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Mellif 18V Water Pump（MT-BL1840）
Pairs well with
In stock! Ships within 3-5 business days.
90-day risk-free trial
5-Year Warranty
Complimentary shipping & returns
Mellif 18V Water Pump（MT-BL1840）
Watch the Product Review
See how real users put the Mellif water pump to the test. Watch hands-on demonstrations, performance reviews, and real-world scenarios to find out if this tool is the right investment for your projects.
Compatible with Makita 18V Batteries
Compatible with Makita 18V batteries for convenient, cordless operation. Battery and charger not included.
Self-priming & powerful
Moves up to 358 GPH, with a 60 ft max head height and 6 ft max suction lift for efficient water transfer.
High-temperature Capable
Starts quickly without manual priming and supports water temperatures up to 60°C (140°F).
Maintenance Tip
After long periods of non-use, wet the impeller with water before starting to prevent dry running and potential damage.
Product details
What's in the Box?
- 1 × Cordless Water Pump
- 1 × 1/2" NPT Male to 3/4" NH Adapter
- 1 × User Manual
- 1 × Filter
Note: Battery and charger are not included.
Specifications
- Makita 18V Compatible – Works with Makita 18V batteries （up to 2.0ah Mellif batteries） (not included) for convenient, cordless use. Currently, our mellif battery is NOT COMPATIBLE with the this pump.
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Self-Priming Pump – Starts quickly without manual priming; delivers up to 430 GPH.
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Strong Performance – Reaches 60 ft max head height and 6 ft suction lift.
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Multi-Purpose Use – Perfect for aquariums, tanks, pools, hot tubs, flooding, and garden irrigation.
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Durable Build – Includes 1/2" NPT male to 3/4" NH adapter; fits standard U.S. hoses.
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Built-In LED Light – Dual-level (100 lm & 200 lm) for use in dark or low-light conditions.
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Battery Protection – Low-voltage safeguard prevents over-discharge and extends battery life.
User Manual PDF Download
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FAQs
Will this water pump damage my Makita batteries?
No. The mellif water pump includes a built-in battery management and protection system that helps prevent over-discharge, over-current, and short circuits. When the battery reaches a low-voltage threshold, the system automatically stops operation to help protect your Makita batteries and maximize their lifespan.
Do I need to manually add water to prime the pump before using it?
No. This is a Self-Priming Pump that starts automatically without the hassle of manual priming, making water transfer quick and effortless.
How much water can this pump move, and will the flow decrease with height?
Our pump pushes up to 358 GPH (Gallons Per Hour) with a maximum head height of 60 FT and a suction lift of up to 6 FT. Like all water pumps, flow rate naturally decreases as pumping height (head height) increases due to gravity. At ground level, it drains water fast; even when pumping up to 10–15 FT high, it maintains strong, steady pressure.
💡 Pro Tip: Keep your suction hose as short as possible and elevate the pump close to the water source for maximum output!
Can it pump pond water with sediment, leaves, or slightly dirty basement water? Will the filter clog easily?
Yes. The pump features a filter that helps prevent leaves, sediment, and other debris from entering the pump. It can handle lightly dirty pond water and basement water. For best performance, clean the filter regularly and remove large debris before use.
Is the battery safe from water splashes while draining pools or flooded areas?
it’s well-protected! Designed specifically for outdoor and emergency water transfer, our pump features a Water-Resistant Battery Cover that seals your Mk 18V battery safely inside. Plus, it includes a built-in 2-gear LED flashlight (Level I: 100 lm / Level II: 200 lm), making it super easy and safe to clear flooded basements, dark yards, or water tanks at night!
Can I use my standard garden hose, or will the inlet hose collapse?
Outlet Side: YES! Our pump standard thread is 1/2" NPT Male to 3/4" NH (U.S. standard), which perfectly fits any standard 3/4" garden hose.
Inlet (Suction) Side: NO for soft hoses! The strong suction power creates negative pressure. Standard soft vinyl or thin rubber garden hoses will collapse and block the water intake.
👉 Requirement: Always use a heavy-duty reinforced, non-collapsible suction hose for the inlet to ensure continuous water flow!
What does the 5-year warranty cover?
Our 5-year warranty covers defects in materials and workmanship under normal use. This includes issues such as motor failures, electrical component defects, and product malfunctions caused by manufacturing problems.
The warranty does not cover normal wear-and-tear parts, such as blades, brushes, filters, seals, or other consumable components that naturally wear out during use. Damage caused by misuse, accidents, improper maintenance, or unauthorized modifications is also not covered.
If you experience any product issues, please contact us with your order information and product details, and our support team will be happy to assist you.