{"product_id":"castair-3-4npt-male-x-18-metal-flex-hose-va075","title":"Castair 3\/4\"NPT Male x 18\" Metal Flex Hose VA075","description":"\u003cp\u003eThe Castair VA075 is a 3\/4\" NPT Male x 18\" metal flex hose — the vibration-isolating connector between your compressor pump outlet and the tank inlet fitting. The 3\/4\" NPT size fits smaller single-stage compressors in Castair's lineup where the pump discharge port threads at 3\/4\" NPT. At 18 inches, this hose has the right amount of flex length to absorb pump vibration without putting bending stress on either fitting end during operation.\u003c\/p\u003e\n\n\u003ch2\u003eWhy You Need a Metal Flex Hose\u003c\/h2\u003e\n\u003cp\u003eRunning a compressor without a flex hose — or with a damaged, kinked, or work-hardened flex hose — puts vibration stress directly into hard plumbing connections. Compressor pumps vibrate both vertically and laterally during operation. A rigid pump-to-tank connection transfers that vibration into the tank fitting threads, the check valve body, and any downstream hard lines. The result over time is loosening fittings, cracked check valve bodies, and in severe cases, fatigue cracking at tank welds near the fitting. A proper metal flex hose is the correct fix.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/4\" NPT Male Connection:\u003c\/strong\u003e Standard NPT thread compatible with Castair pump outlets and tank fittings in this size range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18\" Length:\u003c\/strong\u003e Sufficient length to absorb pump movement and vibration without being so long it sags or kinks\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless Steel Braided Construction:\u003c\/strong\u003e Braided stainless outer jacket over a corrugated flex tube — rated for compressed air service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Castair Part:\u003c\/strong\u003e Factory-specification replacement for Castair compressors using 3\/4\" NPT discharge connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVibration Isolation:\u003c\/strong\u003e Decouples the pump from the tank to protect fittings, check valves, and downstream plumbing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen to Replace This Hose\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVisible corrosion, rust staining, or cracking on the braided exterior\u003c\/li\u003e\n\u003cli\u003eKinking or permanent bending from previous installation or impact\u003c\/li\u003e\n\u003cli\u003eAir leak at either fitting end — even small leaks grow quickly under cyclic pressure\u003c\/li\u003e\n\u003cli\u003eHose has never been replaced and the compressor has 5+ years of shop use\u003c\/li\u003e\n\u003cli\u003eCompressor has been running with a hard connection (no flex hose) and you're seeing fitting or check valve failures\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFlex Hose Size Selection\u003c\/h2\u003e\n\u003cp\u003eCastair compressors use flex hoses in sizes from 3\/4\" up to 2\" NPT depending on the compressor model and HP rating. The 3\/4\" VA075 is for smaller units. Match the hose size to your pump's discharge port thread size — an undersized hose creates a flow restriction; an oversized hose requires adapters and extra leak points. Check the pump outlet directly with a thread gauge or caliper measurement if you're unsure.\u003c\/p\u003e\n\n\u003ch2\u003eAvailable Configurations — Full Flex Hose Lineup\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA075\u003c\/strong\u003e ($59.29) — 3\/4\" NPT Male x 18\" Metal Flex Hose (this part) — smaller single-stage compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA100\u003c\/strong\u003e ($99.95) — 1\" NPT Male x 18\" Metal Flex Hose — mid-size compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA050\u003c\/strong\u003e ($46.59) — 1-1\/2\" NPT x 18\" Metal Flex Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA125\u003c\/strong\u003e ($102.49) — 1-1\/4\" NPT x 18\" Metal Flex Hose — 25-40 HP rotary units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA150\u003c\/strong\u003e ($111.80) — 1-1\/2\" NPT Male x 18\" Metal Flex Hose\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA200\u003c\/strong\u003e ($131.29) — 2\" NPT Male x 18\" Metal Flex Hose — high-capacity systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA100J36\u003c\/strong\u003e ($203.28) — 1\" JIC Female\/Female x 36\" Metal Flex Hose — extended length, JIC fittings\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e1x Castair VA075 Metal Flex Hose — 3\/4\" NPT Male x 18\"\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e VA075\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Cast Air \/ Castair\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Type:\u003c\/strong\u003e 3\/4\" NPT Male on both ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e Ball Valves \/ Flex Lines\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrice:\u003c\/strong\u003e $59.29\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePressure rating and full material specifications were not available from manufacturer data at time of writing. Confirm pressure rating is suitable for your system's operating pressure before installation.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eWhy Buy From Air Compressor Factory Direct?\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCastair Specialist:\u003c\/strong\u003e We stock the full Castair flex hose lineup in all NPT sizes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Shipping:\u003c\/strong\u003e On qualifying orders to the contiguous US\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFree Tech Support:\u003c\/strong\u003e Call 866-217-0063 if you're unsure which hose size fits your compressor — we can help confirm it in a minute\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Parts:\u003c\/strong\u003e Factory-specification replacement, not a generic aftermarket substitute\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Manufacturer Warranty:\u003c\/strong\u003e Backed by Castair's standard warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCall 866-217-0063 for quick answers and help!\u003c\/strong\u003e\u003c\/p\u003e","brand":"Cast Air","offers":[{"title":"Default Title","offer_id":53342609342677,"sku":"VA075","price":109.34,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/Screenshot_37.png?v=1772652953","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-3-4npt-male-x-18-metal-flex-hose-va075","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}