{"product_id":"r125a-c-whirlpool-pump-replacement","title":"R125A-C Whirlpool Pump Replacement | Fits ITT Marlow Gemini Plus","description":"\u003cdiv class=\"whirlybros-product-description\"\u003e\n\n  \u003cdiv style=\"background:#eef8ff;border-left:5px solid #0077cc;padding:16px;margin:20px 0;\"\u003e\n    \u003cstrong\u003e✓ Whirly Bros Compatibility Verified\u003c\/strong\u003e\u003cbr\u003e\n    This replacement has been verified for compatibility with the discontinued ITT Marlow Gemini Plus R125A-C and original part number 0010F00C through specification review, plumbing comparison, electrical requirements, and real-world replacement experience.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eR125A-C Whirlpool Pump Replacement for ITT Marlow Gemini Plus\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Replace your discontinued \u003cstrong\u003eITT Marlow Gemini Plus R125A-C whirlpool pump\u003c\/strong\u003e with a modern, direct-fit replacement designed to restore dependable hydrotherapy performance without unnecessarily changing the existing bathtub plumbing.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This \u003cstrong\u003e1.25 HP, 120V whirlpool bathtub pump\u003c\/strong\u003e replaces the original \u003cstrong\u003eR125A-C\u003c\/strong\u003e, also identified by legacy part number \u003cstrong\u003e0010F00C\u003c\/strong\u003e. It features a factory-installed pneumatic air switch and includes the unions and air-switch tubing needed for a straightforward retrofit.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    The replacement operates at approximately \u003cstrong\u003e8.5 amps\u003c\/strong\u003e. Although its electrical rating may be lower than some older pump labels, it is selected to provide comparable whirlpool performance using a more efficient modern motor design.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"background:#f7f7f7;border:1px solid #dddddd;padding:16px;margin:20px 0;\"\u003e\n    \u003cstrong\u003eNot sure this is your pump?\u003c\/strong\u003e\u003cbr\u003e\n    Send Whirly Bros a clear photo of the original motor label, pump wet end, plumbing connections, and bathtub information before ordering. We will help confirm compatibility.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eWhy Choose This R125A-C Replacement?\u003c\/h2\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVerified R125A-C replacement:\u003c\/strong\u003e Replaces the discontinued ITT Marlow Gemini Plus pump.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLegacy part-number coverage:\u003c\/strong\u003e Compatible with original part number 0010F00C.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect-fit plumbing layout:\u003c\/strong\u003e Designed to align with the original installation in most applications.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003e1.25 HP performance:\u003c\/strong\u003e Restores strong, consistent whirlpool jet action.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBuilt-in air switch:\u003c\/strong\u003e Works with a standard pneumatic bathtub air-button system.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInstallation components included:\u003c\/strong\u003e Pump unions and air-switch tubing are supplied.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eModern motor design:\u003c\/strong\u003e Provides dependable performance with lower electrical consumption than many older pump designs.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOne-year warranty:\u003c\/strong\u003e Covered for the original purchaser according to the applicable warranty terms.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;margin:20px 0;\"\u003e\n    \u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n      \u003ctbody\u003e\n        \u003ctr\u003e\n          \u003cth style=\"width:38%;text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eReplacement For\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003eITT Marlow Gemini Plus R125A-C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eLegacy Part Number\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003e0010F00C\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003ePump Application\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003eWhirlpool bathtub and hydrotherapy system\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eHorsepower\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003e1.25 HP\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eVoltage\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003e120V AC\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eFrequency\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003e60 Hz\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eOperating Current\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003eApproximately 8.5 amps\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eSpeed\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003eSingle speed\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eControl Type\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003eFactory-installed pneumatic air switch\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eIncluded Components\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003ePump, unions, and air-switch tubing\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eInstallation Type\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003eDirect-fit retrofit in most original R125A-C applications\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n          \u003cth style=\"text-align:left;border:1px solid #dddddd;padding:10px;background:#f4f4f4;\"\u003eWarranty\u003c\/th\u003e\n          \u003ctd style=\"border:1px solid #dddddd;padding:10px;\"\u003eOne year to the original purchaser\u003c\/td\u003e\n        \u003c\/tr\u003e\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eR125A-C and 0010F00C Compatibility\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The original ITT Marlow Gemini Plus R125A-C is no longer manufactured. This replacement is intended for customers searching for any of the following:\n  \u003c\/p\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eR125A-C whirlpool pump replacement\u003c\/li\u003e\n    \u003cli\u003eITT Marlow R125A-C replacement pump\u003c\/li\u003e\n    \u003cli\u003eGemini Plus R125A-C pump\u003c\/li\u003e\n    \u003cli\u003eGemini Plus II whirlpool pump replacement\u003c\/li\u003e\n    \u003cli\u003e0010F00C pump replacement\u003c\/li\u003e\n    \u003cli\u003e1.25 HP ITT Marlow bath pump replacement\u003c\/li\u003e\n    \u003cli\u003e120V whirlpool pump with a built-in air switch\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\n    Compatibility should always be confirmed by comparing the complete original model number, pump orientation, plumbing alignment, voltage, and control method. Do not rely on horsepower or bathtub brand alone.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eWill the Lower Amperage Affect Performance?\u003c\/h2\u003e\n\n  \u003cp\u003e\n    Customers sometimes notice that the replacement pump has a lower amperage rating than the original motor label. Amperage alone does not determine the amount of water moved by a pump. Motor efficiency, wet-end design, impeller design, operating speed, and pump curve all affect real-world performance.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    This replacement was selected to provide equivalent performance for the original R125A-C application while using a modern, more electrically efficient motor. A lower amperage rating does not automatically mean weaker whirlpool jet action.\n  \u003c\/p\u003e\n\n  \u003cdiv style=\"background:#fff8e8;border-left:5px solid #e5a100;padding:16px;margin:20px 0;\"\u003e\n    \u003cstrong\u003eImportant:\u003c\/strong\u003e\u003cbr\u003e\n    Always confirm voltage, plumbing orientation, union alignment, and control type before installation. Never replace a 120V pump with a pump designed for a different voltage.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eDesigned to Preserve the Existing Plumbing\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The R125A-C replacement is designed to match the original Gemini Plus plumbing arrangement in most installations. This can allow the existing suction and discharge plumbing to remain in place, reducing installation time and avoiding unnecessary modifications.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    Bathtub installations can vary. Previous repairs, altered plumbing, rigid pipe alignment, or movement of the original mounting base may affect fitment. Compare the new pump with the existing installation before applying glue, changing plumbing, or permanently mounting the pump.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eBuilt-In Pneumatic Air Switch\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The pump includes a factory-installed pneumatic air switch. Pressing the bathtub air button sends a pulse of air through the small tubing to activate or deactivate the pump without placing line-voltage electricity at the tub-mounted button.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    If the new pump does not respond after installation, inspect the air button and tubing before assuming the pump is defective. Cracked, loose, pinched, water-filled, or disconnected air tubing can prevent the air switch from operating.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eWhat Is Included?\u003c\/h2\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eR125A-C compatible whirlpool pump replacement\u003c\/li\u003e\n    \u003cli\u003eFactory-installed pneumatic air switch\u003c\/li\u003e\n    \u003cli\u003ePump union fittings\u003c\/li\u003e\n    \u003cli\u003eAir-switch tubing\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\n    Review the product photographs and package contents before installation. Additional plumbing fittings or installation materials may be required if the original bathtub plumbing has been altered.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eCommon Signs That Your Whirlpool Pump May Need Replacement\u003c\/h2\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eThe pump hums but does not circulate water.\u003c\/li\u003e\n    \u003cli\u003eThe motor does not start even though proper power is present.\u003c\/li\u003e\n    \u003cli\u003eThe pump trips the breaker or GFCI.\u003c\/li\u003e\n    \u003cli\u003eThe motor has become unusually loud.\u003c\/li\u003e\n    \u003cli\u003eWater is leaking from the motor shaft or wet end.\u003c\/li\u003e\n    \u003cli\u003eThe pump overheats or shuts down during operation.\u003c\/li\u003e\n    \u003cli\u003eThe original R125A-C motor or wet end is damaged or no longer serviceable.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cp\u003e\n    Some symptoms can also be caused by a failed air button, damaged air tubing, a blocked suction fitting, loose wiring, a defective outlet, or a tripped GFCI. Confirm the source of the problem before replacing the pump.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eInstallation Recommendations\u003c\/h2\u003e\n\n  \u003col\u003e\n    \u003cli\u003eDisconnect electrical power before accessing or servicing the bathtub equipment.\u003c\/li\u003e\n    \u003cli\u003eConfirm that the replacement voltage and control type match the original installation.\u003c\/li\u003e\n    \u003cli\u003eCompare the suction, discharge, and union alignment before removing or modifying plumbing.\u003c\/li\u003e\n    \u003cli\u003eInspect the existing air button and air tubing for leaks, cracks, or loose connections.\u003c\/li\u003e\n    \u003cli\u003eInspect the union O-rings and replace them if they are flattened, cracked, or deteriorated.\u003c\/li\u003e\n    \u003cli\u003eSupport the pump properly so the plumbing does not carry the weight of the motor.\u003c\/li\u003e\n    \u003cli\u003eHand-tighten unions evenly and avoid overtightening.\u003c\/li\u003e\n    \u003cli\u003eFill the bathtub above the jets and inspect all connections for leaks before operating the pump.\u003c\/li\u003e\n    \u003cli\u003eNever operate a whirlpool pump without water in the bathtub.\u003c\/li\u003e\n  \u003c\/ol\u003e\n\n  \u003cp\u003e\n    Electrical work and installation should be completed by a qualified service professional whenever required by local regulations or when the installer is unfamiliar with whirlpool bathtub equipment.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n  \u003ch3\u003eIs this a replacement for the ITT Marlow R125A-C?\u003c\/h3\u003e\n  \u003cp\u003e\n    Yes. It is offered as a direct-fit replacement for the discontinued ITT Marlow Gemini Plus R125A-C whirlpool pump.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eDoes it replace part number 0010F00C?\u003c\/h3\u003e\n  \u003cp\u003e\n    Yes. The legacy ITT Marlow part number 0010F00C is one of the primary original numbers this pump replaces.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eIs this an original ITT Marlow pump?\u003c\/h3\u003e\n  \u003cp\u003e\n    No. The original R125A-C is discontinued. This is a modern replacement selected to match the original application, plumbing configuration, electrical requirements, and performance.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWill it connect to my existing plumbing?\u003c\/h3\u003e\n  \u003cp\u003e\n    It is designed to align with the original R125A-C plumbing in most installations. Because tubs may have been previously modified, compare the existing pump orientation and plumbing connections before ordering or installing.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eDoes the pump include an air switch?\u003c\/h3\u003e\n  \u003cp\u003e\n    Yes. A pneumatic air switch is factory installed.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eAre the unions included?\u003c\/h3\u003e\n  \u003cp\u003e\n    Yes. Pump unions and air-switch tubing are included.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhy is the replacement rated at approximately 8.5 amps?\u003c\/h3\u003e\n  \u003cp\u003e\n    The replacement uses a modern motor and wet-end design. Lower amperage does not automatically mean lower pump performance. Hydraulic output depends on the complete pump design rather than amperage alone.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eIs this a variable-speed pump?\u003c\/h3\u003e\n  \u003cp\u003e\n    No. This is a single-speed whirlpool pump with a built-in pneumatic on-and-off air switch.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCan I reuse my existing bathtub air button?\u003c\/h3\u003e\n  \u003cp\u003e\n    In most installations, yes, provided the existing button and tubing create a strong air pulse and remain in good condition.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCan Whirly Bros verify my pump before I order?\u003c\/h3\u003e\n  \u003cp\u003e\n    Yes. Send clear photos of the original label, wet end, plumbing connections, electrical cord, and overall pump installation. We will help determine whether this is the correct replacement.\n  \u003c\/p\u003e\n\n  \u003ch2\u003eWhy Buy From Whirly Bros?\u003c\/h2\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eWhirlpool bathtub replacement-part specialists\u003c\/li\u003e\n    \u003cli\u003eReal-world pump identification and compatibility experience\u003c\/li\u003e\n    \u003cli\u003eFree U.S. shipping on qualifying orders over $100\u003c\/li\u003e\n    \u003cli\u003eMost in-stock orders ship the same business day\u003c\/li\u003e\n    \u003cli\u003eTechnical assistance available by phone, text, chat, or email\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv style=\"background:#eef8ff;border-left:5px solid #0077cc;padding:16px;margin:20px 0;\"\u003e\n    \u003cstrong\u003eNeed Help Before Ordering?\u003c\/strong\u003e\u003cbr\u003e\n    Call or text Whirly Bros at \u003ca href=\"tel:+19518971878\"\u003e(951) 897-1878\u003c\/a\u003e. For the best compatibility review, include photos of the complete pump, original label, plumbing connections, and bathtub model information.\n  \u003c\/div\u003e\n\n  \u003cp style=\"font-size:0.9em;color:#555555;margin-top:24px;\"\u003e\n    \u003cstrong\u003eTrademark and Compatibility Notice:\u003c\/strong\u003e\n    ITT Marlow®, Gemini Plus®, Gemini Plus II®, Hydro Air®, NuWhirl®, and all referenced manufacturer names, model numbers, and trademarks are used solely for product identification and compatibility reference. This replacement is not represented as an original ITT Marlow pump and is not sponsored, authorized, or endorsed by the referenced trademark owners unless expressly stated.\n  \u003c\/p\u003e\n\n\u003c\/div\u003e\n","brand":"NUWHIRL SYSTEMS","offers":[{"title":"Default Title","offer_id":49496606736706,"sku":"R125A-C","price":259.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0858\/9377\/5682\/files\/nuwhirl-systems-whirlpool-water-pumps-default-title-1-25-hp-itt-marlow-gemini-plus-r125a-c-bath-pump-39033910034754_5fe8e251-c750-4de1-a598-c7986b1c5fab.png?v=1784394879","url":"https:\/\/www.whirlybros.com\/products\/r125a-c-whirlpool-pump-replacement","provider":"Whirly Bros","version":"1.0","type":"link"}