{"product_id":"castair-metal-flex-hose-all-are-18-long-1-1-4-npt-for-25-40hp-rotary-compressors","title":"Castair Metal Flex Hose all are 18\" Long 1 1\/4\" NPT for 25-40HP Rotary Compressors","description":"\u003cp\u003eThe Castair VA125 is a 1-1\/4\" NPT x 18\" metal flex hose for 25-40 HP rotary screw air compressors. Rotary screw compressors in this HP range run at higher flow rates than equivalent piston units, and the 1-1\/4\" port size reflects that — it's a larger discharge connection than you'll find on most shop piston compressors. This flex hose handles the vibration isolation and thermal movement accommodation that any compressor installation requires, sized correctly for the flow volume these units produce.\u003c\/p\u003e\n\n\u003ch2\u003eWhy This Size for Rotary Screw Compressors\u003c\/h2\u003e\n\u003cp\u003eRotary screw compressors in the 25-40 HP range produce significantly more CFM than equivalent piston units. The 1-1\/4\" NPT port size on the discharge end is not arbitrary — it's sized to minimize pressure drop across the connection. Stepping down to a smaller flex hose on a high-flow unit creates a restriction that forces the compressor to work harder to maintain system pressure. Use the hose size that matches your compressor's discharge port exactly.\u003c\/p\u003e\n\u003cp\u003eRotary screw units also run continuously rather than cycling on and off like piston compressors. Continuous operation means the flex hose is under constant vibration and thermal stress — inspection and replacement on a regular maintenance schedule is more important than on a cycling piston unit that gets regular rest periods.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e1-1\/4\" NPT Connection:\u003c\/strong\u003e Sized for 25-40 HP rotary screw compressor discharge ports\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18\" Length:\u003c\/strong\u003e Standard length for direct pump-to-separator or discharge manifold connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless Braided Flex Construction:\u003c\/strong\u003e Handles continuous operating vibration and thermal cycling\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Castair Part:\u003c\/strong\u003e Factory-specified for Castair rotary screw packages in this HP range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoth-End NPT:\u003c\/strong\u003e Direct thread connection — no adapters required on standard installations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhen to Replace\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eExterior braid shows corrosion, fraying, or mechanical damage\u003c\/li\u003e\n\u003cli\u003eActive leak or seeping at either fitting — don't ignore small leaks on continuously running units\u003c\/li\u003e\n\u003cli\u003eHose has stiffened and is no longer flexible — regular inspection should include a flex test\u003c\/li\u003e\n\u003cli\u003eScheduled maintenance replacement — on continuously running rotary units, consider replacement at 3-5 year intervals regardless of visible condition\u003c\/li\u003e\n\u003cli\u003eInstallation or reconfiguration requiring a new flex hose run\u003c\/li\u003e\n\u003c\/ul\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\" — smaller single-stage piston\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA100\u003c\/strong\u003e ($99.95) — 1\" NPT Male x 18\" — mid-size compressors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA050\u003c\/strong\u003e ($46.59) — 1-1\/2\" NPT x 18\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA125\u003c\/strong\u003e ($102.49) — 1-1\/4\" NPT x 18\" — 25-40 HP rotary (this part)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA150\u003c\/strong\u003e ($111.80) — 1-1\/2\" NPT Male x 18\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA200\u003c\/strong\u003e ($131.29) — 2\" NPT Male x 18\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVA100J36\u003c\/strong\u003e ($203.28) — 1\" JIC Female\/Female x 36\" — extended length\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 VA125 Metal Flex Hose — 1-1\/4\" NPT 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 VA125\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 1-1\/4\" NPT, both ends\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 18 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e 25-40 HP rotary screw air compressors\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 $102.49\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003ePressure rating and full material specifications were not confirmed from manufacturer data at time of writing. Contact us if you need the full specification sheet for your installation documentation.\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 flex hoses for all Castair compressor models including rotary screw units in the 25-40 HP range\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 maintaining a rotary screw unit and need help with flex hose sizing or replacement intervals, we can help\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Quality:\u003c\/strong\u003e Factory-specification Castair parts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFull Manufacturer Warranty:\u003c\/strong\u003e Backed by Castair's standard product 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":53342609768661,"sku":"VA125","price":188.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0622\/8466\/0949\/files\/Screenshot_34.png?v=1772652958","url":"https:\/\/aircompressorfactorydirect.com\/products\/castair-metal-flex-hose-all-are-18-long-1-1-4-npt-for-25-40hp-rotary-compressors","provider":"Air Compressor Factory Direct","version":"1.0","type":"link"}