Kohree RV Macerator Pump 12V 12 GPM — Self-Priming with 4-Blade SK5 Grinder for Fast Tank Emptying

The Kohree 12V RV Macerator Pump is a self-priming, 12 GPM waste pump that grinds solids into a fine slurry and quickly empties RV black or gray tanks with minimal power draw.

When you need to empty an RV waste tank fast, without lugging heavy hoses or relying on campground hookups, a reliable macerator pump changes the experience. The Kohree unit combines a high-efficiency motor, a 4-blade SK5 steel grinding head, and a complete accessory kit so you can pump out tanks on the road, at home, or before storage. It’s designed to reduce clogs, preserve battery life, and handle both thick and thin waste reliably.

How quickly will it empty my RV tank?

This pump is rated at 12 gallons per minute (GPM) under ideal conditions, meaning a typical 40-gallon (150 L) tank can be emptied in roughly four minutes theoretically and usually under six minutes in real-world use. Performance depends on hose length, vertical lift, and how full the tank is.

• Flow rate: 12 GPM nominal
• Typical empty time: ~4–6 minutes for a 40-gallon tank
• Pressure capability: up to 15 PSI with 10 ft vertical lift

Will it clog with toilet paper or solids?

Kohree’s macerator uses a 4-spiral SK5 steel blade assembly that grinds solids and toilet paper down to about 1.6 mm particles, dramatically reducing the chance of blockages. The upgraded anti-clog geometry and knife steel construction keep the cutting edges sharp and reliable for repeated use.

• Blade style: four spiral SK5 steel blades
• Particle size after grinding: ≤1/16 inch (1.6 mm)
• Clog risk reduction: up to about 95% compared to standard designs

How much battery power does it use and is it safe for continuous pumping?

The motor runs on 12V DC and draws approximately 7–10 amps, so it operates directly from an RV battery without needing shore power. The unit includes thermal protection and copper-wound motor construction to resist overheating and extend service life during long empty cycles.

• Voltage: 12V DC for RV systems
• Amp draw: roughly 7–10 A under normal load
• Protection: built-in thermal cutoff and durable copper windings

What comes in the kit and will I need extra parts?

The Kohree macerator arrives as a full kit so you can start pumping right away. It includes fittings, clamps, a garden hose, a manual screwdriver for emergency hand-cranking, rubber gloves, and a hard storage case—no additional purchases are typically necessary.

• Included fittings: 3/4" NPT adapters and adjustable metal clamps
• Accessories: garden hose, screwdriver for manual crank, gloves
• Storage: protective hard case for transport and winterization

Who is this for? The Kohree 12V macerator pump is built for RV owners, boaters, and campers who want fast, low-effort tank disposal without shore power. It fits users who need a portable, anti-clog solution for black and gray water, people who empty tanks frequently at dump stations, and anyone preparing an RV or boat for storage or winterization. If you want reliable pump performance, compact portability, and a complete accessory set, this macerator offers a practical and time-saving option.