{"product_id":"castair-5-hp-cube-tankless-air-compressor-power-unit-17-5-cfm-175-psi","title":"Castair 5 HP Cube Tankless Air Compressor Power Unit – 17.5 CFM @ 175 PSI","description":"\u003cdiv style=\"font-family: Arial, sans-serif; font-size: 15px; line-height: 1.7; color: #222; max-width: 900px; margin: 0 auto;\"\u003e\n\u003ch2 style=\"font-size: 24px; font-weight: bold; color: #000;\"\u003eCastair 5 HP Cube Tankless Air Compressor Power Unit — 17.5 CFM @ 175 PSI (Mounts to Any Tank)\u003c\/h2\u003e\n\u003cp\u003eThe Castair 5 HP Cube is a tankless air compressor power unit — an oversized cast iron pump, high-efficiency motor, and mounted-and-wired magnetic starter on a compact, rigid steel frame. It delivers 22 CFM at 0 PSI and 17.5 CFM at 175 PSI, and it's designed to bolt onto a tank you already own. If your tank is still in good working order but the pump has failed, the Cube is far cheaper than replacing the entire unit — and its small footprint makes it ideal for service vans, trucks, and shops where floor space is at a premium. Built to order by Castair, a family-owned Minnesota manufacturer since 1991.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy It's Different:\u003c\/strong\u003e Whether you run a Castair tank or Brand X, the Cube mounts up with just a few bolts and connections. It ships with the magnetic motor starter already mounted and wired, a standard 3\/4″ NPT female pump outlet for the discharge connection, and a self-tensioning electric motor base so belt tension stays correct over time. The cast iron pump runs at a low RPM for quiet operation and long life, and the whole assembly is built on a rigid steel frame that's easy to service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBest For:\u003c\/strong\u003e Replacing a worn-out pump on a tank that's still in good shape, or adding compressed air to a service van or tight space.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eConfiguration:\u003c\/strong\u003e Choose single-phase or three-phase power, and your choice of pump build (a faster standard build or a slower-RPM build for quieter, longer-lasting operation).\u003c\/p\u003e\n\u003cp style=\"border: 1px solid #d00; padding: 10px; background: #fff8f8;\"\u003e\u003cstrong\u003e⚠️ BEFORE YOU ORDER — PLEASE READ:\u003c\/strong\u003e The Cube is a tankless power unit — it does not include an air tank. \u003cbr\u003e• \u003cstrong\u003eTank required:\u003c\/strong\u003e mounts to an existing ASME tank or a remote tank (sold separately). \u003cbr\u003e• \u003cstrong\u003ePressure switch required for operation\u003c\/strong\u003e (sold separately). You may also need a check valve, discharge flex line or JIC-to-NPT fittings, and vibration pads. \u003cbr\u003e• \u003cstrong\u003eElectrical:\u003c\/strong\u003e requires a dedicated 208–230V circuit (single-phase or three-phase, per your selected model), installed by a licensed electrician with proper grounding. \u003cbr\u003e• \u003cstrong\u003eLead time:\u003c\/strong\u003e built to order — confirm current production lead time before purchase. \u003cbr\u003eIt is the customer's responsibility to verify tank condition\/compatibility, required accessories, and electrical service before purchase and installation.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTankless power unit\u003c\/strong\u003e — mounts to any existing tank (Castair or Brand X) with a few bolts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCheaper than replacing the whole compressor\u003c\/strong\u003e when the tank is still in working order\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e17.5 CFM @ 175 PSI\u003c\/strong\u003e rated output (22 CFM @ 0 PSI | 17.5 CFM @ 175 PSI)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOversized cast iron pump at low RPM\u003c\/strong\u003e for quiet operation and long life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic motor starter mounted \u0026amp; wired\u003c\/strong\u003e — included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard 3\/4″ NPT female pump outlet\u003c\/strong\u003e for discharge connection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSelf-tensioning electric motor base\u003c\/strong\u003e keeps belt tension correct\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRigid steel frame construction\u003c\/strong\u003e, easy to service\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact footprint\u003c\/strong\u003e — easy to mount in service vans, trucks, or tight shops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; height: 152.93px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 25.4883px;\"\u003e\n\u003cth colspan=\"6\" style=\"background-color: rgb(0, 0, 0); color: rgb(255, 255, 255); text-align: left; padding: 10px; font-size: 15px; height: 25.4883px;\"\u003eCastair Cube 5 HP — 22 CFM @ 0 PSI | 17.5 CFM @ 175 PSI\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 25.4883px;\"\u003e\n\u003cth style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); background: rgb(243, 243, 243); text-align: left; height: 25.4883px;\"\u003eModel\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); background: rgb(243, 243, 243); text-align: left; height: 25.4883px;\"\u003ePhase\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); background: rgb(243, 243, 243); text-align: left; height: 25.4883px;\"\u003ePump RPM\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); background: rgb(243, 243, 243); text-align: left; height: 25.4883px;\"\u003eCFM @ 175 PSI\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); background: rgb(243, 243, 243); text-align: left; height: 25.4883px;\"\u003eL × W × H (in)\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); background: rgb(243, 243, 243); text-align: left; height: 25.4883px;\"\u003eWt (lb)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 25.4883px;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003eI51CUC1-S\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003eSingle\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e767\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e17.5\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e27×22×41\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e405\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 25.4883px;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003eI51CUC2-S\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003eSingle\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e420\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e17.5\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e31×24×41\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e505\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 25.4883px;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003eI53CUC1-S\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003eThree\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e767\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e17.5\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e27×22×41\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e405\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 25.4883px;\"\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003eI53CUC2-S\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003eThree\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e420\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e17.5\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e31×24×41\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid rgb(221, 221, 221); height: 25.4883px;\"\u003e505\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin-top: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth colspan=\"2\" style=\"background-color: #000; color: #fff; text-align: left; padding: 10px; font-size: 15px;\"\u003eShared Specifications\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eCastair (Spicer, Minnesota — family-owned since 1991)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eTankless cast iron piston air compressor power unit (Cube)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eTotal HP\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5 HP\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eOutput\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e22 CFM @ 0 PSI | 17.5 CFM @ 175 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003ePump\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eOversized cast iron, low-RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eVoltage\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e208–230V, single-phase or three-phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003ePump Outlet\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e3\/4″ NPT female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eFrame\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eRigid steel, self-tensioning motor base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eControls\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eMagnetic motor starter, mounted \u0026amp; wired\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eTank\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eNot included — mounts to existing or remote tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 40%; padding: 8px; border: 1px solid #ddd; font-weight: bold;\"\u003eBrand\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eCastair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCube power unit — cast iron pump + high-efficiency motor on a rigid steel frame\u003c\/li\u003e\n\u003cli\u003eMagnetic motor starter, mounted and wired\u003c\/li\u003e\n\u003cli\u003eStandard 3\/4″ NPT female pump discharge outlet\u003c\/li\u003e\n\u003cli\u003eSelf-tensioning motor base\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003e(Required for operation, sold separately — pressure switch. May also need: check valve, copper\/stainless discharge flex line, JIC-to-NPT fittings, vibration pads, remote tank. Contact us to configure.)\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eManuals \u0026amp; Documentation\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"#\"\u003eCastair Cube Installation \u0026amp; Operation Manual (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"#\"\u003eCastair Cube 5 HP Spec Sheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"CastAir","offers":[{"title":"Single-Phase \/ I51CUC1-S-767 RPM Standard","offer_id":45137253826675,"sku":"I51CUC1-S","price":2685.32,"currency_code":"USD","in_stock":true},{"title":"Single-Phase \/ I51CUC2-S-420 RPM Slow","offer_id":45137259364467,"sku":"I51CUC2-S","price":3313.64,"currency_code":"USD","in_stock":true},{"title":"Three Phase \/ I53CUC1-S-767 RPM Standard","offer_id":45137259430003,"sku":"I53CUC1-S","price":2737.68,"currency_code":"USD","in_stock":true},{"title":"Three Phase \/ I53CUC2-S-420 RPM Slow","offer_id":45137259462771,"sku":"I53CUC2-S","price":3365.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0698\/3650\/5203\/files\/test5-1_1.webp?v=1782491571","url":"https:\/\/bluecollarplanet.com\/products\/castair-5-hp-cube-tankless-air-compressor-power-unit-17-5-cfm-175-psi","provider":"Blue Collar Planet","version":"1.0","type":"link"}