MADHOLLY Antifreeze Hand Pump Kit for RV Winterizing — 3/4" NPT Brass Connector, 2 Hoses & Clamps

MADHOLLY 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.

Winterizing 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.

How do I use the MADHOLLY pump to winterize my tanks?

Set-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.

• Attach chosen hose to pump and secure with a metal clamp.
• Connect short hose to black tank flush or city water inlet with the brass 3/4" NPT adapter.
• Pump until antifreeze appears at fixtures; run faucets and toilet.
• Trim hoses for a cleaner fit if needed; use included sealing tape for threads.

What parts are included and why do they matter?

The 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.

• 3/4" NPT brass connector — fits many RV city water and flush ports.
• Long thin hose (39.4") — reaches deep or awkward fittings.
• Short thick hose (23.6") — ideal for flush lines and high flow.
• Three metal clamps and sealing tape — ensure tight, leak-free connections.

Will this kit prevent leaks and damage during winterizing?

Yes — 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.

• Corrosion-resistant pump body for reliable handling.
• PVC hoses that remain flexible and pressure-resistant.
• Metal clamps that secure connections and limit spillage.
• Sealing tape to ensure threaded fittings seal properly.

Who 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.