"https:\/\/gearmusthave.com\/products\/dot-brass-push-to-connect-fittings-1-4ft-3-8ft-repair-kit-tubing","provider":"GearMustHave","version":"1.0","type":"link"}