{"product_id":"madholly-antifreeze-hand-pump-kit-for-rv-winterizing-3-4-npt-brass-connector-2-hoses-clamps","title":"MADHOLLY Antifreeze Hand Pump Kit for RV Winterizing — 3\/4\" NPT Brass Connector, 2 Hoses \u0026 Clamps","description":"\u003cp\u003e\u003cstrong\u003eMADHOLLY Antifreeze Hand Pump Kit is a complete manual winterizing set that lets you inject RV antifreeze into black and gray water lines using a 3\/4\" NPT connector and two hoses.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eWinterizing an RV can be messy and time-consuming if you don't have the right tools. This kit bundles a corrosion-resistant hand pump, a 3\/4\" NPT brass connector, two purpose-shaped hoses (one long and thin, one short and thick), three metal clamps and sealing tape to make antifreeze delivery fast, tidy and leak-resistant. It is designed to connect to common RV plumbing points including black tank flush lines and city water inlets, helping prepare your system for freezing temperatures without special equipment.\u003c\/p\u003e\n\n\u003ch3\u003eHow do I use the MADHOLLY pump to winterize my tanks?\u003c\/h3\u003e\n\u003cp\u003eSet-up is straightforward: attach the long or short hose to the pump, clamp it securely, and join the matching hose to the RV fitting using the 3\/4\" NPT connector. Manual pumping moves antifreeze through the line until it reaches fixtures, so you can confirm circulation by running faucets and flushing the toilet.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAttach chosen hose to pump and secure with a metal clamp.\u003c\/li\u003e\n  \u003cli\u003eConnect short hose to black tank flush or city water inlet with the brass 3\/4\" NPT adapter.\u003c\/li\u003e\n  \u003cli\u003ePump until antifreeze appears at fixtures; run faucets and toilet.\u003c\/li\u003e\n  \u003cli\u003eTrim hoses for a cleaner fit if needed; use included sealing tape for threads.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat parts are included and why do they matter?\u003c\/h3\u003e\n\u003cp\u003eThe kit contains a lightweight plastic hand pump, a brass 3\/4\" NPT connector, two hoses of different diameters and lengths, three metal clamps and sealing tape. Each component solves a winterizing need: the brass connector fits standard RV fittings, the two hose sizes let you reach different ports, and clamps prevent leaks during pumping.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e3\/4\" NPT brass connector — fits many RV city water and flush ports.\u003c\/li\u003e\n  \u003cli\u003eLong thin hose (39.4\") — reaches deep or awkward fittings.\u003c\/li\u003e\n  \u003cli\u003eShort thick hose (23.6\") — ideal for flush lines and high flow.\u003c\/li\u003e\n  \u003cli\u003eThree metal clamps and sealing tape — ensure tight, leak-free connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this kit prevent leaks and damage during winterizing?\u003c\/h3\u003e\n\u003cp\u003eYes — when used as instructed the metal clamps and quality hose material minimize leaks while pumping antifreeze through the system. The PVC hoses are designed to resist cracking and pressure, and the pump's plastic body resists corrosion, making the kit suitable for repeated seasonal use.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCorrosion-resistant pump body for reliable handling.\u003c\/li\u003e\n  \u003cli\u003ePVC hoses that remain flexible and pressure-resistant.\u003c\/li\u003e\n  \u003cli\u003eMetal clamps that secure connections and limit spillage.\u003c\/li\u003e\n  \u003cli\u003eSealing tape to ensure threaded fittings seal properly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The MADHOLLY Antifreeze Hand Pump Kit is aimed at RV owners, seasonal campers and trailer maintenance pros who prefer a manual, portable winterizing solution. It fits those who want an affordable, reusable kit to push antifreeze into black and gray tanks and plumbing lines without specialized tools or professional service. If you need a compact, durable winterizing setup that adapts to common RV plumbing connections, this kit is a practical addition to your maintenance gear.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does the kit fit standard RV fittings?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The included brass 3\/4\" NPT connector fits common RV city water and flush ports for most models.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I reuse the hoses and pump each season?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The corrosion-resistant pump and PVC hoses are designed for repeated seasonal winterizing with proper care.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"MADHOLLY","offers":[{"title":"Default Title","offer_id":67591118389433,"sku":"B0C588NKWF","price":66.08,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/madholly-front-view-kit.jpg?v=1790541661","url":"https:\/\/redleafauto.ca\/products\/madholly-antifreeze-hand-pump-kit-for-rv-winterizing-3-4-npt-brass-connector-2-hoses-clamps","provider":"Redleaf Auto","version":"1.0","type":"link"}